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C24 Hardware User Guide

1. Parameter Conditions Min Typ Max Unit Output No load AI Vip Voltage Gain Programmable by 3 17 dB AT Command AC Output 32 Q Impedance KI we 4 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 49 of 81 3 9 4 3 9 5 Ma IE d e ye x eee et MF p Bi di Ha gs Kees it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Parameter Conditions Min Typ Max Unit DC Voltage 1 V THD 32 Q load 200 Hz 0 1 Yo 20 kHz Table 3 8 Speaker Port Specifications Headset Detection The C24 operates by default in the basic audio mode with the handset audio path for DTMF tones and speech and the alert loudspeaker port for rings and alert tones The headset path is an alternate audio path in basic mode It is designed for but not limited to a personal hands free audio device a headset using the headset microphone input port and the speaker output port The HDST INT N signal is used to switch between handset and headset audio paths in basic audio mode This signal is set high by default at power up Asserting the HDST INT N signal low enables the headset audio path and disables the handset and alert paths Setting this signal high will disable the headset path and enable the handset and alert audio paths The C24 supports dynamic switching between the hands
2. 44 malag EP 14 kh 3 5 Figure 5 5 MMCX Connector Dimensions 5 9 The following table describes the C24 RF connector characteristics Contact Resistance 5 mQ center contact 2 5 mQ outer contact Insulation 1000 MQ Resistance Withdrawal Force 4 5 Ibs minimum Contact Retaention 4 lbs maximum Force Durability 500 mated cycles maximum Figure 5 6 RF Connector Specifications 5 3 Mating Connector The RF mating connector should be a standard MMCX plug connector or cable assembly which corresponds to the C24 MMCX connector specifications Any standard MMCX connector or application from different manufacturers may be mated with C24 Such a cable assembly example is the Huber Suhner PN 11 MMCX 50 1 2 111 OH which is illustrated in the following figure Item description 11 MMCX 50 1 11111 OH Connector Straight cable plug for flexible Description cable Series Pattern MMCX Type Pattern 11 Highlights SUHNER full crimp cable attachement Item number 22651666 Data sheet B 11 MMCX 50 1 1 111 0 Outline drawing B 11 MMCX 50 1 1 11 O Catalogue drawing B 11 MMCX 50 1 1 111 O Related documents A Assembly Instruction 2002 95 EC compliant RoHS Interface Standards SUHNER MMCX Mechanical data Cable Entry Centre Contact Cable Entry Outer Contact Engangement Force max Disengangement F min Disengangement F max Dielectric Size Electrical data
3. Regulatory Requirements The C24 module is compliant with applicable FCC and IC requirements The integrated system incorporating the C24 module may be subject to further regulations and standards it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Telit strongly recommends that the system integrator seeks professional advice regarding the regulations and standards that apply to their product The Federal Communications Commission FCC requires application for certification of digital devices in accordance with CFR Title 47 Part 2 and Part 15 This includes Electromagnetic Energy Exposure EME testing As the C24 modem is not a standalone transceiver but is an integrated module the C24 cannot be tested by itself for EME certification It is however the integrator s responsibility to have the completed device tested for EME certification The C24 module is compliant to FCC and IC requirements allowing use within North America Use in other regions may require regional type approvals which the manufacturer of the final product integration or reseller will be responsible for procuring It is strongly recommended that professional advice be sought before placing the finished integrated product on the market to establish local approval and marking requirements 1 10 Safety Statement and Requirements Certain safety precautions must be observed during all phases of the operation usage service or repair of any cellular
4. The Telit and 3rd Party supplied Software SW products described in this instruction manual may include copyrighted Telit and other 3rd Party supplied computer programs stored in semiconductor memories or other media Laws in the United States and other countries preserve for Telit and other 3rd Party supplied SW certain exclusive rights for copyrighted computer programs including the exclusive right to copy or reproduce in any form the copyrighted computer program Accordingly any copyrighted Telit or other 3rd Party supplied SW computer programs contained in the Telit products described in this instruction manual may not be copied reverse engineered or reproduced in any manner without the express written permission of Telit or the 3rd Party SW supplier Furthermore the purchase of Telit products shall not be deemed to grant either directly or by implication estoppel or otherwise any license under the copyrights patents or patent applications of Telit or other 3rd Party supplied SW except for the normal non exclusive royalty free license to use that arises by operation of law in the sale of a product di Bt S To igos Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 3 of 81 lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 VENDOR COPYRIGHT Apache Software Foundation Copyright 2004 2005 All Rights Reserved Repradu tion forbidden without writte
5. PN 7111S1615A05 LIM VCC UM RST N UIM CLK C24 UIM PD N LIM DIO VPP NC Figure 3 13 C24 UIM Interface it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 od UIM VCC 2 85V Supply to the UIM Ra UIM_RST_N Active low reset signal 2 UIM_DIO Serial input and output data UIM_CLK Serial 3 25 MHz clock UIM_PD_N Active low card presence detection Table 3 5 UIM Interface Signals 3 8 1 1 UIM Design Guidelines The UIM interface and signals design is important for proper operation of C24 and the UIM card Below are several design guidelines that must be followed to achieve a robust and stable design that meets the required standards and regulations e Two 100nF low ESR capacitors must be placed in parallel on the UIM_VCC signal line The capacitors should be located as near as possible to the UIM card tray contacts The capacitors value may slightly change depending on the application design e A 569 series resistor must be placed on the UIM_DIO signal line The resistor value may slightly change depending on the application design e A 1009 series resistor must be placed on the UIM_CLK signal line The resistor value may slightly change depending on the application design e It is recommended to design component placeholders unpopulated for capacitors on the UIM_RST and UIM_DIO signal lines e The UIM card tray should be located and its signals should be routed away from any possible EMI
6. operating voltage may degrade the module performance To minimize the losses and transients on the power supply lines it is recommended to follow these guidelines e Use a 100 uF or greater low ESR capacitor on the C24 supply inputs The capacitor should be located as near to the C24 interface connector as possible e Use low impedance power source cabling and board routing e Use cabling and routing as short as possible e Filter the C24 supply lines using filtering capacitors as described in the following table Capacitor Description 100 uF Transmit current serge Minimizes power supply losses during transmission 10 nF 100 nF Digital switching noise Filters digital logic noises from clocks and data sources 8 2 pF 10 pF 1900 MHz CDMA Filters transmission EMI band 33 pF 39 pF 800 MHz CDMA band Filters transmission EMI Table 3 3 Recommended Power Supply Filtering Power Consumption The following table specifies typical C24 current consumption ratings in various operating modes The current ratings refer to the overall C24 current consumption over the VCC supply Joer A Tipe Idle mode Registered S Sep SS FT TEL E E Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 32 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Average CELL Band transmitcurrent PCS Band Per CDG89 Test Requirements Maximum T
7. 0 5 seconds and a maximum of 1 5 seconds will cause the C24 to turn on The following figure illustrates the power on process using the ON_N signal Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 33 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 VCC e 500ms min el ON N N 3200ms CTS N 200m Figure 3 2 ON N Power On Timing 3 4 1 Turning the C24 On Using IGN To turn on C24 the IGN signal must be asserted high The IGN signal must remain high for the duration of the C24 operation C24 powers down when the IGN signal is returned to its low state The following figure illustrates the power on process using the IGN signal YCC IGN OOH eg 3200ms CTS_N 200ms aQ Figure 3 3 IGN Power On Timing 3 4 2 Turning the C24 Off There are several ways to turn the C24 off e Asserting the ON N signal low for a minimum of 2 seconds e Setting the IGN signal low e AT command WA SSC Sie lt emm Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 34 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 3 4 2 1 Turning the C24 Off Using ON N Asserting the ON N signal low for a minimum of 2 seconds will turn C24 off This will initiate a normal power off process which includes disabling of all application
8. Absolute Maximum Ratings The following table gives the maximum electrical characteristics of the C24 interface signals A CAUTION Exceeding the values may result in permanent damage to the module Digital Input Signals C24 powered on Except for IGN VBUS USB_DP USB_DN Analog Input Signals C24 powered on Audio A D interfaces All Input Signals Except for IGN VBUS USB_DP USB_DN VBUS signal USB_DP USB_DN Table 4 1 Maximum Ratings 4 rf f 7 EN 5 E E Wi a fa Ee Nag b 5 3 emeng Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 66 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 4 2 Environmental Specifications The following table gives the environmental operating conditions of the C24 module A CAUTION Exceeding the values may result in permanent damage to the module Standard Operating 30 85 C Temperature At antenna connector Air Contact At interface connector Table 4 2 Environmental Ratings Page 67 of 81 Reproduction forbidden without written authorization from Telit Comm nicati s S p A All Rights Reserved it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 4 3 Application Interface Specifications The following table summarizes the DC electrical specifications of the application interface connector signals AN IMPORTANT Interface sig
9. Basic mode Handset SPKR_N SPKR_P Default audio path for speech and DTMF tones Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 53 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Audio Path anag Output Signal Description Headset HDST MIC SPKR N SPKR P Alternate path for headset device Enable by setting HDST INT N interface signal low Alert ALRT N ALRT P Default alert and ringer loudspeaker output port Digital PCM DIN PCM DOUT Enable digital path by AT MADIGITAL 1 Table 3 10 Basic Mode Audio Paths 3 9 7 2 Advanced Mode Advanced mode utilizes C24 s unique set of AT commands for advanced audio programming The expanded AT command set enables to define a specific audio path and setting which are not part of the default configuration for each type of audio sound speech DTMF tones rings and alerts Unlike basic audio mode which provides predefined audio paths the advanced audio mode provides full control over the C24 audio interface and its parameters and differentiates between each type of audio sound The following table describes the advanced mode audio programming features These features are only a part of the complete advanced audio AT command set AT MAPATH Sets the input device for voice and the output devices for voice DTMF tones rings and alerts AT MAFEAT Enables and disables the speech processing al
10. C24 to Idle mode C24 will not return to low power mode until an ATS24 gt O commands is set again This command can be sent only when the serial interface is active In case the serial interface is disabled it must first be activated before sending this command To reactivate the serial interface a temporary termination of the low power mode is required as described in Temporary Termination of Low Power Mode Following the temporary low power mode termination the serial interface will activate and the ATS24 0 command can be received by C24 3 6 Real Time Clock C24 incorporates a Real Time Clock RTC mechanism that performs many internal functions one of which is keeping time The RTC subsystem is embedded in the PMIC and operates in all of the C24 operating modes Off Idle Sleep as long as power is supplied above the minimum operating level The C24 time and date can be set using the following methods e Automatically retrieved from the network C24 operates in a CDMA network that supports automatic time zone updating it will update the RTC with the local time and date upon connection to the network The RTC will continue to keep the time from that point e Using the AT CCLK command Setting the time and date manually by this AT commands overrides the automatic network update Once the time and date are manually updated the RTC timer will keep the time and date synchronized regardless of the C24 operating state When
11. Gin Ten ln AN AA AA Ka GAL 21 1 14 1 Disposal of Telit equipment in EU countries 0 cece eceeeeeceeeeeeeeeseeeeteeeeeeeeeeseseennaaes 21 1 14 2 Disposal of Telit equipment in non EU Countries 21 2 General Product DE5ErIproN GANA NAA 23 dil JPPOOUCE PEO NGA NONG ATA NAA 23 2 2 Certifications Approvals sitar catdvansncsi sie taxi sadaivinaeeiaiasastiseniiersardeanasecadeataneaeaniadualavanats kay Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 6 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 2 3 Regulatory Ze AA MAAGA KAANAK AA GA 27 3 Hardware Interface Description 29 3 1 Architecture EE EE 29 3 2 Ope r ting MOC S ee 30 3 3 P w r SUpply renni aeai e ei niea ie e aae AA 31 3l Power Supply Desig Msisimko e ea ee Gad 32 3 3 2 Power Consumption NNAAAAAKKENENNE ENE NA AAAANNESGG 0 EEEE EEEE EEEE EEE 32 3 4 eebe AGDAL Ka Ee EES 33 34 1 Turning the C24 On Using IGN serieei HAN NA SCAS tenders 34 34 2 TURNING the C24 DIE ak GG eeben 34 3 4 3 Turning the C24 Off Using AT MRST Naa anannsssnss00nnananananssnns 36 34 4 Power Loss shut COW PAAANO 36 3 5 Low Power MADE AGA KAGALAKAN KAANAK AGA 36 3 5 1 Activating Low Power Mode 36 3 5 2 Serial Interface During Low Power Mode 37 3 5 3 Terminating Low Power Mode 38 3 5 4 Temporary Termination of Low Power Mode 38 3 5 5 Using the WKUPI_N Signal s0 00a aaa GANGNGGGGG a a 38
12. HyperTerminal and configure it to operate with the serial port occupied by the C24 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 6 Open a second terminal window and configure it to operate with the serial port occupied by the line modem Developer Board with C24 unit Line Modem internal or external To telephone line wall outlet Figure 1 1 Test Setup 1 5 2 Test Procedure To Perform the C24 Test Follow the procedure below to perform the C24 test 1 Verify that the line modem is functioning and communicating with the computer by entering the AT command at in the modem s terminal window This common AT command prompts a properly working modem to reply OK Verify that the C24 is functioning and communicating with the computer by performing the following AT commands in the C24 terminal window ati7 prompts C24 identification The C24 will reply C24 OEM Module ati8 prompts the C24 software version Make a CSD call from the C24 to the line modem or the reverse using the atd and ata commands in the appropriate window Verify that a connection between the two modems is established Select any file to transfer between the two modems The file can be any existing file or a new file created specifically for the test Send the file either from the C24 or to the C24 through the terminal application using the terminal application s send receive file options
13. Impedance Interface Freq max Environmental and general data Operating Temp min Operating Temp max Weight Number of Matings Figure 5 7 Optional MMCX Cable Assembly BANO tt Reproduction forbidden without written authorization from Telit Communication i s S p A All Rights R Z e Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Jump to Top crimped crimped 15N 6N 15N 1 Jump to Top 50 a 6 GHz Jump to Top 55 C 155 C 0 0009 kg 500 eserved Page 78 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 5 4 C24 Mounting The C24 incorporates 2 mechanical holes for installing the module onto the application board The holes are 2 4 millimeters in diameter which accommodates several types of mechanical elements Several mechanical approaches may be applied to mount and fasten C24 to the application board Using M2 screws with suitable washers to mount the module onto spacers a bracket or chassis is a recommended design Special attention must be paid to the area surrounding the C24 mounting holes A grounding pad of 4 4 milimeters in diameter surrounds these holes The diameter and area of this pad must not be exceeded by any mechanical or electrical element Several electrical components which are not shielded are located near the holes These components must not be in contact with the mounting elements or with other parts of the application boa
14. Mating Connector Stacking Height Molex 53748 0708 Molex 52991 0708 3 0 mm Table 5 1 C24 Interface Connector Options The following figure shows the C24 interface connector 537480708 3 0mm Figure 5 3 C24 Interface Connector The following table describes the C24 interface connector characteristics C Contact Resistance Insulation 100 MQ minimum Resistance Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 75 of 81 5 2 1 S it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 30 mating cycles maximum Table 5 2 Interface Connector Specifications Mating Connector The mating connector incorporates the same electrical and mechanical characteristics as the corresponding C24 interface connector which is described in the preceding table The following figure provides a reference drawing of the mating connector mechanical dimensions 52991 0708 3 0mm Figure 5 4 Mating connector Dimensions For more information on the C24 mating connector please refer to the Molex web site at http www molex com RF Connector Specifications The C24 uses a standard MMCX receptacle connector for the radio interface The following figure shows the MMCX connector dimensions it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 0 37 A Ss
15. Ta ges Ra a L TT Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 72 of 81 Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 d SE Active Internal en pina saa eer PU PD purp Maximum Input Level General ADC purpose A D j Active sampling 47 ADC3 General anse purpose A D E sx el ee el ee Gap GR Bl eee Table 4 3 Interface Specifications J pa Reproduction forbidden without written authorization from Telit Communications S p A All Rights a Page 73 of 81 Reproduct 3 Mechanical Specifications 5 1 Board Dimensions The following figure describes the C24 mechanical characteristics SUOT be Stacking Height C24 Application Board i Figure 5 1 C24 Mechanical Characteristics sa T EETA TI Gs Pin 1 Pint Pin 69 P Pin 70 H 4 q pa if e A gt 5 an y bin ion forbidden without written authorization from Telit Communications S p A All Rights R eserved lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Page 74 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Did Interface Connector Specifications The C24 uses a single 70 pin 0 5 mm pitch board to board connector for the application interface as described in the following table C24 Connector
16. When the file transfer is complete use the ath command in any of the terminal windows to terminate the call This step completes the test You can now continue to perform additional tests using the same setup or change the setup as required 1 6 1 7 gt 1 8 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Document Organization This manual contains the following chapters e Chapter 1 introduces the C24 unit and provides important safety instructions support and contact information e Chapter 2 provides a detailed hardware description of the blocks and components comprising the C24 e Chapter 3 provides a hardware interface description for C24 connectors e Chapter 4 provides electrical and environmental specifications e Chapter 5 provides mechanical specifications for C24 e Chapter 6 provides acronyms abbreviations and the document s revisions log Text Conventions Danger This information MUST be followed or catastrophic equipment failure or bodily injury may occur Caution or Warning Alerts the user to important points about integrating the module if these points are not followed the module and end user equipment may fail or malfunction Tip or Information Provides advice and suggestions that may be useful when integrating the module All dates are in ISO 8601 format i e YYYY MM DD Related Documents e C24 Developer s Kit e C24 AT Commands
17. advanced speech processing algorithms for echo suppression noise suppression and side tone feedback Enabling or disabling the algorithms can be configured separately for each audio path and operating mode through the AT command interface The C24 also supports EVRC EVRC B and 13K speech coding algorithms which are used by the CDMA network These algorithms are configured and operated by the CDMA network provider Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 The following table gives the speech processing features Default AT Command Setting Description Echo Suppression Controls the echo and noise ATS96 AT MAFEAT Disabled suppression Noise Suppression ATS94 AT MAFEAT Enabled Controls the sidetone Table 3 12 Speech Processing Features 3 9 8 2 Gain Control The amplification gain level for each input and output device can be configured through AT commands Both basic and advanced audio modes provide AT commands to set the desired gain levels for each audio path and audio sound type The following table gives the gain control features Default Gain Command Gain Description AT MMICG AT MMICG Headset 16 Sets input speech gain level Microphone LE ee _ ppa Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 56 of 81 y pi Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31
18. neither does it convey license under its patent rights or the rights of others It is possible that this publication may contain references to or information about Telit products machines and programs programming or services that are not announced in your country Such references or information must not be construed to mean that Telit intends to announce such Telit products programming or services in your country Copyrights This instruction manual and the Telit products described in this instruction manual may be include or describe copyrighted Telit material such as computer programs stored in semiconductor memories or other media Laws in the United States and other countries preserve for Telit and its licensors certain exclusive rights for copyrighted material including the exclusive right to copy reproduce in any form distribute and make derivative works of the copyrighted material Accordingly any copyrighted material of Telit and its licensors contained herein or in the Telit products described in this instruction manual may not be copied reproduced distributed merged or modified in any manner without the express written permission of Telit Furthermore the purchase of Telit products shall not be deemed to grant either directly or by implication estoppel or otherwise any license under the copyrights patents or patent applications of Telit as arises by operation of law in the sale of a product Computer Software Copyrights
19. not exceed 5 3 dBi 800 band The combined cable loss and antenna gain must not exceed 4 2 dBi and total system output must not exceed 2 0W EIRP in the PCS 1900 band in order to comply with the EIRP limit of 24 232 b OEM installers must be provided with antenna installation instruction and transmitter operating conditions for satisfying RF exposure compliance e For system integrations requiring higher antenna gain or position closer than 20 cm from the body SAR compliance testing of the completed product will be required It is strongly recommended that the system integrator seeks the advice of a suitably accredited test laboratory to develop a test plan and carry out necessary testing 1 12 Standards Interoperability Specification for cdma2000 Air Interface 3GPP2 C S0044 A Signaling Conformance Test Specification for cdma2000 Spread Spectrum Systems 3GPP2 C S0031 0 Signaling Conformance Tests for cdma2000 Spread Spectrum Systems TIA EIA 898 December 2001 Telecommunications Industry Association Recommended Minimum Performance Standards for cdma2000 Spread Spectrum Mobile Stations 3GPP2 C S0011 C Recommended Minimum Performance Standards for cdma2000 1 Spread Spectrum Mobile Stations TIA 98 F September 2005 Telecommunications Industry Association Recommended Minimum Performance Specification for C S0022 0 Spread Spectrum Mobile Stations 3GPP2 C S0036 0 Recommended Minimum Performance Specification for TIA EIA IS
20. on the hardware revision and software version of a specific C24 model and also the capabilities of the host application which must provide a user interface and control the module via AT commands The parameters and values provided in this manual are defined under typical conditions These values may vary when subject to different conditions such as SW version network status application settings and environmental conditions 1 2 Audience This manual is intended for all members of the integration team who are responsible for integrating the C24 module into the host OEM device including representatives from hardware software and RF engineering disciplines 1 3 Contact Information Support This section provides contact information for any possible queries that may arise for example e Have questions e Having trouble getting the Developer Board set up e Technical questions e Configuration questions problems e Technical operating problems Need documentation For general contact technical support to report documentation errors and to order manuals contact Telit Technical Support Center TTSC at TS EMEA telit com TS NORTHAMERICA telit com TS LATINAMERICA telit com TS APAC telit com Alternatively use Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 13 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31
21. sources such as the RF and digital switching signals e The UIM interface signals length should not exceed 100mm between the C24 interface connector and the UIM tray e The UIM clock and data signals UIM_CLK and UIM_DIO should be routed separately on the application board and preferably isolated by a surrounding ground plane e In case that transient suppressors zener diodes etc are used by the application on the UIM card signals individual package components not arrays with low capacitance should be used e The C24 interface does not support UIM programming through the VPP signal This signal should not be connected to C24 e Using the UIM detection signal UIM PD N is mandatory in case that the UIM card is accessible to the user and may be removed during C24 operation To avoid damage to the UIM or C24 the UIM interface signals must be deactivated before the UIM card is mechanically removed from the UIM tray contacts Therefore the UIM PD N detection signal must be disabled before the UIM is removed from the tray Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 44 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 3 9 Audio Interface The C24 audio interface supports several audio devices and operating modes The audio interface s operating modes active devices amplification levels and speech processing algorithms are fully controlled
22. while the NMEA is through UART2 and USB it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Accuracy The accuracy must be less than 50 meters 67 of the time and 150 meters 95 of the time The following table gives the GPS Receiver Specifications Parameter Conditions Typ Unit Receiver Sensitivity 155 dBm TTFF Cold Start 7 5 Min Autonomous Warm Start 10 Sec TTFF Cold Start 8 Sec Assisted Warm Start 3 Table 3 21 GPS Receiver Specifications 3 13 Antenna Interface The C24 antenna connector is the RF interface to the CDMA network and GPS system The antenna interface is terminated by an MMCX connector type which is 50Q impedance matched at the relevant CDMA frequencies The antenna or antenna application must be installed properly to achieve best performance The following table gives the antenna interface specifications Parameter Specifications Cellular CDMA 824 04 848 97 MHz Tx 869 04 893 97 MHz Rx US PCS 1850 1910 MHz Tx 1930 1990 MHz Rx GPS 1575 42 MHz 1 024 MHz Gain 0 dBi unity gain or greater Impedance 50Q VSWR Less than 2 5 1 Table 3 22 Antenna Interface Specifications aa Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 65 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 A Electrical and Environmental Specifications 4 1
23. 2 08 31 d SE Active Internal zt Signal Name Description PU PD Parameter Conditions UART1 L RTS N UART1 RTS LJ 100K PU DTR N UART1 DIR bala 100K PU USB pan N 1 Per USB Specifications Rev 2 0 a y B m Page 70 of 81 Z KH Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 3 0 ere Ce 100K PU 2 0 v detect kg 0 3 2T 2 85 2 95 UIM_RST_N UIM reset ES UIM_ UIM_DIO UM 5 1K PU vec data UIM_CLK UIM clock i Digital Audio PCM_ Digital audio DIN receive PCM_ Digital audio DOUT transmit PCM_CLK Digital audio clock PCM FS Digital audio frame sync General error purpose I O General GEIO2 purpose I O General Gros purpose I O 2 Per ISO 7816 3 IC specifications Apa a Te Reproduction forbidden without written authorization from Telit Communications S p A All Rights degen Page 71 of 81 Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Internal PU PD Signal Name Description Parameter Conditions General Cuo purpose I O General purpose I O General purpose I O General purpose I O General purpose I O 67 Speaker SPKR_N inverted Hands free Speaker H SE Hands free ALRT N Alert speaker inverted A ALRT P Alert speaker D HR KS Ei AGND Audio ground Headset microphone Single ended no load Single ended no load Headset detect interrupt 100K PU i ng DE 2 77 RS i
24. 3 6 RealTime Clock NANANA AE GAGANA ANG AA 40 37 OPTS un e 41 3 7 1 Eeer UART Dama aaa eene 41 3 7 2 Secondary UART E 41 3 7 3 USB MRS isre aaa AA AA AA AAO 42 3 8 UIM AA 43 L81 UIM CONECO AA AA AA AA AP 43 3 9 Audio lnterfate EE 45 3 9 1 Handset Microphone Porn NINA NINANG KAN GG 45 3 9 2 Headset Microphone Port 46 O NA E gedet EE E E EA 48 3 9 4 Headset DEER AA BANAAG ARA AGA AA kaa 50 3 9 5 Alert Loudspeaker Port b00 NAA AA GNNGNGG GNG ENNA AA KAKKNENNNG ENNA AAAANNNNNGKK0 knna AA aannnnsnnn 50 3 9 6 Digital Audio Interface b000 NANA ANNGGGG GNG ENNNAAAANANEEENEEENNNAAAAANGNGK0G0 00Na Ennan eeen 52 EES AN Set glo Beet 53 3 9 8 Audio Programming Interface 55 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 999 Audio RTE EE 58 dilg ADI eene 59 3 10 1 General Purpose A D AA AA 59 3 10 2 Power Supply A D aaa NADAAN NANG Naa 60 3 11 Controls and Indicators Interface La amn 60 Jala RESET aa AN NA EE a aala Mana 61 3 11 2 VREF Reference Regulator cccccccccccceceeseeenceeeeeeeeeeeeeencaeeeeeeeeeeseensaneeeeeeeesssesesnneeeeeees 61 SAMs Wakeup OU i maa Re AGANG ARUGA BANDA 62 3 11 4 Antenna Detecthon ENNA NA AAKANEENNGEEENKAAAANNGNGGK00 00K NAA Reee ennea 64 3 11 5 CDMA Network Indicator cecccccccccccceeeeeeeeenceeeeeeeeeceeeeeaeeeeeeeeeesceenaaeeeeeeeesseeesnneeeeeees 64 3 11 6 Transmission Indicator cirea aaea iaer E Eann a EEEE AEE E E ERREEN 64 3 11 7 General Purpose HO AN
25. 4 E 74 Figure 5 3 C24 Interface Connector ec eseecsseeeeceecesecseeeeeesecsceeseesecsaesaeesecsaecaeeeeesecaaeeaeeseceaeeaeeeeeeaecaeeeneeas 75 Figure 5 4 Mating connector Dimensions ee eecceeeeeseeeseeeseceesceeseecsaecsaecsuecsaeceseceseesseeeeeeeeeeeeaeeeaeeeaeeeaaeeaaes 76 Figure 5 5 MMCX Connector Dimensions sseseeessiseeeresrsttresrssrsestsststertsessestestssststtetstststisesststestsssrsrestsets 77 Figure 5 6 RF Connector Specifications csccssccscceceocesceescscesectencesecnecenseseseesoesencaenaenencenesueceosenseneeseanenees 77 Figure 5 7 Optional MMCX Cable Assembly AAA 78 Figure 5 8 C24 Mounting Areas na AA AA ANAK AB PAGGANA ANAN 79 WA E Sie lt emm Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 11 of 81 Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 4 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 12 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 1 Introduction 1 1 Scope This manual provides the electrical mechanical and environmental requirements for properly integrating the C24 module in a host application This manual gives a complete set of hardware features and functions that may be provided by C24 The availability of any feature or function which is described in this manual depends
26. 801 1 Spread Spectrum Mobile Stations TIA 916 April 2002 Telecommunications Industry Association Signaling Conformance Specification for cdma2000 Wireless IP Networks 3GPP2 C S0037 0 Signaling Test Specification for Mobile Station Equipment Identifier MEID Support for cdma2000 Spread Spectrum Systems 3GPP2 C S0073 0 Signaling Conformance Test Specification for cdma2000 Spread Spectrum Systems 3GPP2 C S0043 0 Signaling Conformance Test Specification for cdma2000 Air Interface TIA 1035 Signaling Conformance Test Specification for Over the Air Service Provisioning 3GPP2 4 ei e zs BI R a ry 2 paa Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 19 of 81 NK 1 13 1 1 13 2 1 13 3 1 13 4 1 13 5 1 13 6 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 C S0060 0 Signaling Conformance Test Specification for Short Message Service 3GPP2 C S0061 0 Data Signaling Conformance Test Specification For COMA2000 Air Interface 3GPP2 C S0062 General Safety Remember safety depends on you The following general safety precautions must be observed during all phases of operation service and repair of the equipment described in this manual Failure to comply with these precautions or with specific warnings elsewhere in this manual violates safety standards of design manufacture and intended use o
27. A ellen 64 Sele D EE TANAN AGA AGARAN NAGANA iA 64 3 13 Antenna SAC EE Ee 65 4 Electrical and Environmental Specifications anan aa nana nananaanasana 66 4 1 Absolute Maximum SUNOS na ANA AKA AA AA 66 4 2 Environmental ee e EE 67 4 3 Application Interface Zeta Men et SEAN GENEE EECHER 68 5 Mechanical Specifications ia ANAK Aa AA 74 5 1 Board DIMENSIONS ANAN AA NANANA 74 5 2 Interface Connector Specifications La GAIN NANANABIK B KAG 75 521 Mating Connector aaa ae EE ee hha 76 5 3 RP Connector Specifications sla aa a aaa ksa 76 Sol Mating Konter et eeuensi eed eiesegeed dae gene d e eege dg deed edd 77 Fbs C24 MOUNINO EE 79 6 Acronyms and abbreviations aa AA AG AA ANA 80 bile DOGUMEN NON naaa NAA AN ANAKAN BAITANG KAYA 81 Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 4 Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 9 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 List of tables Table 2 1 Product Specitications 25s nanan AA AA ANA TAN PANG BANANA Eed Ee 26 Table 3 1 C24 Operating MOBS aa NATAN sacdabbvssctdepedsetgabesatl dave NANA ANDA 31 Table 3 2 Power Supply Signals accssessczsssecheisiachedsnsobectous AA CAE Ee KEES ege dE AND NGANGA 31 Table 3 3 Recommended Power Supply Filtering sawaan bawa buwa awas anas anas aunsaunssonsssnsesssscsssssnsssanos 32 Table 3 4 C24 Current Rating S
28. C CELL PCS LGA Termination Directional Couplers e IC CELL PCS 3x3 Power Amplifier Module e IC CELL PCS Tx Filter Operating Modes C24 incorporates several operating modes Each operating mode is different in the active features and interfaces The following table summarizes the general characteristics of the C24 operating modes and provides general guidelines for operation Page 30 of 81 3 0 Description Not Powered VCC supply is disconnected RTC Mode Valid VCC supply RESET_N signal is enabled low Idle Mode RESET_N signal is disabled high CTS_N and DSR_N signals are enabled low Sleep Mode RESET_N signal is high CTS_N signal is disabled CSD call or RESET_N signal is high GPRS data TXEN_N signal is Enabled Low it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 The C24 is Off Any signals connected to the interface connector must be set low or tri state The C24 Interfaces are Off Only the internal RTC timer is operating Any signals connected to the interface connector must be set low or tri stated The C24 is fully active registered to the network and ready to communicate This is the default power up mode The C24 is in low power mode The application interfaces are disabled but C24 continues to monitor the network A voice or data call is in progress When the call terminates C24 returns to the last operating state Idle or Sleep Table 3 1 C24 Operatin
29. Communications S p A All Rights Reserved Page 81 of 81
30. Default Gain Command Gain Description Alert Alen speaker amak span Sets an rngsand ter gain an rngsand ter gain alerts gain pee 3 13 EE ee Control aoe Gain levels for the input and output devices which correspond to the values set by the AT commands are described in the following tables AT Command Gain Level OdBm0 Output Level mVrms AT Command Gain Level Maximum Input Value dB Level mVpms ie i ma Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 57 of 81 3 9 7 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 AT Command Gain Level Maximum Input Value dB Level mVpms Table 3 15 Microphone and Headset Microphone Port Gains Audio Design The audio quality delivered by C24 is highly affected by the application audio design particularly when using the analog audio interface Therefore special care must be taken when designing the C24 audio interface Improper design and implementation of the audio interface will result in poor audio quality Poor audio quality is a result of electrical interferences or noises from circuits surrounding the audio interface There are several possible sources for the audio noise e Transients and losses on the power supply e EMI from antenna radiations e Digital logic switching noise Most of the audio noise originates from the DC supply current which appear on the
31. Full Rate EGPRS Enhanced General Packet Radio Service EGSM Extended Global System for Mobile Communications EIRP Effective Isotropic Radiated Power EMC Electromagnetic Compatibility EOTD Enhanced Observed Time Difference EPOS Electronic Point of Sale ERP Effective Radiated Power ESD Electrostatic Discharge ETSI European Telecommunication Standards Institute FCC Federal Communications Commission U S FR Full Rate FTA Full Type Approval GCF GSM Certification Forum GPIO General Purpose Input Output GPRS General Packet Radio Service GSM Global System for Mobile Communications HR Half Rate IC Integrated Circuit LNA Low noise Amplifier MMCX Miniature Micro Coax MO Mobile Originated MT Mobile Terminated Ce gsh i pa ai igos Ma Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 80 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 OEM Original Equipment Manufacturer PCB Printed Circuit Board PCL Power Class Level PCM Pulse Code Modulation PCS Personal Communication System also known as GSM 1900 6 1 Document history Revision Date Changes 0 2011 05 04 2012 08 31 Added Figure 5 2 C24 pin location ki aie SC pa Sj an Reproduction forbidden without written authorization from Telit
32. N signal The WKUPI_N signal is an active low input which is set high by default By asserting this signal low the application can wake up C24 from low power mode and switch to Idle mode C24 will remain in Idle mode awake and fully active as long as WKUPI_N signal remains low When this signal is disabled and set high again C24 will return to Sleep mode automatically according to the ATS24 settings see following figure 3 5 5 1 3 5 5 2 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 WKUPI N 15ms min i ATS24 Sleep l Idle a E a isable CTS_N TNT Enabled C24 Mode Figure 3 8 WKUPI N Signal Operation The WKUPLWN signal is the recommended method to temporarily wake up C24 from low power mode It provides the application full control of the C24 operating mode and guarantees that data on the serial interface will not be lost or misinterpreted The WKUPL N signal must be used to wake up C24 from low power mode if the serial interface has been disabled by the AT MSCTS command Incoming Network Data During low power mode C24 continues monitoring the CDMA network for any incoming data message or voice calls When C24 receives an indication from the network that an incoming voice call message or data is available it automatically wakes up from low power mode to alert the application When C24 has completed to process all the tasks related to the incoming data it will automat
33. Teli C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 wireless solutions a DI KI KL p ken ra naa ba na VS A Fe e L si i E 8 t Making machines talk lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 APPLICABILITY TABLE PRODUCT ri JF z V gt H h deM KR 3 E e ome NG E p3 d F E Aa ii j A y AN Vet Ng e B S i s F F Ea P gef Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 2 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 SPECIFICATIONS SUBJECT TO CHANGE WITHOUT NOTICE Notice While reasonable efforts have been made to assure the accuracy of this document Telit assumes no liability resulting from any inaccuracies or omissions in this document or from use of the information obtained herein The information in this document has been carefully checked and is believed to be entirely reliable However no responsibility is assumed for inaccuracies or omissions Telit reserves the right to make changes to any products described herein and reserves the right to revise this document and to make changes from time to time in content hereof with no obligation to notify any person of revisions or changes Telit does not assume any liability arising out of the application or use of any product software or circuit described herein
34. The module will respond by powering down automatically without notice This form of power down is not recommended for regular use since the unexpected power loss may result in loss of data Low Power Mode The C24 incorporates an optional low power mode called Sleep Mode in which it operates in minimum functionality and therefore draws significantly less current During low power mode the C24 network connection is not lost C24 continues to monitor the CDMA network constantly for any incoming calls or data During low power mode all of the C24 interface signals are inactive and are kept in their previous state prior to activating low power mode To save power all the C24 internal clocks and circuits are shut down and therefore serial communications is limited Activating Low Power Mode By default the C24 powers on in Idle mode In this mode the C24 interfaces and features are functional and the module is fully active Low power mode is activated by the ATS24 command The value set by this command determines the inactive state duration required by C24 in seconds after which C24 will enter sleep mode For example ATS24 1 activates low power mode after 1 second of inactivity 3 5 2 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 ATS24 5 activates low power mode after 5 seconds of inactivity ATS24 0 disables low power mode default The following figure illustrates the ATS24 command operati
35. X current Table 3 4 C24 Current Ratings 3 4 Power On Off Operation When the C24 power supply is stable above the minimum operating level and C24 is powered off only the internal RTC timer is active The C24 power on and off process includes two primary phases which are indicated at the interface connector by the hardware output signals RESET_N and CTS_N The RESET_N signal indicates whether C24 is powered on or off When this signal is enabled low C24 is powered off When it is disabled high C24 is powered on The CTS_N signal indicates the serial communications interface UART status When this signal is high the C24 serial interface is disabled When it is low the serial interface is enabled and C24 is ready to communicate A IMPORTANT Do not operate the C24 out of its electrical or environmental limits Refer to the specifications chapter for details of these limits Turning the C24 On During a power on process C24 may toggle several interface signals which are visible to the application These signals do not represent any valid state or data and should be ignored by the customer application until completed Turning the C24 On Using ON_N The ON_N input signal is set high by an internal pull up resistor whenever a power supply is applied to C24 Therefore it is recommended to operate this signal using an open collector drain circuit connection Asserting the ON_N signal low for a minimum of 500 milliseconds
36. ace Description The following paragraphs describe in details the hardware requirements for properly interfacing and operating the C24 module 3 1 Architecture Overview The figure below illustrates the primary functional components of the C24 C24 block diagram E D d RE 5 Buflerl u1403 QSC 6055 U301 70 pin comnecior CNI401 Figure 3 1 C24 block Diagram 7 WA 4 E D Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved l Page 29 of 81 3 2 lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 The C24 consists of the following blocks Digital Block e Micro controller Unit MCU for system and user code execution e Digital Signal Processor DSP for voice and data processing e Serial communications interfaces e USB driver interface es UARTs e UIM card e Digital audio PCM bus interface e General purpose IO signals Analog Block e Power Management IC PMIC e Internal regulators e 1 external regulator for customer use e Analog audio interface management e Speaker microphone e Alert speaker e Headset e Real Time Clock RTC subsystem CDMA Transceiver Block e RF receiver e Signal processing IC for transmit and receive CDMA data e IC CELL PCS RX filter e IC Triplexer for CELL GPS PCS e IC CELL PCS duplexer e IC 1 575 GHz GPS Low Noise Amplifier with Integrated Filter e I
37. aronsari e E toast dE E ERE NUNG NGA 33 Table 3 5 UIM Interface Signals aan rirrieeroree iterna aei eeni e EAE eaa EEE EREE R REESS 44 Table 3 6 Handset Microphone Port Specifications eeeseesseseesseseeesesteesrsressrsrtsserrsstestnstesresteseneesereesseesteses 46 Table 3 7 Headset Microphone Port Specifications eeeeeseeeeeseereesesreesrsrissrtsrssresresreeresresserrrssresrestesresressestes 48 Table 3 8 Speaker Port SpecilicatLONS naaa a TAGALAN eiie aaea 50 Table 3 9 Alert Port RECH GERS nA RAANG KKK LUNA KANE R AER SES EEN 52 Table 3 10 Basic Mode Audio Paths AAA 54 Table 3 11 Advanced Mode Commands uk 54 Table 3 12 Speech Processing Features ee esesssecssecsseceseceecssecseeesssessneseseeeseeeaaecsaecsaeceaecsaeseseseseeeneeeseeeeaee 56 Table 3 13 Gain Control beatures cececcccesseeceseeeeseeeeaaeceeneeceaceeeaaeceeaaeceeneeceaeeeeaaecseaaeceeneecaeeseaaeeseaeeseeeeens 57 Table 3 14 Speaker Port Gains for Speech 37 Table 3 15 Microphone and Headset Microphone Port Gains 0 cccesessecssececeeceeeeceaeeaeeeeceaeeaeeeeeesecaeeeeenees 58 Mable le GEET 59 Table 3 17 e H EE 60 dable 3 18 Supply A D Specifications nanga YNANG AGAIN AKI GANG AGANE 60 Table 3 19 Controls and indicators G0 NUNG GNNENG GNNGG 00ANG GONSNGGNNEAGENAEGENANGGNNANGGNNEG00nasa0sassnwasssnwas0ona 61 Table 3 20 VREF Specifications asec an0 AN NGA NAN GGAIGA NAMA KAAD GRAN Aa 62 Table 3 21 GPS Receiver Specfteanons cee eeeeccesecsseeeees
38. by the host application through advanced programming options and a versatile AT commands set The C24 supports the following audio devices e Two single ended and biased analog microphone inputs for use in a variety of modes e Two differential analog speaker outputs for use in a variety of modes e A digital serial interface using PCM coding The following figure shows the audio interface topology DIN SE DOUT Digital PCM CLK FS Speaker Alert Speaker Microphone Headset Mic Figure 3 14 Audio Interface Topology 3 9 1 Handset Microphone Port The handset microphone port is the C24 power up default active audio input for voice calls It is located on pin 61 at the C24 interface connector named MIC It is designed as a single ended input and should be referenced to the C24 analog ground The microphone input includes all the necessary circuitry to support a direct connection to an external microphone device It incorporates an internal bias voltage of 1 8V through a 2 2kQ resistor and has an impedance of 1kQ The following figure shows the microphone circuit and the following table gives the microphone specifications Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 45 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 aa HDST_INT_N Figure 3 15 Handset Microphone Circuit IMPORTANT The microphone circuit desi
39. circuits before touching them Do not substitute parts or modify equipment Because of the danger of introducing additional hazards do not install substitute parts or perform any unauthorized modification of equipment Contact Telit Warranty and Repair for 1 13 7 114 1 1 14 2 1 14 2 1 1 14 2 1 1 D s it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 service and repair to ensure that safety features are maintained Dangerous procedure warnings Warnings such as the example below precede potentially dangerous procedures throughout this manual Instructions contained in the warnings must be followed You should also employ all other safety precautions that you deem necessary for the operation of the equipment in your operating environment Warning example WARNING Dangerous voltages capable of causing death are present in this equipment Use extreme caution when handling testing and adjusting Caring for the Environment The following information is provided to enable regulatory compliance with the European Union EU Directive 2002 96 EC Waste Electrical and Electronic Equipment WEEE when using Telit equipment in EU countries The finished host application should be marked with the crossed out wheelie bin mark at least 7mm high if it is within the scope of the WEEE directive Telit recommends that the system integrator seeks expert guidance as to the applicable directives for the fini
40. current consumed by C24 is directly affected by the VREF operation The C24 current consumption rises with respect to the current sourced through VREF it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 YCC z 500ms min S ON N d 150m8 Le VREF 200m j RESET_N Of Figure 3 23 VREF Power up Timing pe Basa ae Load 0 65 mv regulation mA Line 2 8 mV regulation Table 3 20 VREF Specifications 3 11 3 Wakeup Out Some applications incorporate their own power saving mode in which they operate with minimal functionality including disabling of interfaces and serial communications The wakeup out WKUPO_N signal is an active low output which is designed to support a low power mode feature in the host application This signal is used by C24 to indicate that it requires communicating with the host application through the serial interface due to an incoming call or data or an unsolicited event Applications that incorporate a low power mode should use this signal as an indication to switch from low power mode to normal operation and activate the serial interface it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 The wakeup out mechanism using the WKUPO N signal is controlled by 2 AT commands see following figure e ATS102 Defines the delay time in milliseconds that C24 will wait after asserting the WKUPO N signal low before sending data on the serial inter
41. d Ei Reproduction forbidde n without written authorization from Telit Communications S p A All Rights Reserved Page 59 of 81 3 10 2 3 11 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Maximum Input Voltage Measurement Voltage Table 3 17 GPAD Specifications Power Supply A D The main power supply VCC is constantly monitored internally by the C24 through a dedicated A D signal which is not accessible on the interface connector The measured VCC level can be read and monitored through the AT MMAD command which returns the measured VCC level in Volts times 100 For example a measured supply level of 3 65 Volts will be presented as 365 by the MMAD command Sampling Operating range 3 0 4 5 V Range Table 3 18 Supply A D Specifications Controls and Indicators Interface The C24 incorporates several interface signals for controlling and monitoring the module s operation The following paragraphs describe these signals and their operation The following table gives a description of the controls and indicators signals C24 system reset output indicator When high C24 is operating 2 80V regulated output Supplies external circuits up to 150mA Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 60 of 81 3 11 1 3 11 2 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Connector Pin Signal Name D
42. ecseeeseeeceaecaeeeeeesecaaeecesseceaesaeeecsaecaeeeeeeaeeaeeeeentes 65 Table 3 22 Antenna Interface Specifications ee eescesecssecsseceseceseeeseeeceeesaeecaeeesaecsaecsaecsaeenaeesseeeneeeeeeeneeeeaes 65 Table 4 1 Maximum Ratings 0 0 0 ceeeecsessesseeeseeeceeseecaecaecsaecssecssecseesseeesneesaeeeseeesaecaaecsaecaecsaeesseeeeeeeeeeseneesaee 66 Table 4 2 Environmental Ratings aa Nana ien Na sA NIKA DBA GANG Napa NAA 67 Table 4 3 Interface Specifications sescca NAPADAAN DAA TANA 73 Table 5 1 C24 Interface Connector Option 75 Table 5 2 Interface Connector Specficapons 76 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 List of figures Figure l l KE E 16 Figure 3 1 C24 block Diagram aa ABRA ERENNERT 29 Figure 3 2 ON N Power On Timing occ ccs ccicsccsccessenssccassevescnsonescaescaeessasinsnscesevease lisse cocvaseedactnvsestasealssudeostdesce 34 Figure 3 32 IGN Power Oni TIMING aa a GANANG NANG Desig Eaei NEEE Eni EE EDENE NERENS 34 Figure 3 4 ON_N Power Off Tmmng cceeceseeeccesecsceseeeeeesecaeeeseeseceaecseeseceaecaeeseessecuaeeaessecnaeeaeeneeaecaeeeneease 35 Figure 3 5 IGN Power Off Timing 00 c eee eseeeceseeseeeecesecseeeeeeseceaeeseeseceaecaeeeeeeaecsaeeceseeceaeeaeeeeeaesaeeeneeaeseaeeaees 36 Figure 3 6 ATS24 Operation eet eege kira ha 37 Figure 3 7 CTS Signal During Sleep Mode 38 Figure 3 8 WKUPI_N Signal Operapon eeeceeceseceseeeeeeeeseesseeeseecsaecsaecaecaecsaeesseeeseeeeeeseeeecaeeeae
43. eeaeeeaaeenaes 39 Figure 3 9 Serial Interface Data ana sovecasndesseideccaseedatcacadsueevtlsbecessuadeaiesdjscsnvasdenconelebevieveal wayeancebee 40 Figure 3 10 UART 1 Interface Senals A 41 Figure 3 11 UART2 Interface Signal Sessionis a Ing AN GANG NN AK AGUA aseessa 42 Figure 3 12 USB Interface SigialS isisisi anin eeina ANG GN GINANG GIBAIN ULAN ANGARA 42 Fig re 3 13 C24 UIM Unter face LL AGA DAG ALBANIA ANAKAN 43 Figure 3 14 Audio Interface TOpology Lasa ANA NA NAUNANG NANG HABAN AA KU KEEN EE 45 Figure 3 15 Handset Microphone EECH Seen a Eden INITAN NGI GB 46 Figure 3 106 Headset Microphone oemtt eet saan NAGA NAG AA NAAN AGA NAUGma aa 47 Figure 3 17 Differential Speaker Circuit a a ANNA NAB UDAN ANAL LAN K ANAKAN dakal 48 Figure 3 18 Single ended Speaker Circuit 49 Figure 3 19 Differential Loudspeaker Circuit c ccc eceeccesesseeeecesecsceeeeeseceeeeeeesecsaeeaeesecaecaeeeeeaecaeeeeeesesaeenees 51 Figure 3 20 Single ended Loudspeaker Cmreut ceecesceseceseceseeeeeeeseeeeeeseaeeeaeecaaecsaecsaecaecsaeesaeeseeeneeeseeeees 51 Figure 3 21 Voiceband Mode PCM Bus Coding Format cc ccesceeceseceseceseeeeeeeseeeaaeceaecsaecsaaecaeeseesseeseneeeas 53 Figure 3 22 Audio Programming Interface 55 Figure 3 23 VREF Power up TIMING kA GANG ces aena E a EE SR E E EEEE aN E EEEE 62 Figure 3 24 WKUPO N Operation sessir a NA IN e a Eed eN Naa E E EE EE ER EESE RA 63 Figure 5 1 C24 Mechanical Charactertetcs 74 Figure 5 2 C2
44. escription 26 WKUPO N Host application wake up signal indicator 41 ANT DET Antenna physical connection detect indicator Baa 28 30 32 34 36 General purpose IO signals for 38 40 42 customer use Table 3 19 Controls and indicators Reset The RESET_N output signal indicates the C24 s operating status This signal is set high after power up when C24 is operating It is set low when C24 is powered off When the RESET_N signal is low the C24 interface signals are disabled and do not represent any valid data or state Furthermore any input signals connected to the C24 interface must be disabled tri state or set low when RESET_N is low VREF Reference Regulator The C24 incorporates a regulated voltage output VREF The regulator provides a 2 8V output for use by the customer application This regulator can source up to 150 mA of current to power any external digital circuits When the C24 is in low power mode Sleep mode the VREF regulator is also in a low power state In this state the VREF regulated output is limited to providing only 1mA of current maximum while maintaining the 2 75V output level When C24 is in Idle mode or wakes up temporarily from low power mode the VREF regulator returns to full operation supplying up to 150mA IMPORTANT The VREF regulator is powered from the C24 s main power supply and therefore any current sourced through this regulator originates from the C24 VCC supply The overall VCC
45. et and headset audio paths during operation and call handling IMPORTANT The HDST INT N signal does not operate in advanced audio mode This signal s functionality is overridden by the AT MAPATH command settings Alert Loudspeaker Port The alert loudspeaker is the default C24 power up ringer It is used for but not limited to sounding the C24 alerts melodies and rings It is located at pins 63 and 65 on the C24 interface connector named ALRT N and ALRT P respectively It is designed with an internal amplifier supplied directly from VCC which supplies 0 5W to the audio device It may also be used as a single ended output referenced to the C24 analog ground The following figure and table show the alert loudspeaker circuit and the loudspeaker specifications Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 50 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Figure 3 19 Differential Loudspeaker Circuit A IMPORTANT For safety regulations it is important to place series resistors on the alert output lines as illustrated in the preceding figure The resistors value should be R 0Q at the design stage but may be changed to a different value during audio safety testing in case that alert level limitation is required Figure 3 20 Single ended Loudspeaker Circuit Reproduction forbidden without written authorization from Tel
46. f the equipment Telit Inc assumes no liability for the customer s failure to comply with these requirements The safety precautions listed below represent warnings of certain dangers of which we are aware You as the user of this product should follow these warnings and all other safety precautions necessary for the safe operation of the equipment in your operating environment Ground the instrument Only suitably qualified individuals should work on the product and host system Consideration should be given to the safest grounding arrangement for the host application Do not operate in an explosive atmosphere Do not operate the equipment in the presence of flammable gases or fumes Operation of any electrical equipment in such an environment constitutes a definite safety hazard Do not service or adjust alone Do not attempt internal service or adjustment unless another person capable of rendering first aid is present There are no user serviceable parts inside the C24 module Keep away from live circuits Operating personnel must e not remove equipment covers Only Factory Authorized Service Personnel or other qualified maintenance personnel may remove equipment covers for internal subassembly or component replacement or any internal adjustment e not replace components with power cable connected Under certain conditions dangerous voltages may exist even with the power cable removed e always disconnect power and discharge
47. face This delay is required to allow the application enough time to reactivate from low power mode and switch to normal mode If ATS102 0 which is the default value the WKUPO N signal and mechanism is disabled In case the serial interface incorporates hardware flow control signals the data will be sent according to their state after the ATS102 delay time has expired e ATS100 Defines the application minimal wakeup duration in seconds for a single wakeup event This time definition is required to avoid frequent unnecessary wakeup events and consequent ATS102 delays The application may return to low power mode after the serial interface has been inactive for the duration set by ATS100 This duration is measured from the last data sent or received on the serial interface r a ATS102 ATS100 cb Application na RXD_N x X X A Figure 3 24 WKUPO N Operation WKUPO N The following guidelines apply to the wakeup out mechanism e C24 will set the WKUPO N signal low to indicate that in has data to send through the serial interface e C24 will start sending the data to the application after the delay defined by ATS102 e The WKUPO N signal will remain low while data is being sent to the host application e The host application should keep its serial interface active and not switch to low power mode while the WKUPO N signal is low e C24 will set the WKUPO N signal high when it has completed send
48. g Modes Power Supply The C24 power supply must be a single external DC voltage source of 3 3V to 4 2V The power supply must be able to sustain the voltage level during a transmit current surge which may reach 600 mA The C24 interface connector has 8 contacts for the main power supply as described in the following table All these contacts must be used for proper operation Signal Name GND Description Main ground connection for C24 module DC supply input for C24 module Vin 3 3 V to 4 2 V Irkus 600 mA during transmission Table 3 2 Power Supply Signals D s Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved kayoo Page 31 of 81 3 3 1 3 3 2 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Power Supply Design Special care must be taken when designing the power supply of the C24 The single external DC power source indirectly supplies all the digital and analog interfaces but also directly supplies the RF power amplifier PA Therefore any degradation in the power supply performance due to losses noises or transients will directly affect the C24 performance It is recommended that any voltage drops during transmission will not exceed 300mV measured on the C24 interface connector In any case the C24 supply input must not drop below the minimum operating level during transmission Dropping below the minimum
49. gn depends on the type of microphone device A series capacitor is required in case a passive microphone is used or the application provides a separate bias voltage to an active microphone circuit The internal C24 biasing circuit may also be used with an active microphone which corresponds to the microphone port specifications Programmable by AT Command AC Input Freq 1Khz 1 kQ Impedance Bias voltage Rpras 2 2 KQ 1 8 V Ip ass 1 MA Table 3 6 Handset Microphone Port Specifications 3 9 2 Headset Microphone Port The headset microphone port is designed for use with but not limited to a headset audio device It is located at pin 57 on the C24 interface connector named HDST_MIC ka E Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 46 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 It is designed as a single ended input and should be referenced to the C24 analog ground The microphone input includes all the necessary circuitry to support a direct connection to a headset microphone device It incorporates an internal bias voltage of 1 8V through a 2 2kQ resistor and has an impedance of 1kQ The following figure shows the microphone circuit and the following table gives the microphone specifications HOST MIC SEH HDST INT N Figure 3 16 Headset Microphone circuit A IMPORTANT The headset microphone circuit design de
50. gorithms Echo suppression noise suppression and sidetone AT MAVOL Sets the gain amplification level of the selected analog output device AT MMICG Sets the gain amplification level of the selected analog input device AT MADIGITAL Switches between analog and digital audio paths Table 3 11 Advanced Mode Commands it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 3 9 8 Audio Programming Interface The C24 incorporates a unique audio programming interface through AT commands which controls the following audio features e Audio Path Defines the input and output devices for speech DTMF tones rings and alerts e Audio Gain Defines the amplification gain level for input and output audio devices e Audio Algorithm Defines the speech processing features for voice calls The following figure describes the audio programming interface options which are defined by AT commands Path Gain Processing Handset Speaker Echo cancellation ini Headset Microphone Noise Suppression Digital PCM Digital Alert Sidetone Advanced Advanced Speaker Alert Speaker HOST JINT IN en Microphone Headset Mic Basic Mode Basic Mode Basic Mode HOST ININ ATCL VE ATS4 ATSVE Advanced Mode AMER SL Advanced Mode A Pit Bt TH Advanced Mode ATMAFEAT ATMADISITAL A dd tL ATHA AICE Figure 3 22 Audio Programming Interface 3 9 8 1 Audio Algorithms The C24 audio interface features
51. http www telit com en products technical support center contact ph For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit http www telit com To register for product news and announcements or for product questions contact Telit Technical Support Center TTSC Our aim is to make this guide as helpful as possible Keep us informed of your comments and suggestions for improvements Telit appreciates feedback from the users of our information 1 4 Required Query Information Every new call problem report directly from a Direct Customer or from a distributor should be directed to the help desk email address noted above in the precious paragraph It is recommended to report each individual issue in a separate email The following information is required when reporting a problem e Customer name and address e Customer contact information for this request including Name Telephone Fax number Mobile number Email address e Product name C24 e Software version of the unit ATIS command or model number e PCB version located on the PCB near the RF connector e Severity of the problem e Problem description including Operator name Type of SIM card for example Test Pre paid or 5v 3v 1 8v Setup Configuration such as Developer Board handset host connections and so on Detailed scenario from startup Log of all the comma
52. ically return to low power mode according to the ATS24 settings Depending on the type of network indication and the application settings C24 may operate in several methods which are configurable by AT commands to alert the application of the incoming data e Enable the WKUPO N signal to wake up the application from low power e Send data to the application over the serial interface e Enable the serial interface s Ring Indicator RI N signal Data on the Serial interface While C24 is temporarily awake in Idle mode data may be transmitted on the serial interface In case data is being transmitted in any direction C24 will not return to low power mode This is regardless of the original wake up reason or source C24 will remain awake while data is transferred Only when the serial interface transfer is completed and the data has been processed C24 will return to low power mode automatically according to the ATS24 settings see following figure it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 ATS24 C24 Mode d ldle Disabled N l CTS_N N Enabled d TXD_N or RXD N Figure 3 9 Serial Interface Data 3 5 5 3 Permanent Termination of Low Power Mode The C24 low power mode is enabled and disabled by the ATS24 command To permanently terminate the C24 low power mode the ATS24 0 command must be used Setting ATS24 0 disables the currently active low power mode and switches
53. ing the data e The application serial interface must stay active and not switch to low power mode for the duration set by ATS100 after WKUPO N is set high e C24 will not set the WKUPO N signal low if it needs to send additional data during the ATS100 delay time e The application may switch to low power mode after the WKUPO N signal is set high and the serial interface has been inactive for the duration set by ATS100 3 11 4 3 11 5 3 11 6 3 11 7 3 12 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Antenna Detection The C24 incorporates an internal antenna detection circuit which senses the physical connection and removal of an antenna or antenna circuit on the C24 antenna connector The antenna detection state is reported to the application through the ANT DET output signal and may also be queried by the ATS97 command The detection circuit senses DC resistance to ground on the C24 antenna connector A DC resistance below 100kohm 1090 is defined as a valid antenna connection and the ANT DET output signal is set high CDMA Network Indicator The CDMA output signal indicates the network CDMA connection status When C24 is connected to a CDMA network this signal is enabled When C24 is not connected to the CDMA network this signal is disabled Transmission Indicator The TXEN N output signal indicates when C24 is transmitting over the CDMA network This signal is set low during transmissi
54. ission Safety Precautions 1 11 1 User Operation The C24 module is normally supplied without an antenna and is compliant with SAR requirements provided the following conditions are observed Do not operate your unit when a person is within 8 inches 20 centimeters of the antenna A person or object within 8 inches 20 centimeters of the antenna could impair call quality and may cause the phone to operate at a higher power level than necessary i NG E 7 SC lt r d n emeng Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 18 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 IMPORTANT The unit must be installed in a manner that provides a minimum separation distance of 20 cm or more between the antenna and persons and must not be co located or operate in conjunction with any other antenna or transmitter to satisfy FCC RF exposure requirements for mobile transmitting devices To comply with the FCC RF exposure limits and satisfy the categorical exclusion requirements for mobile transmitters the requirements described in the following section must be met 1 11 2 Antenna Installation e The antenna installation must provide a minimum separation distance of 20 cm from users and nearby persons and must not be co located or operating in conjunction with any other antenna or transmitter e The combined cable loss and antenna gain must
55. it Communications S p A All Rights Reserved Page 51 of 81 3 9 6 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 IMPORTANT When implementing a single ended loudspeaker design it is required to place a series capacitor and resistor on the alert output line as illustrated in the preceding figure The capacitor should be of low tolerance with values of C 10 22 uF The resistor value should be R 0Q at the design stage but may be changed to a different value during audio safety testing in case that alert level limitation is required Conditions Output No load Voltage Programmable by AT Command AC Output Impedance Table 3 9 Alert Port Specifications Digital Audio Interface The C24 digital audio interface is a serial Pulse Code Modulation PCM bus which uses linear 2 s compliment coding C24 is the PCM bus master supplying the clock and sync signals to the application The C24 digital interface is a 4 signal PCM bus which includes a bit clock output signal for Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 52 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 the bus timing a frame sync output signal for audio sampling timing and serial data input and output signals The PCM bus signal s configuration is e PCM CLK 2048 kHz serial clock e PCM FS 8 kHz bit wide frame sync e PCM DOUT 13 bi
56. main power supply lines and antenna but also indirectly penetrate the internal application s supplies and signals The noises are transferred into the C24 s audio circuits through the microphone input signals and then are amplified by the C24 s internal audio amplifiers To minimize the audio noise and improve the audio performance the microphone and speaker signals must be designed with sufficient protection from surrounding noises The following guidelines should be followed to achieve best audio performance e Reference the microphone amp speaker circuits to the C24 AGND interface signal e Keep the audio circuits away from the antenna e Use RF filtering capacitors on the audio signals as described in table 3 3 Recommended Power Supply Filtering e The audio signals should not be routed adjacent to digital signals e Isolate the audio signals by a surrounding ground plane or shields e Filter internal supplies and signals that may indirectly affect the audio circuits from noises and voltage drops Analog Ground The C24 interface incorporates a dedicated analog ground contact AGND pin 59 which is it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 internally connected to the C24 s ground The AGND signal is intended to provide a separate ground connection for the application s external audio devices and circuits This signal provides an isolated ground connection directly from C24 which is separated from the n
57. milar statement placed in a prominent location in the text of the manual lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 NOTE This equipment has been tested and found to comply with the limits for a Class B digital device pursuant to Part 15 of the FCC Rules These limits are designed to provide reasonable protection against harmful interference in a residential installation This equipment generates uses and can radiate radio frequency energy and if not installed and used in accordance with the instructions may cause harmful interference to radio communications However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be determined by turning the equipment off and on the user is encouraged to try to correct the interference by one or more of the following measures Reorient or relocate the receiving antenna Increase the separation between the equipment and receiver Connect the equipment into an outlet on a circuit different from that to which the receiver is connected Consult the dealer or an experienced radio T V technician for help gee BG Mi Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 28 of 81 lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 3 Hardware Interf
58. n authorization from Telit Communications S p A All A Reserved Page 4 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Usage and Disclosure Restrictions License Agreements The software described in this document is the property of Telit and its licensors It is furnished by express license agreement only and may be used only in accordance with the terms of such an agreement Copyrighted Materials Software and documentation are copyrighted materials Making unauthorized copies is prohibited by law No part of the software or documentation may be reproduced transmitted transcribed stored in a retrieval system or translated into any language or computer language in any form or by any means without prior written permission of Telit High Risk Materials Components units or third party products used in the product described herein are NOT fault tolerant and are NOT designed manufactured or intended for use as on line control equipment in the following hazardous environments requiring fail safe controls the operation of Nuclear Facilities Aircraft Navigation or Aircraft Communication Systems Air Traffic Control Life Support or Weapons Systems High Risk Activities Telit and its supplier s specifically disclaim any expressed or implied warranty of fitness for such High Risk Activities Trademarks TELIT and the Stylized T Logo are registered in the US Patent amp Trademark Office All other product or
59. nals that are not used by the customer application must be left unconnected C24 incorporates the necessary internal circuitry to keep unconnected signal in their default state Do not connect any components to or apply any voltage on signals that are not used by the application Signals that are defined as Do Not Use or DNU must remain externally unconnected in any case These signals are reserved for future use 8 PAPA Active Internal Signal Name Description I O H L PU PD Parameter HEEN Typ Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 68 of 81 Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 F GP Active Internal sep pina saa eer PU PD Control 27 Reference VREF regulator Nor Tours 150 mA output C24 wakeup input 4 Vin Vit 2 6 n i H 0 7 VCC VCC Iour lt 22 uA WKUPI N 100K PU Host wakeup output Lu Reset signal output 100K PD 100K PU Transmit indicator Antenna ANT DET presence indicator GPRS GPRS coverage indicator El TXD2 N UART2 TXD a L D RXD2_N UART2 RXD o RTS2_N UART2 RTS HE 100K PU TXEN N 100K PU o m 6 D E D D a an La d N lt lt lt lt lt lt lt lt Kna ole e oe fee 0 2 8 2 8 0 2 8 0 2 8 0 VCC 2 8 0 2 8 0 2 8 gt g g g g gt g g 100K PU L Telit C24 Hardware User Guide 1VV0300920 Rev 1 201
60. nd prolongs battery life Product Specifications IMPORTANT For safety regulations and requirements see Regulatory Requirements Safety Statement and Requirements and Antenna and Transmission Safety Precautions in Preface NOTE Telit reserves the right to change the specifications without prior notice Lt S e kayoo Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 23 of 81 wireless solutions C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 DP Reproduetion forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 24 of 81 wireless solutions C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 DP Reproduetion forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 25 of 81 wireless solutions C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Table 2 1 Product Specifications Repraduetan forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 26 of 81 Zaks 2 3 As it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Certifications Approvals The C24 module has been tested and certified compliance to the following standards e CTIA CDG1 e IOT CDG2 e F911 TTY e Spirent UTS Driver Regulatory Approvals The C24 m
61. nds and the responses beginning from startup e Answers to the following questions Was the same scenario tested on the Developer Board and the PC to reproduce the problem How many units do you have and how many of them have this problem How often does the problem recur In addition to the information requested above send the following AT commands and the HyperTerminal log with the responses e AT CMEE 2 to get textual error message e AT CPIN to get SIM card status e AT CREG to see if the TXVR is registered to the network es AT CSQ to get the signal strength RX level Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 14 of 81 1 5 1 5 1 Telit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 es AT CGSN to read the IMEI number of the unit es ATB to get the software version of the TXVR es ATIS to get the setting of basic AT commands e AT CMER 0 0 1 1 to get messages and indicators from the handset display to the DTE Testing a Standalone Unit This section describes how to perform a C24 functionality test whose purpose is to e Introduce the user to the C24 e Explain how to work with the C24 unit e Describe how to evaluate basic C24 features The test setup provides a wide platform through which a C24 unit can be evaluated The specific test procedure described below covers only a few of the C24 s many featu
62. ntial speaker circuit and a single ended speaker circuit and the following table gives the speaker specifications Figure 3 17 Differential Speaker Circuit ry 2 emm Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 48 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 IMPORTANT For safety regulations it is important to place series resistors on the speaker output lines as illustrated in the preceding figure The resistors value should be R 0Q at the design stage but may be changed to a different value during audio safety testing in case speaker level limitation is required Figure 3 18 Single ended Speaker Circuit IMPORTANT When implementing a single ended speaker design it is required to place a series capacitor and resistor on the speaker output line as illustrated in Figure 2 18 The capacitor should be of low tolerance with values of C 10 22 uF The resistor value depends on the speaker application For a handset device the resistor value should be R 0Q at the design stage but may be changed to a different value during audio safety testing in case speaker level limitation is required For a headset device safety regulations require the resistors value to be R gt 2RLQ where RL is the speaker impedance e g 32Q For example when using a 32Q speaker the series resistance would be R gt 640
63. odule has been tested and approved under the standards and regulations listed below e FCC part 15 22 24 e JC IMPORTANT The following paragraphs must be addressed by the integrator to ensure their host is in compliance to the C24 FCC grant and or the FCC grant of the host device CFR 47 Part 15 19 specifies label requirements The following text may be on the product user s manual or container This device complies with Part 15 of the FCC Rules Operation is subject to the following two conditions 1 this device may not cause harmful interference and 2 this device must accept any interference received including interference that may cause undesired operation CFR 47 Part 15 21 Information to user The user s manual or instruction manual for an intentional or unintentional radiator shall caution the user that changes or modifications not expressly approved by the party responsible for compliance could void the user s authority to operate the equipment In cases where the manual is provided only in a form other than paper such as on a computer disk or over the Internet the information required by this section may be included in the manual in that alternative form provided the user can reasonably be expected to have the capability to access information in that form CFR 47 Part 15 105 Information to the user b For a Class B digital device or peripheral the instructions furnished the user shall include the following or si
64. oisy digital ground of the application It is recommended to connect this signal to analog audio devices and circuits used by the application Using a separate analog ground minimizes audio noises and improves the audio circuit s immunity from external interferences 3 10 A D Interface The C24 includes 4 Analog to Digital Converter ADC signals with 8 bit resolution for environmental and electrical measurements The ADC signals measure an analog DC voltage level on their inputs which is converted to an 8 bit digital value for further processing by C24 or the user application The A D signals operation and reporting mechanism is defined by the AT MMAD command The table below lists the internal and external A D signals provided by C24 Table 3 16 A D Signals 3 10 1 General Purpose A D The C24 provides 3 general purpose A D GPAD signals for customer application use Each A D signal can monitor a separate external voltage and report its measured level independently to the application through the AT command interface The GPAD signals measure a DC voltage level of 0 1 2 5 V which is converted internally to a 8 bit digital value The user application can monitor the A D voltage level through the AT MMAD command which returns the measured DC level in Volts times 100 For example a measured analog DC level of 1 75 Volts will be presented as 175 by the MMAD command The following table gives the GPAD specifications ang
65. on ATS24 kam Sleep i C24 Mode i f Idle Disabled l CTS N Enabled TXD Nor RXD_N x x y Figure 3 6 ATS24 Operation IMPORTANT C24 will not enter low power mode in any case when there is data present on the serial interface or incoming from the network or an internal system task is running Only when processing of any external or internal system task has completed and C24 is inactive for the duration of ATS24 it will enter low power mode Serial Interface During Low Power Mode During low power mode the C24 serial interfaces are disabled This is indicated by the CTS signal high state The C24 wakes up periodically from low power mode to page the network for any incoming calls or data After this short paging is completed C24 returns to low power mode During this short awake period the serial interfaces are enabled and communications with the module is possible The CTS N signal is alternately enabled and disabled synchronously with the network paging cycle CTS N is enabled whenever C24 awakes to page the network This indicates the C24 serial interfaces are active see following figure mg SC fo Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 37 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 I C24 Mode Se f Mg Nm NA Enabled l Figure 3 7 CTS Signal During Slee
66. on and set high when no transmission is in progress General Purpose 0 The C24 incorporates 8 general purpose IO signals for the user application Each GPIO signal may be configured and controlled by AT command These signals may be used to control or set external application circuits or to receive indications from the external application GPS Interface The C24 s integrated GPS receiver can provide location and position information based on the Global Positioning System satellites The GPS interface supports the following modes of operation e Autonomous In this mode the GPS receiver operates stand alone regardless of CDMA network availability The C24 searches and detects available satellites and calculates the positioning information on its own e Assisted In this mode the C24 operates in conjunction with the CDMA network to search for satellites and calculate the positioning data e MS Assisted The calculation is performed by the network and the position is send to the C24 device e MS Based C24 receive initial satellites information form the network and calculatse the position by itself Number of satellites 2D When the GPS receiver is using three satellites to determine a position solution 3D When the GPS receiver is using four or more satellites to determine a position solution and the accurate time Serial Configuration The C24 has two modes of data Binary and NMEA Binary Mode is reported through UART1 or USB
67. ort a broad range of applications e A powerful audio interface e A large set of indicators and control signals e Several advanced power saving modes e A variety of serial communications solutions All these features and interfaces are easily controlled and configured using a versatile AT command interface that provides full control over the C24 operation The C24 control and indication interface extends its capabilities beyond CDMA communications This includes an A D and GPIO interface and a regulated output voltage for supplying external circuits With these interfaces the C24 can operate and control external applications and receive feedback from external environment and circuits The integrated GPS receiver supports autonomous and assisted modes of operation for a reliable and immediate location determination The location information is provided in NMEA format or by AT commands which provides the application flexible design The C24 interface design using a single 70 pin board to board connector through which all application interfaces are managed facilitates fast and easy integration It significantly shortens the development process and minimizes the product s time to market The C24 is extremely compact in size with a slim mechanical design which makes it space saving on the application board and easily fitted into any board design The advanced power supply management significantly reduces power consumption to a necessary minimum a
68. p Mode The periodical enabling and disabling of the CTS_N signal during low power mode can be controlled by the AT MSCTS command Setting AT MSCTS 1 permanently disables the serial interface during low power mode even during a network page by C24 The CTS_N signal is disabled and therefore the serial interfaces are blocked 3 5 3 Terminating Low Power Mode Terminating the low power mode or wake up is defined as the transition of the C24 operating state from Sleep mode to Idle mode There are several ways to wake up C24 from low power mode as described below A IMPORTANT During power saving mode the C24 internal clocks and circuits are disabled in order to minimize power consumption When terminating the power saving mode and switching to Idle mode C24 requires a minimal delay time to reactivate and stabilize its internal circuits before it can respond to application data This delay is typically of 15 milliseconds and is also indicated by the CTS_N signal inactive high state The delay guarantees that data on the serial interface is not lost or misinterpreted 3 5 4 Temporary Termination of Low Power Mode Temporary termination of low power mode occurs when C24 switches from Sleep mode to Idle mode for a defined period and then returns automatically to Sleep mode Low power mode may be terminated temporarily by several sources some of which are user initiated and others are initiated by the system 3 5 5 Using the WKUPI_
69. pends on the type of microphone device A series capacitor is required in case a passive microphone is used or the application provides a separate bias voltage to an active microphone circuit The internal C24 biasing circuit may also be used with an active microphone which corresponds to the headset microphone port specifications Parameter Conditions Min Typ Max Unit Input Voltage No load 1 6 Wap Gain Programmable by 9 36 dB AT Command i d ei a D KL LN j d r lt n Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 47 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Parameter Conditions Min Typ Max Unit AC Input Freq 1Khz 1 kQ Impedance Bias voltage Rgras 2 2 KQ 1 8 V Ibias lt 1 mA Bias Current 1 mA Table 3 7 Headset Microphone Port Specifications 3 9 3 Speaker Port The analog speaker port is the C24 power up default active output for voice calls and DTMF tones It is located at pins 67 and 69 on the C24 interface connector named SPKR_N and SPKR P respectively It is designed as a differential output with 3222 impedance but may also be used as a single ended output referenced to the C24 analog ground The speaker output is used for both the handset and the headset audio paths The following figures show a differe
70. rd and care must be taken to avoid any damage The following figure depicts the C24 mounting area Restricted Area Ground Pad Figure 5 8 C24 Mounting Area The holes are used for mechanical mounting of C24 to the application board but also for grounding support Using conductive elements to install C24 significantly improves the overall grounding of the module and therefore improves the C24 performance and stability It is required to use screws or other mechanical elements to fasten C24 to the application board but it is highly recommended to use conductive elements to improve the module s performance Na tag Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 79 of 81 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 6 Acronyms and abbreviations AMR Adaptive Multi Rate AOC Advice of Charge BR Baud Rate bps Bits Per Second CSD Circuit Switched Data CTS Clear to Send DCD Data Carrier Detect DCE Data Communication Equipment such as modems DCS Digital Cellular System GSM in the 1800MHz band DOC Department of Communications Canada DRX Discontinuos Reception DSP Digital Signal Processor DSR Data Set Ready DTE Data Terminal Equipment such as terminals PCs and so on DTMF Dual Tone MultiFrequency DTR Data Terminal Ready DTX Discontinuos Transmission EFR Enhanced
71. res Using this setup you can perform several additional tests on the C24 The test is performed using two modems one of which is the C24 The modems communicate with each other through a single computer which also controls their operation The test requires knowledge about the operation of the C24 Developer s Kit terminal applications and AT commands Refer to relevant documentation for assistance To perform the test you need the following e A C24 OEM cellular engine unit e A C24 Developer s Kit e A desktop or laptop computer which includes A free serial communications port RS232 A connected and active line modem internal or external A terminal application such as HyperTerminal Test Setup To Setup the C24 Test Follow this procedure following procedure to set up your equipment before performing the test 1 Verify that the computer you intend to use for the test is equipped with a working line modem You can use a second C24 unit instead of the line modem When doing so you must repeat the setup procedure that follows for the additional C24 2 Set up the C24 and the Developer Board as described in Initial Setup in Developer Board and Interfaces Description in the C24 Developer s Kit document 3 Verify that the C24 has adequate reception from the local network 4 Connect the Developer Board s RS232 port to the computer s serial port 5 Open a terminal application window such as
72. rough the UART1 interface e FW programming e Data logging for application debug e Output of GPS location data in Binary and NMEA format The USB interface signals are shown in the following figure 10 VBUS C24 12 DP USB 14 DN DEVICE it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 3 8 UIM Interface The C24 incorporates a UIM interface which conforms to the ISO IEC 7816 standard which defines the electrical signaling and protocol specifications of a UIM card C24 does not incorporate an on board UIM card tray for UIM placement The UIM must be located on the user application board external to the C24 The C24 UIM interface includes all the necessary signals which are routed to the interface connector for a direct and complete connection to an external UIM C24 supports dynamic detection of the UIM card through a dedicated UIM detection signal C24 will detect a UIM card insertion or removal upon power up or during operation by the transitions on the UIM_PD_N signal A IMPORTANT The UIM interface can t be operated together with the UART2 interface Both interfaces share the same internal HW port Therefore applications using the UIM interface must not connect any external devices to the UART2 interface and vise versa 3 8 1 UIM Connection The following figure illustrates a typical UIM interface connection to C24 This connection type is implemented on the C24 Developer Board using an FCI SIM tray
73. s interfaces UART audio etc and closing the network connection The following figure illustrates the power off timings when using the ON_N signal YCC a 2000ms min el ON N d 1500ms 1000ms CTS N 2500ms RESET_N Figure 3 4 ON_N Power Off Timing 3 4 2 2 Turning the C24 Off Using IGN The IGN signal may be used to power off C24 only if it was also used to power it on When the IGN signal is set low C24 will turn off This will initiate a normal power off process which includes disabling of all applications interfaces UART audio etc and closing the network connection The IGN signal will not power off C24 before 30 seconds have elapsed since C24 was powered on This delay mechanism is implemented to protect C24 from unexpected transients on the IGN line during power up The following figure illustrates the power off timings when using the IGN signal 3 4 3 3 4 4 3 5 3 5 1 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 VCC IGN L 2000ms 1000ms CTS N I 3000ms RESET_N Figure 3 5 IGN Power Off Timing Turning the C24 Off Using AT MRST The AT MRST command initiates a C24 system reset operation which powers off the C24 This command emulates the ON_N signal operation for power off Power Loss shut down A low power shut down occurs when C24 senses the external power supply is below the minimal operating limit
74. service names are the property of their respective owners Copyright Telit it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Contents 1 Do lao ila dLL APAPAP 13 SN DEE 13 w2 Audience ae E E re errr rr rrroer 13 1 3 Contact Information SUpport AA AA 13 1 4 Required Query Information aa ANA AA 14 1 5 Testing EEN ENEE EEN 15 L t Test et sees edel a Pahabaan 15 1 5 2 TestProcedUr ana aaa dee ee GINANG 16 1 6 Document Organization maa KAI KABAGABAGAN 17 Ur e Ee E a AABANGAN AIN AN AGAD 17 1 8 Related DO to EE 17 1 9 Regulatory E Me 17 1 10 Safety Statement and Reouremente 18 1 11 Antenna and Transmission Safety Hrecautions na naaanananaawawaaaaananasasasasasana 18 lila USEF ale e E 18 HS Antenna lnstallaTomaaa AN GANAN ANNA NUN AB ah 19 lala SA DE 19 1 13 General Safety E 20 1 13 1 Remember safety depends on voul eenen 20 LZ Ground theINSIFUMENI naa NAKA NANANA ea eae S GANA AKA 20 1 13 3 Do not operate in an explosive atmosphere nanana nanananaaaanaaaaaannnsssssasnnaaaaannnnssans 20 1 13 4 Do not service or adjust alone nanana nanana GNG NAA AANNNGNGNGGNNN NANA NANGNGGk00 kna ana aannnnnnnn 20 1 13 5 Keep away from live cireuite AA AANNNGNNNGENNNN ANA NANN KGG kkk knna Aa annnnnnn 20 1 13 6 Do not substitute parts or modify egutpment aa aaannssans 20 1 13 7 Dangerous procedure Warnings cccccccceeceeeeeeeeeeeeeeeeceenceeeeeeeeesccennaaeeeeeeeesssesssneeeeeees 21 1 14 Caring for the
75. shed product Disposal of Telit equipment in EU countries Please do not dispose of Telit C24 in landfill sites In the EU Telit in conjunction with a recycling partner will ensure that C24 is collected and recycled according to the requirements of EU environmental law Note that the system integrator will be liable for recovery and disposal of the integrated system Please contact the Telit Technical Support Center TTSC for assistance The telephone numbers are listed at http www telit com Alternatively if you do not have access to TTSC or the internet contact the Local Telit Office Disposal of Telit equipment in non EU countries In non EU countries dispose of Telit equipment in accordance with national and regional regulations Turkey RoHS Compliance ka ti gee re LL g f J f Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 21 of 81 114 2 1 2 lit C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 The C24 product meets the European Union directive for RoHS compliance The RoHS compliance is subject to a declaration of conformity that may be viewed upon request CMM Compliance The disclosure table and symbols below are provided in accordance with Section 5 amp 6 of the People s Republic of China s Electronic Industry Marking Standard for Control of Pollution Caused by Electronic Information Products The disclosure
76. t linear audio data output e PCM DIN 13 bit linear audio data input The analog audio is sampled at an 8 kHz rate and converted to linear 13 bit serial PCM audio data The serial data is transferred on the PCM bus in 16 bit word format which includes 13 sampled data bits and 3 added zero value bits The 16 bit serial data is transferred in both directions after each sync signal s falling edge The sync signal pulse duration is one clock period after which the serial data is transferred in both directions for 16 consecutive clock periods Following the 16 bit data transfer the serial input and output data signals inactivate until the next sync pulse which occurs every 125 uS 8 kHz It is recommended the serial data signals will be High Z during the inactive period The following figure illustrates the PCM bus format of the voiceband audio configuration PCM FS PCM_CLK ULL Pow pour re PPP PP PEEP PPA E ponon CSSF SZ Figure 3 21 Voiceband Mode PCM Bus Coding Format 3 9 7 Operating Modes The C24 audio interface includes 2 modes of operation Each operating mode defines the audio input and output devices to be used for each audio sound type and their programmable settings 3 9 7 1 Basic Mode Basic mode is the C24 default power up audio configuration Several audio paths are available in this mode and their settings can be programmed through the AT command set The following table describes the available audio paths in
77. table and symbols shown below cover the electronic information product EIP supplied HA Hy RIC BEHEER Bal ZS ors ERKE S Ce BABA SORE AMER AS GE Pa S EEST 11363 2006 RECREATE x R IBA BA SORE DE BRAK HS PA BB SIT 11363 2006 ARTE ARSE A PR ER The two symbols shown below indicate the product is recyclable and the number denotes the Environmental Friendly Use Period for the EIP indicated above it Transceiver Module amp Accessories Battery Except Daly Reproduction forbidden without written authorization from Telit Communications S p A All A n Page 22 of 81 2 1 m it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 General Product Description The C24 is the newest member of Telit s embedded cellular modules family Designed with dual band CDMA operation embedded GPS receiver and with 1x Data capabilities C24 can operate on any CDMA 1x network to provide voice and data communications and positioning information The C24 is similar to a condensed cellular phone core which can be integrated into any system or product that needs to transfer voice or data information over a cellular network Thus it significantly enhances the system s capabilities transforming it from a standalone isolated product to a powerful high performance system with global communications capabilities The C24 is designed as a complete CDMA communications solution with all the controls interfaces and features to supp
78. te Secondary UART UART2 The secondary UART is a 4 signal interface which only provides data and flow control signals The secondary UART is used to communicate GPS data in NMEA format The UART signals are active low CMOS level signals For standard RS232 communications with a PC an external transceiver is required C24 is defined as a DCE device and the user application is defined as the DTE device These definitions apply for the UART signals naming conventions and the direction of data flow as described in the following figure 3 7 3 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 TXD DTE RXD UART RIS STE Figure 3 11 UART2 Interface Signals The UART default port configuration is 8 data bits 1 stop bit and no parity with hardware flow control and 115200 baud rate IMPORTANT The UART interface can t be operated together with the UIM Card interface Both interfaces share the same internal HW port Therefore applications using the UART2 interface must not connect any external devices to the UIM Card interface and vice versa USB Interface C24 incorporates a standard Universal Serial Bus USB interface The C24 USB electrical interface and protocol conform to the USB 2 0 full speed specifications C24 is defined as a USB device on the USB bus and does not support hub or host functionality The USB interface provides the following services e Standard communications with C24 as done th
79. terminal or mobile incorporating the C24 module The integrator is advised to consider the following general cautions in the context of their integrated system incorporating the C24 module and to provide the end user with the applicable warnings and advice of safe operation of the equipment Failure to comply with these precautions violates safety standards of design manufacture and intended use of the product Telit assumes no liability for customer failure to comply with these precautions e The C24 must be operated at the voltages described in the technical documentation e The C24 must not be mechanically nor electrically changed Use of connectors should follow the guidance of the technical documentation e The integrated product incorporating the C24 module must be evaluated for SAR under intended use conditions and suitable text and SAR values be provided to the end user e No wireless device can guarantee operation at all times due to network or interference conditions A user should never rely on a wireless device as the sole means of making emergency calls e The C24 module complies with all applicable standards and directives this does not guarantee that the product it is integrated into complies expert advice should be sought to identify the applicable regulations and show compliance Suitable warning statements regarding the use of RF energy in the integrated host system should be given in the end user documentation 1 11 Antenna and Transm
80. the power supply is disconnected from C24 the RTC timer will reset and the current time and date will be lost On the next C24 power up the time and date will be set again automatically or manually 3 7 3 7 1 3 7 2 it C24 Hardware User Guide 1VV0300920 Rev 1 2012 08 31 Serial Interfaces C24 includes three completely independent serial communications interfaces which may be used by the application for several purposes Primary UART UART1 The C24 primary UART is a standard 8 signal port for RS232 The UART is used for all the communications with C24 AT commands interface 1x data and CSD data programming and software upgrades The UART signals are active low CMOS level signals For standard RS232 communications with a PC an external transceiver is required C24 is defined as a DCE device and the user application is defined as the DTE device These definitions apply for the UART signals naming conventions and the direction of data flow as described in the following figure Figure 3 10 UART1 Interface Signals The C24 primary UART supports baud rates 300 600 1200 2400 4800 9600 19200 38400 57600 115200 and 230400 bps Auto baud rate detection is not supported and the default baud rate is 115200 bps All flow control handshakes are supported hardware software or none The UART default port configuration is 8 data bits 1 stop bit and no parity with hardware flow control and 115200 baud ra

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