Hardware Interface Description - KORE Telematics
Hardware Interface Description - KORE Telematics
Hardware Interface Description - KORE Telematics
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XT55/56 <strong>Hardware</strong> <strong>Interface</strong> <strong>Description</strong><br />
Confidential / Released<br />
s<br />
Contents<br />
0 Document history..........................................................................................................8<br />
1 Introduction .................................................................................................................11<br />
1.1 Related documents..............................................................................................11<br />
1.2 Terms and abbreviations .....................................................................................12<br />
1.3 Type approval ......................................................................................................16<br />
1.4 Safety precautions ...............................................................................................18<br />
2 Product concept..........................................................................................................20<br />
2.1 XT55/56 key features at a glance ........................................................................21<br />
2.2 Circuit concept .....................................................................................................24<br />
3 GSM application interface..........................................................................................26<br />
3.1 GSM/GPRS operating modes..............................................................................26<br />
3.2 Power supply .......................................................................................................28<br />
3.2.1 Power supply pins on the board-to-board connector .............................28<br />
3.2.2 Minimizing power losses........................................................................29<br />
3.2.3 Monitoring power supply........................................................................29<br />
3.3 Power up / down scenarios..................................................................................30<br />
3.3.1 Turn on the GSM part of XT55/56..........................................................30<br />
3.3.1.1 Turn on the GSM part of XT55/56 using the ignition line<br />
GSM_IGT (Power on) ............................................................31<br />
3.3.1.2 Timing of the ignition process................................................32<br />
3.3.1.3 Turn on the GSM part of XT55/56 using the<br />
GSM_POWER signal.............................................................33<br />
3.3.1.4 Turn on the GSM part of XT55/56 using the<br />
RTC (Alarm mode).................................................................33<br />
3.3.2 Turn off the GSM part of XT55/56..........................................................35<br />
3.3.2.1 Turn off GSM part of the XT55/56 module using<br />
AT command .........................................................................35<br />
3.3.2.2 Emergency shutdown using GSM_EMERGOFF pin .............36<br />
3.3.3 Automatic shutdown...............................................................................37<br />
3.3.3.1 Temperature dependent shutdown........................................37<br />
3.3.3.2 Temperature control during emergency call ..........................38<br />
3.3.3.3 Undervoltage shutdown if battery NTC is present .................38<br />
3.3.3.4 Undervoltage shutdown if no battery NTC is present ............39<br />
3.3.3.5 Overvoltage shutdown...........................................................39<br />
3.4 Automatic GPRS Multislot Class change.............................................................40<br />
3.5 Charging control of the GSM part ........................................................................41<br />
3.5.1 Battery pack characteristics...................................................................43<br />
3.5.2 Recommended battery pack specification .............................................44<br />
3.5.3 Implemented charging technique...........................................................45<br />
3.5.4 Operating modes during charging..........................................................46<br />
3.5.5 Charger requirements............................................................................47<br />
3.6 Power saving .......................................................................................................48<br />
3.6.1 No power saving (AT+CFUN=1) ............................................................48<br />
3.6.2 NON-CYCLIC SLEEP mode (AT+CFUN=0)..........................................48<br />
3.6.3 CYCLIC SLEEP mode (AT+CFUN=5, 6, 7, 8) .......................................48<br />
3.6.4 CYCLIC SLEEP mode AT+CFUN=9 .....................................................49<br />
3.6.5 Timing of the GSM_CTS signal in CYCLIC SLEEP modes ...................49<br />
3.6.6 Wake up XT55/56 from SLEEP mode ...................................................51<br />
XT55/56_hd_v02.06a Page 3 of 125 17.12.2004