Jupiter SE880 Hardware User Guide
Contents
1. B rm ket Hi E eme i TETRA ation from Telit Communications S p A All Rights Reserved Page 31 of 43 mi Reproduction forbidden vvithout vvritten authoriz i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 9 1 3 SPI Mode If both the CTS SPI and RTS SPI pins are left floating the SE880 will power up in slave SPI mode supporting both SPI and Microwire formats In this mode the four pins are defined below RX SSPI DI slave SPI Data inputt MOSI TX SSPI DO slave SPI data output MISO The host interface SPI is a slave mode SPI e An interrupt is provided when the transmit FIFO and output serial register SR are both empty e The transmitter and receiver each have independent 1024B FIFO buffers e The transmitter and receiver have individual software defined 2 byte idle patterns of 0xa7 Oxb4 e SPI detects synchronization errors and is reset by software e Supports a maximum clock of 6 8MHz based on HCLK 2 54 7MHz as the SPI source clock CL ation from Telit Communications S p A All Rights Reserved Page 32 of 43 ah Reproduction forbidden without written authoriz i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 0 7 4 Auxiliary Serial Interface The SE880 provides an auxiliary serial interface that can be configured as either a master IC interface or a master SPI bus These features are implemented using either 2 or 4 of the GPIO pins on2. Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 37 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 1 Antenna 7 Rep 1 m bat Antenna Requirements The SE880 is architected to use with passive antenna and conformal antenna design in a compact structure in which RF trace loss can be minimized by bringing the antenna close to the RF input port of the SE880 whereas RF ground is provided alongside for the completion of the antenna s grounding Right hand circularly polarized RHCP GPS antenna with center frequency at 1 575GHz should be used A linearly polarized antenna will have 3dB loss as compared to an RHCP polarized antenna as the GPS signal is right hand circularly polarized Antenna Gain and RF Link Budget Antenna s power gain or simply gain is a key performance figure which combines the antenna s directivity and electrical efficiency As a receiving antenna for GPS the figure describes how well the antenna converts radio waves arriving from the space into electrical power This gain is expressed in dBi and is different to the gain of an active antenna which is mostly misinterpreted during the design of a GPS receiver The gain of an active antenna is referring to the low noise amplifier s gain LNA gain inside of the active antenna This gain doesn t help to improve the energy conversion from the radi
3. explains the antenna requirement of the product Chapter 8 Handling and Soldering provides some handling recommendations that must be followed by customer in the manufacturing process Chapter 9 Safety Recommendation provides some safety recommendations that must be follow by the customer in the design of the application that makes use of the SE880 Chapter 10 Document History provides the revision of this document 1 5 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 1 e Y Y Y Y MM DD 1 6 Related Documents e Telit Jupiter SE880 Product Description Mid ation from Telit Communications S p A All Rights Reserved Page 8 of 43 a Reproduction forbidden without written authoriz elit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 2 General Product Description The Telit s Jupiter SE880 is the world smallest best in class turnkey GPS 3D SiP navigation solution to combine off the die RF circuitries and most passives based on the CSR SiRFStarIV GPS PVT engine The core of S
4. i pex d m gt i z a F p E den without written authorization from Telit Communications S p A All Rights Reserved Page 19 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 4 2 3 NMEA Output Messages NMEA v3 0 is the default protocol The following messages are output by default e RMC 1 second update e GGA 1 second update e GSA second update e GSV 5 second update Reference the NMEA protocol manual for additional message details 4 2 4 SIRF OSP Output Messages SiRF One Socket Protocol OSP is supported This is an extension of the existing SiRF Binary protocol The following messages are output once per second MID2 MID4 MID9 MID41 MIDS56 5 MID56 35 Reference the SiRF One Socket Protocol manual for additional message details Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 20 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 4 2 9 Functions and Capabilities Improve position accuracy by using freely available ia on satellite based correction services called SBAS Satellite i Based Augmentation System Low Signal Acquires satellites and continues navigating in extremely Yes Acquisition low signal environments Low Signal T Continues tracking in extremely low signal environments es Tracking A timing pulse generated every second the
5. Telit Technical Support Center TTSC at Alternatively use For detailed information about where you can buy the Telit modules or for recommendations on accessories and components visit 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 Le ud 7T m I 1 e ation from Telit Communications S p A All Rights Reserved Page 7 of 43 Telit appreciates feedback from the users of our information ge ah Reproduction forbidden without written authoriz i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 1 4 Document Organization This document contains the following chapters Chapter 1 Introduction provides a scope for this document target audience contact and support information and text conventions Chapter 2 General Product Description gives an overview of the features of the product Chapter 3 Specifications provides in details the electrical characteristics of the product Chapter 4 Operation explains the functions and features of the product Chapter 5 Applications and Schematic Examples provides in details the hardware implementations of the product Chapter 6 PCB Layout provides in details the PCB layout for design and manufacturing Chapter 7 Antenna
6. VKA 8 ei amp C Kh VDD 9 80ld9 Ob Old9 Ll FOld9 PL cOld9 Sl LOld gt 9L OO0ld9 Zl IX 914 ZL OX O1M EL 3 6 i lit Jupiter SE880 Hardyvare User Guide 1VV0301032 Rev 0 2012 10 31 Quality and Environmental Specifications DONEC 24hr bake at 125 C oo P S Mleisime soci per MSL 3 Reflow 3X High Temperature Storage JESD22 A103 85 C 1008 hours 85 C 10 min 40 C 10 min Temperat C yedik JESD22 A104 Transit time 4s Test cycles 500 cycles Temperature Humidity Bias JESD22 A101 85 C 85 R H 1008 hours NOTE Moisture Sensitivity Telit ships all devices dry packed with desiccant and moisture level indicator sealed in an airtight package If on receiving the goods the moisture indicator is pink in color then follow J STD 033 Handling and Use of Moisture Reflow Sensitive Surface Mount Devices Storage Out of Bag The SE880 meets MSL Level 3 168 hours Floor Life lt 30C 60 RH Ifthe stated floor life expires prior to reflow process then follow J STD 033 Handling and Use of Moisture Reflow Sensitive Surface Mount Devices NOTE Production Control The sensitivity of SE880 is less than 1 dB part to part variation i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 4 Operation 4 1 4 2 Operating modes After power up the SE880 boots from the internal ROM to Hibernate state The operation of
7. a V N N j E Be Ruso ma 7 t a Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 6 of 43 OE Foxit PDF Editor taVa eeE EUOD c by Foxit Software Company 2004 V 5OAOU E J 8 lelit Jupiter SE880 Hardyvare User Guide 1VV0301032 Rev 0 2012 10 31 1 Introduction 1 1 Scope This document describes the hardyvare features of the vvorld smallest high performance turnkey Telit GPS solution Jupiter SE880 Advanced 3D System in Package embedded die technology is used to integrate SAW filter and most passive components Recommendations are provided for integrating this receiver into customer designs requiring only a 32 KHz external crystal for its time base and TCXO to complete the design along with antenna power and data connections adequate to the integrator s needs Features include class leading sensitivity stability particularly at the extremes of 40 and 85 C one satellite acquisition of UTC micro power stand by mode innovative multi filter RF architecture CW jamming resistant DSP and super small size This compact and powerful GPS SiP is in a 4 7 x 4 7 x 1 4 mm 34 pins LGA package 1 2 Audience This document is intended for helping GPS developers in the integration of the Telit Jupiter SE880 1 3 Contact Information Support For general contact technical support to report documentation errors and to order manuals contact
8. 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 Italy 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 The Telit and 3rd Party supplied Software SW products described in this instruction manual may include copyrighted Telit and other 3rd Party supplie
9. to UART I VDD 1 8V o Passive Antenna 10k O TX CJ Le Rx DD short 50 Ohm trace st e N T eo ak N m op m m M NIN N ONDI o pm 26 System ON SYSTEM ON 2 5 34 gt RF GND ON_OFF ON_OFF TM Y Jupiter E 22 GND2 21 3 2 VERS SESSO ci OUT GND d c VREG O x s i3 4 lvcc enpo VKA 18 C1 TCXO VDD 1 8V 0 1uF 16 369MHz S o sj ej e R2 V y 100k GPIOO R3 ENN VDD 1 8V in The flexibility for protocol selection is not T mmm available if any MEMS or non volatile E U Z 18pF Z 22pF memory devices are attached to the auxiliary serial bus GPIOO and GPIO1 VDD 1 8V VDD 1 8V GPIO3 GPIO1 GPIO4 GPIOO Optional Serial Flash SST25WF040 eee i Cd Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 24 of 43 ir La i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 The circuit below shows a basic design for use with UART interface Power Management Switcher mode Baud and Protocol Selection NMEA 9600 Baud Fd T Configure to UART T assive Antenna i VDD 1 8V Q DC decoupling cap required for 10k O 1x c u ZN active antenna Rx Do short 50 Ohm trace ee 6 5 w G GND1 o o lu System ONg 2 SYSTEM ON 2 a ON_OFF ON_OFF n E TM Jupiter E EN p 3 our eno Eh dus SE880 1 shielded je vec eno VREG_O 8 E a VISA D 2 2uH ci C2 C3 TCXO VDD 1 8V Q Shielded 0 t
10. E880 is state of the art GPS architecture employing spatially calibrated waveguide quality radio paths inside the three dimensional space of its architecture drastically reducing parasitic impedances characteristic of traditional 2 D RF designs The SE880 is suitable for L1 band GPS and A GPS systems to achieve best in class performance in all dimensions critical for regular or size constrained GPS applications Jupiter SE880 is in 4 7 x 4 7 x 1 4 mm 34 pins LGA package to make the chipset versus module decision an easy one to make for device integrators SE880 chip size receiver module was conceived to shorten Time to Market and Integrators can attain a working SE880 based design in as little as a week versus several months when starting from a chipset reference design 2 1 Features High performance Solution e Ultra high sensitivity frontend without the need of active antenna e High sensitivity navigation engine PVT tracks as low as 165dBm e 48 track verification channels e SBAS WAAS EGNOS QZSS and others Adaptive Micropower Controller e Average of 50 to 500A per hour to maintain hot start capability e lt 10mW required for TricklePower mode Three Stages Passive and Active Jammer Removal e Integrated pre selection SAW filter at antenna port e Integrated notch filter attenuates unwanted energy at 2 4GHz e n band jammers removal up to 80dB Hz e Tracks up to 8 CW jammers ge ation from Telit Communications S p A Al
11. OE Foxit PDF Editor 4 ceeE EUOD c by Foxit Software Company 2004 12690 AOU EA Aj Teli wireless solutions Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 1 r ES DEN T CT LN iia t http www sensorexpert com cn 400 883 3391 Making machines talk Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 APPLICABILITY TABLE PRODUCT Jupiter SE880 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 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 neither does it convey license under its patent rights or the rights of others It is possible that this publication may contain references to
12. RTS SPI pin should be pulled low through a 100K resistor to GND The CTS SPI pin can be left open or pulled low Upon power the SE880 acts as a master transmitter and a slave receiver Pull ups to a 1 8V to 3 6V power supply in the range of IK to 2 2K are required on the RXA and TXA lines when used in lC mode In this mode the pins are defined below Signal Name IFC Function FC Bus Data SDA FC Bus Clock SCL Bit rates to 400K are achievable Note the CTS SPI and RTS SPI lines are read at power up or reset only and are not used afterwards The operation of the C with a master transmit and slave receive mimics a UART operation where both SE880 and host can independently freely transmit It is possible to enable the master transmit and slave receive at the same time as the FC bus allows for contention resolution between SE880 and a host vying for the bus NOTE This FC port should not be confused with the secondary I C port on the SE880 which is reserved for external serial EEPROM Serial Flash and MEMS sensors The I C host port interface supports e Individual transmit and receive FIFO lengths of 64B e The default I2C address values are Rx 0x60 Tx 0x62 e Operating mode is multi master Transmit side operates as a master by seizing the IC bus when detected idle Receive side operates as a slave when another master seizes bus and transmits to our address a7 r I i J 1 rat P i d I v ow
13. SE880 Only one of these buses may be implemented on a receiver At start up the receiver automatically detects either an C EEPROM or a SPI serial flash memory and sets itself appropriately If SE880 does not detect memory of either type the system is configured for an I C bus for sensor interface During the auto detect process GPIO 4 3 and GPIO 1 0 are momentarily driven high and low Master SPI Interface Non volatile memory storage can be provided by 4Mbit serial flash memories from either SST or EON The flash memory can store a ROM patch both server generated and client generated extended ephemeris files up to 31 days in length satellite almanacs crystal temperature characterization data and data logs All of these items can be stored simultaneously on the same flash device Through the master SPI interface SE880 reads and writes data at approximately 1 0Mbps with a maximum of 1 25Mbps Master FC Interface This mode is the default for the receiver It can be used to communicate with MEMS sensors such as accelerometers magnetometers and altimeters and with EEPROM storage devices Some features of the interface include e Support for most common sensor formats accelerometers gyros magnetometers altimeters upport for multiple data lengths Standard IEC bus data rates of 100kbps and 400kbps Accepts both 64KB and 128KB EEPROMS 128KB EEPROMSs can store server generated EE files up to 7 days in length Only an approved ac
14. SE880 requires ON OFF interrupt to wake up for Normal Navigation Full on mode Modes of operation e Full on Navigation Full Power o Power management system modes e Hibernate state Full on mode SE880 boots for internal 1 2V LDO regulator mode Internal Switcher mode regulator reduces power consumption and requires a binary command from host to enable Switcher mode SE880 will enter Hibernate state after first power up with host port configuration and GPIOO and GPIOI settings The Navigation mode will start after waking up from Hibernate state in cold start mode by sending ON OFF signal interrupt pulse from host This mode is also referenced as Full on Full Power or Navigation mode Navigation is available and any configuration settings are valid as long as the VDD power supply is active When the VDD is powered off settings are reset to the configuration set at the host port and GPIOO and GPIO1 Receiver performs a cold start on next power up VDD supply is intended to be kept active all the time and navigation activity is suggested to be controlled 3 i a 1 A HET i t P 3 1 T P id m mule 1 e r Ruso Bl ation from Telit Communications S p A All Rights Reserved Page 18 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 4 2 1 Main Serial Interface Configuration User can select the serial interface host port between UART SPI slave or FC maste
15. TEM ON and using this detection to gate off the SYSTEM ON signal to the ON OFF signal If GPIOS is pulled to logic 1 then the ON OFF input is modified to be just an ON input It would not be possible to place the SE880 into hibernate by pulsing ON OFF in this case This feature could be useful by inverting the RX input and applying it to the ON OFF input thus causing the receiver to enter full power mode when a serial message is received Of course the first message would not be processed as the receiver has not fully woken up VDD 18 cw Mn INTERNAL AT ON OFF Unknown i Unknown SYSTEM ON Figure Initial Application of Main Power Pepa 6 ben without written authorization from Telit Communications S p A All Rights Reserved Page 29 of 43 i lit Jupiter SE880 Hardyvare User Guide 1VV0301032 Rev 0 2012 10 31 Prior Event State Symbol F RTC startup time SEO ATI applied FSM Ready pulse RTC running TRTC is equivalent to one RTC 32 678KHz clock cycle 9 6 Reset Design Details The SE880 will generate an internal reset as appropriate No external reset signal needs to be applied When power supply VDD may be abruptly removed suggestion is to use externally generated reset by means of monitor the 1 8 volt supply and issues an internal hardware reset NSRESET to low state if the supply drops below 1 7 volts If an external reset is desired the signal must be either open collector or open dr
16. The receiver operates by capturing a buffer of GPS samples at infrequent intervals and analysing the data to update its time frequency and position estimates For satellites needing updated ephemeris data a data collection is scheduled when strong signals are detected During the data collection phase time and frequency calibration operations are also carried out Typical Capture Update frequency varies about once every ten minutes for 9 seconds Data collection is twice an hour at 18 seconds each Rest of the time the receiver stays in Hibernate state and achieves 500LA typ average current drain The host wakes up the receiver by ON OFF control input interrupt pulse low high low gt 90Qus to perform a fix After valid fix operation can return back to MPM by re sending the configuration binary message from host This mode is configurable with SiRF OSP One Socket Protocol binary protocol message MID218 3 Push to Fix Mode PTF PTF Mode is for applications that require infrequent position reporting and average current levels are proportionally lower relative to ATP Mode duty cycle This mode allows the receiver to wake up periodically typically every 30 minutes configurable between 10 sec to 2 hours for position update and to determine if a refresh of GPS time ephemeris data and RTC calibration is required before the next HIBERNATE cycle Rest of the time the receiver stays in Hibernate state When position update is needed the host can w
17. ain without any form of pullup Do not pull this line high with either a pullup or a driven logic one When this line is pulled low the SE880 will immediately drop into hibernate mode with some loss of data When the external reset is released the SE880 will go through its normal power up sequence provided the VDD supply is within specifications 9 7 Main Serial Interface The SE880 has the capability to operate in serial UART mode SPI mode or FC mode depending upon how the CTS SPI and RTS SPI pins are strapped at power up Either leave the pin floating apply a 10K resistor to 1 8V PU or apply a 100K resistor to GND PD CTS SPI internal pull down RTS SPI internal pull up Leave floating Leave floating Leave floating Leave floating Renraduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 30 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 9 7 1 UART Mode The CTS SPI pin should be pulled high through a 10K resistor to the 1 8 volt supply The RTS SPI pin can be left open or pulled high Upon power up the SE880 will communicate using a standard asynchronous 8 bit protocol with messages appearing on the TX line and commands and data being entered on the RX line Note the CTS SPI and RTS SPI lines are read at power up or reset only and are not used afterwards In particular no flow control operations are performed 9 422 IC Mode The
18. ake up the receiver by ON OFF control input interrupt pulse low high low gt 90us This mode is configurable with SIRF uS protocol message ID151 amp 167 Renraduction ben without written authorization from Telit E S p A All Rights Reserved Pace of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 4 Hibernate state Hibernate state means a low quiescent 14uA typ power shunt down state TX and RX signals are configured to high input impedance state In this state only the RTC oscillator clock monitor RTC time counter BBRAM are powered The main supply input VDD shall be kept active all the time even during Hibernate state Operation is resumed by host interrupt at ON OFF control input rising edge toggle low high low gt 90us Hibernate state allows a Hot Start within 2 4 hours of last shut down The GPS receiver must have had a valid fix with sufficient visible satellites before having been shut down via the ON OFF line or serial command Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 23 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 5 Applications and Schematic Examples The circuit below shows a basic design for use with UART interface Power Management LDO mode Baud and Protocol Selection NMEA 9600 Baud DC decoupling cap required for E active antenna s Configure
19. ally low When it transitions high it should stay high for a time equivalent to a minimum of 3 RTC clock cycles 90us The signal may then transition low and remain low until the next change in power state is desired The SE880 powers up directly into the hibernate state It is possible to have the module automatically transition to the full power state by tying the SYSTEM ON output to the ON OFF input GPIO8 should also be tied high which changes the ON OFF signal to just an ON signal However this implementation eliminates the possibility of using the ON OFF signal to change power states If the serial command to place the SE880 in hibernate mode 1s issued the receiver will transition to the hibernate state with no way other than removal and reapplication of power with resulting RTC and SRAM data loss to force the receiver to power up For some users this may be all that 1s required if time and data retention are not important during a power down situation A single OR gate with one input being SYSTEM ON and the other being an external pulse will allow the receiver to be turned back on with a suitable pulse but it will not be possible to use a second pulse as it is blocked with the SYSTEM ON signal The only option to place the receiver in hibernate state is to issue the serial command If full ON OFF control is desired along with having SYSTEM ON auto start the receiver then additional logic is needed to detect the first falling edge of SYS
20. celerometer KIONIX part number KXTF9 4100 3 x 3mm LGA 1 8V 3 axis accelerometer can be used The interrupt output of the accelerometer must be connected to GPIO4 of the SE880 Data for the approved magnetic sensor Aichi Steel part number AIM304 3 5 x 4 0mm 3V 3 axis magnetometer is output in OSP message 72 a Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 33 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 6 PCB Layout 6 1 Pins dimensions Note Bottom view in mm C C I LI L C L OUUU 0 8 71 Ur Uu p au QJ ND II e E JD n X A a C3 LE LU al JD Loco N b 2m ed T 4 i 1 ri dun C O Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 34 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 6 2 Solder Land Design for Main Mother board Note Top view in mm PO P 4x7 rE 8 solder land solder mask solder resist NOTE The solder land is defined by solder mask opening SMD Pads in blue color above The area in yellow is not the actual size of the solder land and it is governed by the PCB design rules defined by the device integrators Reproduction forbidden without written authorization
21. cr DUO essei E ERE EREE i 9 MEE FOUE E E ee ee 9 E e E 11 EM Maor 0 16 01 PONTE NS NE 11 2s SPC CHIC A TIONG MONETE TE OO TETTE 12 od se Se 12 o2 Recommended Operating LOTON S gj nd ve 12 So Ar N eee ee ee ee eee 13 Sh sos 14 29 eo URBI relgeiiio o MERE RDUM 15 3 6 Quality and Environmental Specificati on S aaa naaana ana nana enen eee eee eee e eee eee eee eee 17 EE do E ER ee 18 ER PEN 18 E E Genes TTUTT 18 4 2 1 Main Serial Interface Configuration aaa uu aaaaaaaaaaaa nana ane nanen enen teve eee eee eee tete rere nennen nennen eee seti 19 422s ad Protocol ele ON es ni QU MCA ERE WKN ERES EENDE ETRE EEEa 19 4 2 3 NMEA Output MeSSSEBS pasna 20 i24 SIRF Or OGIO Ut IIS SAQ ctm DEI rE EOR ERA RR 20 4 2 9 Functions and Capabilities needs t nd n th Wise ececodeaaquadeaimeadessencneimns 21 4 9 Power Management System MOQ S dunavesvis ni vedi sti di 22 9 Applications and Schematic Examples e hene eee eke ne are nente nnns 24 Reproduction forbidden without written authoriz ge 2 E kul a i ar i x j F ee SEI coma pr E F i TET ation from Telit Communications S p A All Rights Reserved Page 5 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 I 26 D EUS IMINO V oesixtmteniet E eMe MEMMIUS MELDEN MEE 27 S EMEN igi n 27 9 4 Implementing Pseudo Battery Back up eese 28 9 9 Under
22. d computer programs stored in semiconductor memories or other media Laws in the Italy 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 e RENI E pM Te li elit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 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 N
23. for I O and internal blocks NE Eee ae 7m cmos vo Generi Purpose ponp L m Go wo ener Purpose purer NM General Purpose Input Output GPIO Baud Rate and Protocol Detection General Purpose Input Output GPIOO Baud Rate and Protocol Detection General Purpose Input Output GND3 uu GROUND for general TCXO VCC TCXO PWR TCXO voltage supply GND4 GROUND for TCXO RF reference clock input TCXO input or 21 TCXO CLK CLK bare crystal output connection for built in XO option Bare crystal input connection for built in XO po a ak option or open for TCXO 2 GND5 RF GROUND for antenna connection GROUND for antenna connection GND6 Lt GROUND for antenna connection Ber roduictian forbidden without written oe from Telit Belshi tane S p A All Rights Reserved Page 15 of 43 Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Host port boot strap General Purpose Input Output Host port boot strap General Purpose Input Output UARTISPIA2C 1 8V UART SPI I2C 3 6V tolerant QE LASAYSN t NI d PE XH ce XL 8c 6ON9 GND1 1 26 GND8 25 GND7 24 GND6 23 GND5 22 XTAL CLK 21 TCXO CLK 20 GND4 19 VCC TCXO 18 GND3 NL E A 7 i e fi SH TET Reproduction forbidden without written authorization from Telit Comimn caions S p T All Rights Reserved Page 16 of 43 SYSTEM_ON ON_OFF TM GND2 VBB 6 VREG 7
24. from Telit Communications S p A All Rights Reserved Page 35 of 43 Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 6 3 Solder Paste Stencil Note Top view in mm reference thickness 3 mil or 0 076mm TEFA Os Ai A L E FA 2e Fi L 2 n a Le E d A a d A r ui i ri C Le c k POST FU 4x5 2 4 PO G25 4m MZ l O325 Lees ees PO 323 FPU dx7 2 8 F udd pe a T ee s z 3 a 4 i i 1 j P T ci i re 4 F j E i 3 Im I i TE SE r i m r m if i E E d inl i hae RN la Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 36 of 43 Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 6 4 Layout Example for SE880 Grounding Concept Pin 1 I pi All top layer RF amp at lh GND must bc M connected to i the big GND plane underneath i c the bottom layer should have some good GND flooding GND for all purpose Digital GND for TCXO Y Ascparation on thc top 50 Ohm trace layer GND betwecn the RF and Digital GND prevent RF GND for antenna GND loop NOTE Use RF GND pin 23 26 28 amp 29 for Antenna s ground Backside of the PCB or the next layer beneath the top signal traces should be flooded with GND plane
25. g SE880 EVK and reference design are typically built with Torex XC6221 1 8V LDO for the VDD supply Ber roduictian forbidden without written oe from Telit Belshi tane S p A All Rights Reserved Page 12 of 43 3 3 Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 DC Electrical Characteristics Current Usage Ipp peak Supply current peak acq pt to m mA current Ae tracking Ipp Hib Supply current hibernate state a Ipp MPM Micro Power Mode average current p 500 f m Standard I O Low level output voltage Io 2mA 0 4 x ae High level output voltage log 2mA P VERE V Low level input Low level input voltage 03 3 vo C E Rev Internal pull up resistor equivalent Internal pull up resistor equivalent 50 86 157 kQ So L hm leakage at Input leakage at VI 1 8V or0V 8V or 0V Input leakage at VI 1 8V or0V 10 10 Ju 0 E Tristate output leakage at VO 1 8V or aso o uA GJ Input capacitance digital output pe p Reference Clock Input TCXO CLK Reference clock input level sine ee Vpk pk TCXO CLK Reference clock input level square iy 3 NOTE Note a This is only achieved if the software patch is in use Please contact technical support for software patch applications Without it current consumption is approximately 5mA higher Teee forbidden without written authorization from Telit Communication
26. g the status of the SYSTEM ON line which will be low whenever the SE880 is in the hibernate state At this point the main supply can be safely switched over to the backup supply provided the 1 8 volt supply stays within specification Similarly the switch back to the main supply must occur prior to placing the SE880 into full power mode If the product containing the SE880 needs to support abrupt removal of power then the module will require a split rail design for the VDD power Please refer to application notes or contact technical support for details Understanding ON OFF and SYSTEM ON The SE880 power is controlled by a state machine This state machine is clocked by the internal 32 KHz RTC clock and is controlled by internal signals as well as the ON OFF and NSRESET signals The SYSTEM ON signal reflects the power state of the SE880 logic low for hibernate mode and logic high for full power mode When power is first applied the internal RTC must start up before the state machine can begin operating ON OFF signals applied before the state machine is ready for them will be ignored The SE880 signals the readiness to accept ON OFF signals by outputting a pulse on the SYSTEM ON line after power is first applied This pulse is only output upon application of power and is not output when the receiver is in hibernate or full power mode i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 The ON OFF signal is norm
27. ibernate whereas logic high indicates the module is in operate state When power supply is intended to be removed it is suggested to send the ON OFF signal prior VDD removal for to send a serial message in NMEA format PSRF117 16 0B lt CR gt lt LF gt or binary MID 205 to shut down firmware operations orderly Otherwise e g external EEPROM may get corrupted if power down happens in the middle of EEPROM writing which may increase in TTFF If the 1 8 volt VDD supply is removed from the SE880 regardless of power state it will lose current RTC time and will lose the contents of the internal SRAM To prevent improper startup once power is removed keep the power removed for approximately 10 seconds so the internal SRAM contents can clear reliably If external memory or data storage at host memory is used and it is likely that power supply will be removed abruptly suggestion is to monitor the 1 8 volt supply and issues an internal hardware reset NSRESET to low state if the supply drops below 1 7 volts This reset protects the memory from accidental writes during a power down condition However the reset also clears the RTC time and forces the SE880 into a hibernate state To prevent this the 1 8 volt supply must be regulated to be within 50 mV of nominal voltage inclusive of load regulation and power supply noise and ripple Noise and ripple outside of these limits can affect GPS sensitivity and also risk tripping the internal vo
28. idden without written authorization from Telit Communications S p A All Rights Reserved Page 41 of 43 OE Foxit PDF Editor taVa eeE EUOD c by Foxit Software Company 2004 V 5OAOU E J 8 lelit Jupiter SE880 Hardyvare User Guide 1VV0301032 Rev 0 2012 10 31 9 Safety Recommendations READ CAREFULLY Be sure the use of this product is allovved in the country and in the environment required The use of this product may be dangerous and has to be avoided in the follovving areas e Where it can interfere with other electronic devices in environments such as hospitals airports aircrafts etc e Where there is risk of explosion such as gasoline stations oil refineries etc It is responsibility of the user to enforce the country regulation and the specific environment regulation Do not disassemble the product any mark of tampering will compromise the warranty validity We recommend following the instructions of the hardware user guides for a correct wiring of the product The product has to be supplied with a stabilized voltage source and the wiring has to be conforming to the security and fire prevention regulations The product has to be handled with care avoiding any contact with the pins because electrostatic discharges may damage the product itself The system integrator 1s responsible for the functioning of the final product therefore care has to be taken to the external components of the module as well as of any pro
29. ject or installation issue because of the risk of disturbing external networks or devices or having impact on the security Should there be any doubt please refer to the technical documentation and the regulations in force Every module has to be equipped with a proper antenna with specific characteristics The antenna has to be installed with care in order to avoid any interference with other electronic devices The European Community provides some Directives for the electronic equipments introduced on the market All the relevant information s are available on the European Community website The text of the Directive 99 05 regarding telecommunication equipments is available while the applicable Directives Low Voltage and EMC are available at d i ES Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 42 of 43 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 10 Document History Revision Date Changes 0 2012 10 31 First Release Reproduction forbidden without written authorization from Telit Comimn caions S p A All Rights Reserved Page 43 of 43
30. l Rights Reserved Page 9 of 43 ah Reproduction forbidden without written authoriz i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Advanced Navigation Features e SV fast time sync for rapid UTC update e Smart sensor PC interface e Embedded Data logger e Measurement smoothing for pedestrians mode e A GPS free 3 days CGEE and 14days SGEE expandable to 31 days SGEE Simple To Use e Requiring only a 32 KHz crystal and TCXO along with antenna and power e Typical solution on 2 layer PCB e Optional external memory SPI Flash or Serial EEPROM e Single 1 8V supply with integrated LDO and switcher mode e GPIO Baud Rate and Protocol Configuration e Fail safe I O including RTC and TCXO inputs e Host PC SPI and UART supported Mechanical Feature e Dimensions 4 7x 4 7x 1 4 mm typ e Package 34 pins LGA 0 4mm pitch e Weight 0 08g Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 10 of 43 ad e Telit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 2 2 Block Diagram Te Ko d PA PA PJ P A 4 j y d B ie d F J p A 4 F d AV l d P s al Antenna Port 48 Ch Integrated GPS Engine 2 3 Major Components Passive Antenna WLU G G I l I I I I I I SE880 requires two external reference clocks 16 369MHz TCXO and 32 768kHz XTal antenna and a 1 8V always ON suppl
31. ltage supervisors thereby shutting down the SE880 unexpectedly Regulators with very good load regulation Renraduction forbidden without written authorization from Telit E S p A All Rights Reserved Page 27 of 43 9 4 D i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 are strongly recommended along with adequate power supply filtering to prevent power supply glitches as the SE880 transitions between power states Aluminum electrolytic capacitors are not recommended at the input to the SE880 due to their high ESR Low ESR ceramic capacitors are recommended with a minimum value of 10uF in parallel with a 0 1uF ceramic capacitor but make sure the LDO is stable with such capacitors tied to the output As mentioned above power supply voltage noise and ripple must be between 1 75V and 1 85V for all frequencies up to 3MHz Above 3MHz the noise and ripple component must not exceed tl5mV To help meet these requirements a separate LDO for the SE880 is suggested NOTE SE880 EVK and reference design are typically built with Torex XC6221 1 8V LDO for the VDD supply Implementing Pseudo Battery Back up As mentioned above the SE880 cannot tolerate removal of the 1 8 volt supply without losing RTC time and SRAM data The main supply voltage can be switched to a backup supply external to the SE880 provided the receiver is allowed time to enter the hibernate state This can be accomplished by monitorin
32. mple of PCB Printed Antenna 24 mm Yt TCXO 26 5 mm RTC XTAL UART Jupiter SE880 Reproduction forbidden without written authorization from Telit Communications S p A AU Rights me Mod 0805 2011 07 Rev 2 e Telit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 8 Handling and soldering 8 1 ESD The SE880 is an electrostatic discharge sensitive device and should be handled in accordance with JESD625 A requirements for Handling Electrostatic Discharge Sensitive ESDS Devices The expecting handling of the SE880 during assembly and test is identical to that of a semiconductor device Note JEDEC standards are available for free from the JEDEC website http www jedec org 8 2 Reflow The SE880 is compatible with lead free soldering processes as defined in IPC JEDEC J STD 020 The reflow profile must not exceed the profile given IPC JEDEC J STD 020 Table 5 2 Classification Reflow Profiles Although IPC JEDEC J STD 020 allows for three reflows the assembly process for the SE880 uses one of those profiles Thus the SE880 is limited to two reflows Over 200 deg C 65 seconds 399 C pe80Sec 580 C Peak temp 250 1 deg C 250 S lt More than 250 deg C 35 Sec 120sec 200 if 180 deg C T 148 deg C 100 90 0 Se 0 60 120 180 240 300 360 420 480 Note JEDEC standards are available for free from the JEDEC website http www jedec org Reproduction forb
33. o 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 Trademark Office All other product or service names are the property of their respective owners Copyright O Telit Communications S p A j 1 ku JI UM Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 4 of 43 elit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Contents EM WEP OCIUC TION M e EEE E 7 MEME n E eee 7 te AUI NOO n E E E 7 1 9 Cona ION live OM PROT E E E 7 La Docume Organza PROP 8 TO erone n sean sataceecauaceens 8 Kore lata DIO UONI Tm 8 2 General Product Des
34. o wave arriving from the space into electrical power The calibrated waveguide quality structure of SE880 brings the system noise figure consistently down to 3 5dB NFreceiver in LDO mode in which about 0 4dB belongs to the implementation loss at the RF front end The following equation can be used to calculate the sensitivities of SE880 Sensitivityminimum 174dBm Hz C Nominimum NF receiver The minimum carrier to noise ratio C No minimum at the input of the quantizer of SE880 is 22dB Hz for satellites acquisition 1 e Cold Start sensitivity So the cold start sensitivity of SE880 is 148 5dBm 174 22 3 5 If an active antenna with LNA gain of 16dB and NF of 2dB is used the sensitivity of SE880 can only be improved by 0 3dB to 148 8dBm So the improvement to cost ratio is not significant by using an active antenna Therefore in a compact GPS design if there is no excessive loss due to a long lossy RF trace or a cable between the antenna and the SE880 the passive antenna s gain is the determination factor for the overall system sensitivity For example if the passive antenna gain is 1dB1 it brings the cold start system sensitivity to 149dBm minimum roduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 38 of 43 e Telit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Antenna Ground The gain of a passive antenna is not a static number bu
35. r s j r E 7 1 a at he d u Ti wu ifi Fa Hd E Li i ilii i i j s B P equa s a n Li r J a u F E u Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 26 of 43 9 2 9 9 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 External Memory SE880 supports both SPI serial Flash and EEPROM for simultaneous storage of CGEE and SGEE up to 31 days in length ROM patch storage and data logging feature SPI Flash only For detailed applications please refer to application notes or contact technical support SST SST25WF040 SST 1 8V serial Flash memory 4Mbit SST 24AA512 SST FC serial EEPROM 512Kbit Power Supply The SE880 requires only one VDD supply voltage of 1 8 volts Rather than having a split power supply design of main and backup the SE880 manages all of its power modes internally and VDD supply intended to be kept alive all the time First power up may take 300ms typ due to internal RTC startup time after which the SE880 will enter into the lowest power hibernate state Upon pulsing the ON OFF signal the SE880 will transition to the operate state Pulsing the ON OFF signal a second time will transition the SE880 back into the hibernate state The current power state of the SE880 can be determined by monitoring the SYSTEM ON signal A logic low indicates the module is in h
36. r slave during power up boot depending upon how the CTS SPI and RTS SPI pins are strapped at power up Either leave the pin floating apply a 10K resistor to 1 8V PU or apply a 100K resistor to GND PD Mode CTS_SPI internal pull down RTS_SPI internal pull up UART PU Leave floating Leave floating Leave floating 4 2 2 Baud Protocol Selection GPIOO and GPIOI can be used to configure the serial interface to output NMEA at standard baud rates If SE880 is not using PC or SPI flash devices on GPIOO and GPIOI The table below lists the settings for GPIOO and GPIOI to configure the baud rate at start up GPIOO GPIOI Protocol Baud Rate Pull high Pull high NMEA 4800 Pull high Pull low NMEA 9600 Pull low Pull high NMEA 38400 Pull low Pull low OSP 115200 NOTE The default data format for UART 8 data bits no parity 1 stop bit After start up the GPIOs can be released for other purposes This flexibility is not available if any MEMS or non volatile memory devices are attached to the auxiliary serial bus The internal software default baud rate is NMEA 4800 when an SPI Flash or EEPROM device is attached but can be changed via a CCK patch or an OSP message Failure to tie GPIOO and GPIOI high or low in the absence of both SPI flash and EEPROM causes an increase in standby and hibernate current and also causes the start up configuration of the UART to be indeterminate N L7 ERN E at fer SARA I a T oh gee
37. receiver is in a Tie vals valid navigation state 5 SVs required for initial pulse Yes Pulse 1PPS start up MEMS 3 axis accelerometer support for static detection and wake A up 3 axis magnetometer support for compass heading AGPS using prediction of ephemeris from live Yes CE downloaded from satellites ephemeris stored in memory AGPS using server generated extended ephemeris is now compatible with 14 day prediction files available from the yore Telit s server expandable to 31 days These files can be saved in SPI Flash EEPROM or host memory Adaptive System scans for up to 8 CW jammers for removal by the Detection GPS es 2 4GHz Notch System can reject 2 4GHz signals at the antenna port input Yes Filter up to 38dB attenuation A Ld Determine UTC time quickly from one GPS satellite A A Almanac Based Allows fast cold starts TTFF 22 s typ based on factory set Positioning or broadcast or pushed Almanac data Y Jammer Supports 4 Mb SST and EON SPI flash devices SE880 SPI Flash uses flash memory for storage of almanac EE data Support logging crystal and XO temperature models and patch code AMES OE The embedded data logging function is configurable and OBEIDE will save data on SPI flash Baud Protocol Baud rate and protocol selection can be set upon start up lt R Selection through GPIOO and GPIO1 configuration Yes always enabled A available but not enabled by defa
38. s S p A All Rights Reserved Page 13 of 43 3 Rep 4 Ki T Jupiter SE880 Hardyvare User Guide 1VV0301032 Rev 0 2012 10 31 System Specifications ee TT Accuracy Horizontal Position Accuracy lt 1 8m CEP50 Communication Host port configuration UART SPI or I2C configurable Serial port protocol NMEA 0183 rev 3 0 configurable to SiRF binary OSP serial data format UART 8 bits no parity 1 stop bit 4800 9600 115200 baud configurable depending upon DISP DISCHI pull high or pull low with GPIOO and GPIOI Update rate default 1 Hz configurable to 5Hz NOTE 1 SE880 is able to track satellites no fix at 165dBm and re acquire position fix at 162dBm or C No at 8 5dB Hz or better contact technical support for additional performance data 2 typical good view of sky 137dBm or better 3 weak signal at 143dBm or better 4 50 CEP open sky 24hr Static E roduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 14 of 43 3 9 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Pin out Description Pad GNDI GND PWR GROUND for general zz SYSTEM ON EN Indication that GPS 1s running Active high ON OFF I Input signal turns GPS ON or OFF Active high Buse 4 mw 9 mmiwemskphe IT Le veni PWR core digs supet 2V IT NS o VKA 1 8v keep alive input
39. standing ON OFF and SYSTEM ON aaa ae eee eee n eee eee rene reze nnne 28 9 6 Reset Design Details nun nana nnnena seen nene e rene r ee peer ee peer e eee nete p e nete pene teve nnne nnne nnne ene nnns 30 5 7 Main Serial Interface ana aaan akne neneve epe ne eee pene tee pe nennen nnne teke e ete eee nisi eee eee tat 30 JA MOUE c 31 5 72 MO NNI 31 Io Eu T c H H 32 WIE DP rel ei ai La el gt RE EO OLET 33 O 5 45 n IY Y 34 6 1 Pins ANA ON uussexsxsctmudqept e UND SUED tI MUES 34 6 2 Solder Land Design for Main Mother board ccccccccsseeeeeeeeeeeeeeeeaeeeeeeaeeeeeeeeaaeees 35 6 3 Solder Paste Stencil srwiki niaaa aa inana einai 36 6 4 Layout Example for SE880 Grounding COoncept ssssssssnnessnrensrrrnsrrrrnsrrresrrnene 37 Te AR EIE 38 7 1 Antenna Requirements cccccccccsscccsseccceececceececseeeeceusecseueessuueeseusesseueesseueeneueessageess 38 8 Handing and cnn m 41 ole o 41 B 41 Dx Sg RECOM MC Ga ONS pp inem accidEt Man Hm NI Kia e du mu ipn UNE 42 WO Document Het Oy err Dui queda VaMMoiEiI EID SK Cte A EdLI e dina IR UEM USE UEUEE 43 r gt a r i a E w mgr ay pr ares nea E m et j 4
40. t is largely depended on the size of the ground plane The following table shows the effect of antenna gain with variation in size for both of the antenna and ground plane Ceramic Patch Antenna Size mm Groundplane mm Gain dbi 35 x 35 75 x 15 4 0 25 x 25 70 x 70 5 0 18x 18 50 x 50 2 5 15x 15 40 x 40 1 0 13 x 13 40 x 40 2 0 12 8 x 12 8 40 x 40 2 5 12x 12 35x35 2 5 10x 10 30 x 30 4 0 9x9 30 x 30 3 0 The following example shows the relationship of antenna gain versus ground plane size for a 25 x 25 x 4mm ceramic patch RHCP antenna Gain dBic 30 40 90 60 70 80 90 100 Side size of square ground plane mm The ground plane requirements for different types of GPS antenna are different It is necessary to check with the antenna s venders for the ground plane design Other than the most commonly used ceramic patch antenna there are helical antenna chip antenna and printed antenna The following example demonstrated a PCB printed antenna was designed with the SE880 by a third party developer A similar printed antenna with other combination of passive antennas shall be included in the SE880 Reference Design Kit 1 ia a n Pj Bi EL j 1 E ETT SENE Reproduction forbidden without written authorization from Telit Communications S p A All Rights Reserved Page 39 of 43 i mye f CIG Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Application Exa
41. uFj 10uF 1000pF 16 369MHz in val m a SS R2 Vv took GPIOO R3 ENS VDD 1 8V Y2 10k R4 GPIOO C4 So GPIO1 ek 7 HIGH 18pF 32 768KHz 22pF LOW VDD 1 8V SST25WF040 Optional Serial EEPROM I I I I I I I I l VDD 1 8V l GPIO3 GPIO1 GPIO4 GPIOO I I ce I I l o 0 1uF i Optional Serial Flash 2 I I I I I The flexibility for protocol selection is not available if any MEMS or non volatile memory devices are attached to the auxiliary serial bus GPIOO NOTE System noise is 2dB higher with switcher mode Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 5 1 Bill of Material Basic BOM for LDO Mode Description Comments RTC Quartz Crystal 12 5pF load Cap UE capacitor place close to ECKEN Basic BOM for Switcher Mode Rakon NDK Epson 16 369MHz GPS TCXO 0 5ppm 1 8V seen Penteom TC 32 768KHz RTC Quartz Crystal 12 5pF load Cap River NDK and others Decoupling capacitor place close to 0 1uF TEXO Low ESR decoupling capacitor place close to TCXO Decoupling capacitor place close to TCXO 10uF 1000pF 10 Port configuration 100k Not used pull down 10 Baud Protocol Selection 6k Baud Protocol Selection Shielded power inductor EPL2010 CoilCraft switch mode regulator Shielded power inductor EPL2010 CoilCraft filtering 1 2 1 2 3 4 18pF Loading capacitor 5 1 3 4 1 2 a NENNEN NENNEN NENNEN ss SS ea Se J t PF i 4
42. ult 7 1 EZ E S T Reprodu Page 21 of 43 4 3 i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 Povver Management System Modes SE880 supports different operating modes for reduced average povver consumption like Adaptive TricklePower Micro Power modes Push to Fix and Advanced Power Management 1 Adaptive Trickle Power ATP ATP is a duty cycled mode The system enters standby between navigation updates This mode focuses on an update rate and navigation solution quality so it can transition to Full Power Mode for 100ms to 800ms and provides a valid fix This results in variable power savings but for a fixed output rate much more reliable performance Between fixes with 1 to 10 sec interval the receiver stays in Hibernate state Applications using TP Mode perform similarly to applications using full power but with significant power savings in strong signal conditions This mode is configurable with SiRF binary protocol message ID151 The receiver stays once in while in Full on power mode automatically to receive new ephemeris data almanac data ionospheric and UTC data perform RTC convergence or if received signal levels drop below certain level 2 Micro Power Mode MPM MPM is a very low power maintenance mode The objective of MPM is to remain below a stated average current level while maintaining a low level of uncertainty in time frequency position and ephemeris state
43. y with noise and ripple characteristics mentioned in Chapter 3 for reliable operation This can be a 1 8V supply that is backed up by a very low current 1 8V LDO that will supply the 14uA typical when the GPS has been shut down into Hibernate mode ation from Telit Communications S p A All Rights Reserved Page 11 of 43 I ki mg i ia Reproduction forbidden without written authoriz i lit Jupiter SE880 Hardware User Guide 1VV0301032 Rev 0 2012 10 31 3 Specifications 3 1 3 2 Absolute Maximum Ratings RE tour poe m 3 dm ES veg mm 5 ov OO EA I a no v feoreSupplyVoluge RT 5 V Input Pin One OupuFinVolags x 3 v Sorge Tempen e des co WARNING Stressing the device beyond the Absolute Maximum Ratings may cause permanent damage These are stress ratings only Operation beyond the Operating Conditions is not recommended and extended exposure beyond the Operating Conditions may affect device ESD CAUTION Note 1 acc to JESD22 A115A machine model Apply ESD static handling precautions during manufacturing Recommended Operating Conditions we J Pan M mm m T Operating temperature So 2 RM RMS Supply voltage ripple AC coupled oT f 3MHz NOTE Noise management for a good GPS design is importance Please obverse the stated VDD ripple requirement and apply appropriate regulated power source with proper filterin
Download Pdf Manuals
Related Search