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 />
6 Electrical, reliability and radio characteristics<br />
6.1 Absolute maximum ratings<br />
Absolute maximum ratings for supply voltage and voltages on digital and analog pins of<br />
XT55/56 are listed in Table 24. Exceeding these values will cause permanent damage to<br />
XT55/56.<br />
Table 24: Absolute maximum ratings (GSM part)<br />
Parameter Min Max Unit<br />
Voltage GSM_BATT+ -0.3 4.8 V<br />
Voltage at digital pins -0.3 3.3 V<br />
Voltage at analog pins -0.3 3.0 V<br />
Voltage at digital / analog pins in POWER DOWN mode -0.25 +0.25 V<br />
Voltage at GSM_POWER pin 15 V<br />
Voltage at GSM_CHARGE pin 15 V<br />
Differential load resistance between EPNx and EPPx 15 Ω<br />
Table 25: Absolute maximum rating (GPS part)<br />
Parameter Min Max Unit<br />
Voltage at GPS_VCC -0.3 3.46 V<br />
Current at GPS_VCC_RF 25 mA<br />
6.2 Operating temperatures<br />
Test conditions were specified in accordance with IEC 60068-2 (still air). The values stated<br />
below are in compliance with GSM recommendation TS 51.010-01.<br />
Table 26: Operating temperatures<br />
*)<br />
Parameter Min Typ Max Unit<br />
Ambient temperature (according to GSM 11.10) -20 25 55 °C<br />
Restricted operation *) -25 to -20 55 to 70 *** °C<br />
Automatic shutdown<br />
XT55/56 board temperature<br />
Battery temperature<br />
-29<br />
-18<br />
>70 **<br />
>60<br />
Charging temperature (software controlled fast charging) 0 +45 °C<br />
**)<br />
XT55/56 works, but deviations from the GSM specification may occur.<br />
XT55/56 has the automatic shutdown set to 70°C at PCL 5 (GSM 900) GPRS class 8. This<br />
prevents permanent damage to components on the board. Consider the ratio of output power,<br />
°C<br />
°C<br />
XT55/56_hd_v02.06a Page 87 of 125 17.12.2004