Q52 Omni Wireless CPU Development Kit User Guide
Contents
1. Development Kit User Guide Q52 Omni Wireless CPU Reference WI DEV ASSM UGD 006 Revision 001 Date December 18 2008 wovecom Smart wireless Smart business Wireless CPUs Operating Systems Integrated Development Environments Plug Ins Services vwovecon Smart wireless Smart business Q52 Omni Development Kit User Guide Q52 Omni Development Kit User Guide Reference WI DEV _ASSM _UGD 006 Revision 001 Date December 18 2008 Cellular Modem AT Firmware Embedded Applications C Lua NR integrated Development Environment Real Time Multitasking OS Embedded Plugins Powered by the Wavecom Open AT Software Suite wavecom 6 confidential Page 1 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide Cautions The antenna s used for this transmitter must be installed to provide a separation distance of at least 20 cm from all persons and must not be co located or operating in conjunction with any other antenna or transmitter The antenna s used for this transmitter must not exceed a gain of 3 dBi for mobile operation and 7 dBi for fixed operation Users and OEM integrators must be provided with antenna installation instructions and transmitter2. R316 Rot Common Column Voltage selection Figure 3 Supply voltage setting To select the nominal supply voltage setting for Q52 the jumper shall be placed between the center and right column in the middle position see Figure 3 This will set the supply voltage to 3 8V factory setting 3 4 External Supply It is possible to apply a custom voltage source on both V_MAIN and V_AUX Customers can use this feature to test out their own power supplies before creating an application PCB CROS CeO J607 J600 V_MAIN C Bank gt e Solder Bridge J604 607 i Cool J605 gt V_AUX V_ MAIN ae ee Terminal a 5 C Terminal D ae J606 nA V_AUX C Bank W Solder Bridge 9 x 40 Sue 40 R507 303 Figure 4 External custom supply connection wavecom 6 Confidential Page 14 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM_UGD_ 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide To apply an external supply on V_MAIN jumper J604 should be removed and the custom supply be connected to the terminal indicated in Figure 4 If a capacitor bank is required for stability Solder Bridge J607 can be shorted This will add a capacitor bank of 300uF 3 4 1 V MAIN 3 4 2 V AUX To apply an external supply on V_ AUX jumper J605 should be re
3. Inter IC control bus Input Output MICrophone Personal Computer Printed Circuit Board Pulse Code Modulation Pulse Width Modulation Radio Frequency Ring Indicator Real Time Clock Request To Send Receive Data Subscriber Identity Module Serial Peripheral Interface SPeakKer Test Point Transmit Data Universal Serial Bus 12V supply for Q52 and CM52 3 6V to 4 0V supply for Q52 or 4 5V to 5 5V for CM52 Page 9 24 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development Kit User Guide 1 0 52 Omni Development Kit Description 1 1 Carrier Board overview J504 EXT INT test points J207 SIM I F option J602 J603 Buzzer LED Test points D300 Flash LED Indicator J302 J304 J305 Supply voltage i E E n J _ Ker h E EE Cal i Aige E pE k 1 ao EE Ha PF a TH H L T BE Li hj Fz ad a a 2 A ow L FETE Ex er g E L i E MH ra w mi E Lu SL 2 d in L _ d ar fi A SA CA oe aber oo dia 1 g Be ml Hie Sy ELE 2 has does ee It Le mp ins EF Hf Gg 5 7 _ 5 EPEC ELE mH eepo eooo m E ei see ps ball o s ET Tes He S TT ME ELLE RSS S545 a TN E mi _ lt Fos Tis SS ae m Irs 5 es Teh P z Wee wavecom 6 Confidential WI_DEV_ASSM_UGD_ 006 001 EXT ed WHG i free pr
4. This provides a low gain path to Q52 Omni wavecom confidential Page 20 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development a Kit User Guide J201 MIC I F Selection J301 AGND GND Solder Bridge AUX P le 4 MIC MIC IP MIC MIC N AGND y202DK WyP ki AUX OP E SPK AUX ON ACK EAR P SPK EAR N AGND DK WuP Figure 8 Audio setup on carrier board By default AUDIO signals are available on its dedicated carrier board test point interfaces J201 MIC AUXI and J202 EAR AUXO Their recommended default setting is shown in Figure 8 above Solder bridge J301 should be bridged so to connect AGND with GND Setting J201 S201 MIC IP to MIC me Low Sain MIC IN to AGND AUX IP to MIC Mic High Gain AUX IN to AGND AUXI Table 4 Microphone Settings Setting J202 S200 SPK to EAR P SPK to AUX OP SPK High Gain AGND to AUX ON AUXO Table 5 Speaker Settings WoOaVeECOM Confidential Page 21 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI DEV _ASSM UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business z Q52 Omni Development a Kit User G
5. exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 WavVecon Smart wireless Smart business Q52 Omni Development 3 J Kit User Guide G UART1 Function The UART1 function is the main RS232 serial link of the Q50 Omni CM52 By default UART1 is available on its dedicated base board connector J401 Pin Number_ Signal Name VO WO Type Description MARCHER V24 V 28 Out From Q52 CM42 a es Oe V24 V28 Data From Q52 CM42 e e l 1 7 V24 V28 Data To Q52 CM42 RS232 Data Terminal Ready D po Ground RS232 Data Set Ready V24 V28 Out From Q52 CM42 o4 om 5 GND o 6 jo 7 RTS RS232 Request To Send V24 V28 In To Q52 CM42 CTS RS232 Clear To Send V24 V28 Out From Q52 CM42 RS232 Ring Indicator V24 V28 Out From Q52 CM42 Table 2 UART1 pin out 6 1 RI LED The RING INDICATOR indicator is a green LED located in the Indicator LED area on the base board The LED blinks in the case of incoming calls wavecom Confidential Page 18 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business 5 Q52 Omni Development en ee Kit User Guide 7 UART2 Function The UART2 function is the auxiliary RS232 serial link of the Q5
6. operating conditions for satisfying RF exposure compliance OEM must also be provided with labeling instructions This device contains EGSM GPRS functions This filing is applicable for GSM850 MHz E GSM900 MHz DCS1800 MHz and PCS1900 MHz operations Information provided herein by Wavecom is accurate and reliable However no responsibility is assumed for its use General information about Wavecom and its range of products Is available at the following internet address htip www wavecom com No patent liability is assumed with respect to the use of the information contained herein wavecom Confidential Page 2 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development i Kit User Guide Trademarks A Bo WaV COM EA inSIM YOU MAKE IT WE MAKE IT WIRELESS WAVECON Wireless Microprocessor Wireless CPU Open AT and certain other trademarks and logos appearing on this document are filed or registered trademarks of Wavecom S A in France and or in other countries All other company and or product names mentioned may be filed or registered trademarks of their respective owners Copyright This manual is copyrighted by WAVECOM with all rights reserved No part of this manual may be reproduced modified or disclosed to
7. prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development Kit User Guide History of the evolution a December 18 2008 Creation y O ee E wavecom confidential Page 5 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide Table of Contents 1 Q52 Omni Development Kit DescriptiOon mmmmmmmmmnmnuuss 10 1 1 Carrier Board overvieW dicseic sedation scewsciectanseweddeeieiadeawadoeetiandedehecdeeawencdswr 10 1 2 Base Boarq overvieW EL 2 4 at on cause ernan nannan nenn 11 2 General Description 2 5 2 nae ou atenusecsoucesucss 12 2 1 O2 DevV ODMENL NS ee enert n a ee adecco eee ban a on a nes 12 2 2 ROHS CODES cscmere catenaseausemenacutcas aaea aa seaapemesacetraascacsemanaaceancs 12 3 Power S Uppiy a eee 13 3 1 Main SUD AA de da ee nee a 13 3 2 Main power Switch and LED Indication cece eee e eee eee e eee eeeeneees 13 3 3 Voltage Setting of V_MAIN es ne game na eau penses 14 3 4 External SUDDIY ers ea ee de ea ed een ie ee relie 14 NAN a ee a 15 SR Re ere 15 4 Buzzer and Flash LED cece 15 5 Control Functions 5 22 22512 26200 ness bes sses ouesccus esc 16 5 1 JN OF Ue VV IN cesar tienes ctee a E EE EE
8. third parties in any form without the prior written permission of WAVECOM No Warranty No Liability This document is provided as is Wavecom makes no warranties of any kind either expressed or implied including any implied warranties of merchantability fitness for a particular purpose or noninfringement The recipient of the documentation shall endorse all risks arising from its use In no event shall Wavecom be liable for any incidental direct indirect consequential or punitive damages arising from the use or inadequacy of the documentation even if Wavecom has been advised of the possibility of such damages and to the extent permitted by law WoOaVeECOM Confidential Page 3 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide Overview This document describes the Q52 Omni Development Kit based on a mother board Version 20 Ref Wm0502301 012 20 This Development Kit is equipment which can be used to develop software and hardware based on the Q52 Omni Wireless CPU Refer to the documentation 1 for further information about the Q52 Omni Wireless CPU WOaVeECOM Confidential Page 4 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without
9. to digital converters These are 10 bit resolution ADCs ranging from OV to 2V 9 4 DAC Output signal DACO The Q52 provides one digital to analog converter the DACO signal This is an 8 bit resolution DAC ranging from OV to 2 3V 9 5 Serial Bus The Q52 provides one SPI bus The master mode is available up to 13Mbit s with 3 or 4 wires 9 6 IC Bus The Q52 provides one IC bus wavecom Confidential Page 23 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV ASSM UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide 9 7 External Interrupt The Q52 provides an external interrupt EXT INT 9 8 HW SD The Q52 provides a HardWare ShutDown feature By applying a short low pulse nominally 150ms Q52 will perform a controlled power down sequence SW400 HW SD Push Button When a low level is applied on HW SD Q52 re defines the signal from an input to an output and sets it low LED D400 will be turned on until Q52 has performed a proper shut down At this point Q52 will re define HW SD as an input and it will be pulled high causing LED D400 to turn off It is now safe to remove power from Q52 wavecom Confidential Page 24 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agre
10. 0 ON OFF Switch Figure 5 ON OFF switch 5 2 Service BOOT DCD1 The Service BOOT switch S300 is only used to download new software to the Q52 Omni via UART1 with the specific downloaded software provided by WAVECOM By default S300 switch located on the base board must be in the NORMAL MODE position at ide MI S300 Indication LED M p 3 Service BOOT Area Switch V406 E MAIN POWER va Enr V405 LED ae E SERVICE V407 LED UNIT POWERED ON LED Figure 6 Service BOOT switch WaVeCON Confidential Page 16 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI DEV _ASSM UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide Before downloading new SW the whole Development Kit should be powered down S301 set to OFF The sequence for powering the unit up in Service BOOT mode is listed below Ensure main power is off base board switch S301 set to OFF Set Service BOOT switch S300 on the base board to SERVICE MODE Set ON OFF switch SW600 on the carrier board to ON Connect the computer RS 232 interface to UART1 Start SW down load sequence Apply main power by setting the MAIN POWER switch S301 of the base board to ON o pS IS wavecom 6 confidential Page 17 24 This document is the sole and
11. 2 It operates at 1 8V but is level translated to 2 8V on the carrier board before being routed to J402 of the base board J402 is a SUB D 9 pin female connector The table below defines the connector signals A Signal Name F3 Lo Tips ie ces V24 V28 Data From Q92 CM42 e l e a V24 V28 Data To RCE 4 f nosed n a A 2 ee eee V24 V28 In To Q52 CM42 MR AOr V24 V28 Out From inane aii Vo 9 Notused 7 1 7 Table 3 UART2 pin out wavecom Confidential Page 19 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM_UGD_ 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development A Kit User Guide 8 Audio There is one single ended audio interface on the Q52 Omni containing MIC SPK and an audio reference AGND The base board has two differential audio interfaces MIC EAR and AUXI AUXO The MIC EAR directly connects the handset to Q52 via the carrier board while AUXI AUXO is going through amplifiers before being routed to Q52 via the carrier board Base Board Carrier Board Q52 Omni AUX IP A a MIC IP MIC IN Figure 7 Audio path overview Default recommended jumper settings for J201 and J202 of the carrier board are shown in Figure 7 above S200 on the base board should be set to EAR and S201 on the base board should be set to MIC
12. D 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide Reference Documents 1 Q52 Omni Wireless CPU Product Technical Specification and Customer Design Guidelines Ref WI DEV ASSM PTS 001 2 Q52 Omni Wireless CPU AT Commands Manual Ref WI DEV ASSM UGD 003 3 Q52 Omni Wireless CPU User Guide Ref WI DEV ASSM UGD 005 wavecom 6 confidential Page 8 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business ADC AUX CLK CPU CTS DAC DC DCD DCE DSR DTE DTR ESD GND GPI GPIO GPO IIC 12C I O MIC PC PCB PCM PWM RF RI RTC RTS RXD SIM SPI SPK TP TXD USB V_AUX V_MAIN wavecom 6 Confidential This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM_UGD_ 006 001 Q52 Omni Development 7 Kit User Guide List of Abbreviations Analog to Digital Converter AUXiliary CLocK Central Process Unit Clear To Send Digital to Analog Converter Direct Current Data Carrier Detect Data Communication Equipment Data Set Ready Data Terminal Equipment Data Terminal Ready ElectroStatic Discharges GrouND General Purpose Input General Purpose Input Output General Purpose Output
13. E AE E E E E E E tanec 16 5 2 service BOOT DC OT ER RR E ieee 16 6 UART1 UREN CIO riers en mean eau sucres 18 6 1 DURE D PR RU 18 7 UART2 FunctiOn 22222222552 55555 5 55 5 25 2 2 2 19 8 AO ne E ceucaneeeunacuseuecusscusesmeeunacaseueeweecueunes 20 8 1 Handset COR OEe ce ticcceeseeoreec uc ONEN access ae ardessas qecessicaseuseeessseuecses 22 9 Others Interfaces en ete ec ees cesar en seweeeeeseeeecs 23 9 1 Reference Supply Output VCC _2V8 cece eee e eee e eee eeeeenneeennnees 23 9 2 Backup Battery BAT RTC cence eee ee eenee teen eeteneesaneetanenes 23 9 3 ADC Input signals ADCO ADC1 ccc cece ccc cece cence eee e ee en ee teneeeeeeeeteneenas 23 9 4 DAC Output signal DACO en te ai can une cote 23 9 5 Ss ES a ae nd A De a ee ne a ce ee a en 23 9 6 FCG DUS i aete ecshseccge cede de ees e ede oie Pins edae ae ay eae canard andes ead nuaneve 23 9 7 a UNI ALES EE S i PNR EE E EE RE NN OR RS 24 wavecom Confidential Page 6 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM_UGD_ 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development Kit User Guide wavecom Confidential Page 7 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM _UG
14. coe FOR PTS PTE md abe Dac A BH E SEC gp He Al E SD bati A a HE DAC pad Wu von E AICO E a Ane e270 Go ik WHE Po i ni P ad om ESNI E as i OC ADC D4 A1 E II S DCE 2 2 TH ie ATS Figure 1 Q52 Omni Development Kit Carrier Board J501 Q52 DAC out J502 Q52 ADC in test points J600 Q52 Omni Board to Board Connector J500 SPI test points J300 UART2 test points J600 Q52 Omni Ribbon cable Connector J203 J204 UART 1 test points SW600 ON OFF Switch SVWV400 HW SD Switch Page 10 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development Kit User Guide 1 2 Base Board overview J200 Audio Handset Connector S200 AUXO EAR J201 F Selector switch Audio Headset Connector S201 AUXI MIC Selector switch J401 UART1 Connector S300 Service Boot Selector switch 7401 pm Indication r LED s UART1 Ne Connector J100 Main Power Connector S301 Main Power Switch Figure 2 Q52 Omni Development Kit Base Board wavecom confidential Page 11 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM_UGD 006 001 December 18 2008 vwoveco
15. e main 12V power is supplied from an external AC DC adaptor through connector J100 It supplies all circuitry on the two developer boards base board and carrier board 3 1 Main Supply Adapter The Q52 Development Kit is powered by an AC DC power supply Manufacturer Reference Characteristics Astrodyne 12VDC xxA Table 1 Main supply adapter reference 3 2 Main power Switch and LED Indication Main Power indicator is a red LED located on the base board It indicates the presence of the main supply adaptor and that the Development Kit is powered on S301 MAIN PWR is set to ON 301 MAIN POWER Switch The indicator LED MAIN POWER is located on the base board in the indication LED area in the front wavecom Confidential Page 13 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV_ASSM_UGD_006 001 December 18 2008 waovecom Smart wireless Smart business Q52 Omni Development en ee Kit User Guide 3 3 Voltage setting of VMAIN It is possible to select different Main supply voltage levels V_MAIN by applying a jumper on header pins J302 J304 or J305 The headers can be found in the upper left corner of the Carrier Board The voltage settings support two products CM52 and Q52 Omni V_MAIN CM52 052 Q52 Voltage selection CM52 Voltage selection
16. ement WI_DEV_ASSM _UGD 006 001 December 18 2008 WAVECOM S A 3 esplanade du Foncet 92442 Issy les Moulineaux France Tel 33 1 46 29 08 00 Fax 33 1 46 29 08 08 Wavecom Inc 430 Davis Drive Suite 300 Research Triangle Park North Carolina USA Tel 1 919 237 4000 Fax 1 919 237 4140 WAVECOM Asia Pacific Unit 201 207 2nd Floor Bio Informatics Centre No 2 Science Park West Avenue Hong Kong Science Park Shatin New Territories Hong Kong PRC Tel 852 2824 0254 Fax 852 2824 0255 Online contact details GPS and maps wovecom Smart wireless Smart business
17. moved and the custom supply be connected to the terminal indicated in Figure 4 If a capacitor bank is required for stability Solder Bridge J606 can be shorted This will add a capacitor bank of 500uF 4 Buzzer and Flash LED The BUZZER is located on the base board To connect it to BUZZ OUT of Q52 jumper J602 must be mounted or mount a 0 ohm resistor on R604 The FLASH LED is located on the carrier board To connect it to the LED output of Q52 jumper J603 must be mounted or mount a 0 ohm resistor on R605 P503 DK WuP FLASH LED 1603 J603 0 Flash LED Flash LED Resistor emol 8 105 R6Q4 R wavecom Confidential Page 15 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV ASSM UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business t Q52 Omni Development Kit User Guide 5 Control Functions 5 1 ON OFF PWR_EN To be able to power on the Q52 or CM52 the main power switch S301 on the base board must be set to ON see 3 2 above This is indicated by the MAIN POWER LED The powering up of the Q52 or CM42 is controlled by the ON OFF switch SW600 located on the carrier board which set to the ON position will power up the unit The success powering of the unit is indicated by the UNIT POWERED ON LED located in the indication LED area of the base board SW60
18. n Smart wireless Smart business t Q52 Omni Development Kit User Guide 2 General Description 2 1 Q52 Development Kit All Q52 Development Kit functionality is provided by the Q52 Omni Wireless CPU Interfaces on the board include Main serial link RS232 UART1 Ring Indicator Auxiliary serial link RS232 UART2 with 4 signals AUDIO connector LEDs for several indications Power supply connector ON OFF switch SERVICE BOOT switch Buzzer Flash LED 2 2 RoHS Compliance The Q52 Omni and the Development Kit board are compliant with ROHS Restriction of Hazardous Substances in Electrical and Electronic Equipment Directive 2002 95 EC which sets limits for the use of certain restricted hazardous substances This directive states that from 1st July 2006 new electrical and electronic equipment put on the market does not contain lead mercury cadmium hexavalent chromium polybrominated biphenyls PBB or polybrominated diphenyl ethers PBDE Wireless CPU units which are compliant with this directive are identified by the RoHS logo on their label PoHS COMPLIANT O02 95 EC wavecom Confidential Page 12 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV ASSM UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development 7 Kit User Guide 3 Power Supply Th
19. uide 8 1 Handset Connector Caution The analog audio channels are very sensitive to noise this board is not designed for audio noise optimization J200 is a RJ9 4 pin connector SII IAL III II III IIIS III IAAI IIIS Figure 9 Handset connectorJ200 Table 16 defines the signals and relative pins for the AUDIO1 connector Microphone J negative input Speaker Speaker Microphone Table 6 Pin out of the Handset connector WoOaVeECOM Confidential Page 22 24 This document is the sole and exclusive property of WAVECOM Not to be distributed or divulged without prior written agreement WI_DEV ASSM UGD 006 001 December 18 2008 vwovecon Smart wireless Smart business Q52 Omni Development Kit User Guide 9 Others Interfaces There are other available interfaces on the Q52 Development Kit 9 1 Reference Supply Output VCC 2V8 The VCC_2V8 output can be used to connect pull up resistors and can supply minor external logic such as level translators etc It must be used as a reference supply for all external interfaces 9 2 Backup Battery BAT RTC The Q52 provides this input output signal BAT RTC to connect a Real Time Clock power supply This pin is used like a backup power supply to save date and time values when V MAIN is switched off Q52 will output 2 7V 2 with a typical output current of 1 0mA 0 4mA to 2 0mA 9 3 ADC Input signals ADCO ADC1 The Q52 provides two analog
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