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 />
Function Signal name IO Signal form and level Comments<br />
Analog audio GSM_EPP2 O V O max = 3.7Vpp<br />
The audio output is<br />
interfaces<br />
See also Table 32.<br />
balanced and can directly<br />
GSM_EPN2 O<br />
operate an earpiece.<br />
If unused keep pins open.<br />
Explanation of signal names:<br />
P = positive, N = negative<br />
GSM_EPP1<br />
GSM_EPN1<br />
GSM_MICP1<br />
GSM_MICN1<br />
GSM_MICP2<br />
GSM_MICN2<br />
O<br />
O<br />
I<br />
I<br />
I<br />
I<br />
V O max = 3.7Vpp<br />
See also Table 32.<br />
R I ≈ 50kΩ differential<br />
V I max = 1.03Vpp<br />
See also Table 33.<br />
R I = 2kΩ differential<br />
V I max = 1.03Vpp<br />
See also Table 33.<br />
Balanced audio output. Can<br />
be used to directly operate<br />
an earpiece.<br />
If unused keep pins open.<br />
Balanced microphone input.<br />
To be decoupled with 2<br />
capacitors (C K = 100nF), if<br />
connected to a microphone<br />
or another device.<br />
If unused keep pins open.<br />
Balanced microphone input.<br />
Can be used to directly feed<br />
an active microphone.<br />
If used for another signal<br />
source, e.g. op amp, to be<br />
decoupled with capacitors.<br />
If unused keep pins open.<br />
Antenna<br />
power<br />
Internal<br />
antenna<br />
power<br />
GPS_VANT I Max. 8V DC<br />
Max. 25 mA<br />
GPS_VCC_RF O Typ.: 3.0V ±5% DC<br />
Max: 25 mA<br />
Power supply for active<br />
antenna; in case of 3V<br />
antenna can be connected<br />
to GPS_VCC_RF<br />
Regulates 3V output for<br />
feeding a 3V active GPS<br />
antenna<br />
GPS power GPS_VCC I Typ.: 3.3V ±5% DC Typ. 80 mA (without feeding<br />
GPS_VCC_RF)<br />
50 mV ripple<br />
Digital Input /<br />
Output<br />
GPS_GPIO0 I/O CMOS 3.3V DC level See Chapter 4.5<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
Digital Input /<br />
Output<br />
GPS_GPIO1 I/O CMOS 3.3V DC level See Chapter 4.5<br />
GPS_GPIO3 I/O CMOS 3.3V DC level See Chapter 4.5<br />
GPS_GPIO4 I/O CMOS 3.3V DC level Output for Trickle Power<br />
mode. Connect externally to<br />
GPS_RFPC1. Usable as<br />
LED control output, see<br />
Chapter 4.7<br />
GPS_GPIO5 I/O CMOS 3.3V DC level See Chapter 4.5<br />
GPS_GPIO6 I/O CMOS 3.3V DC level See Chapter 4.5<br />
GPS_GPIO7 I/O CMOS 3.3V DC level See Chapter 4.5<br />
GPS_GPIO8 I/O CMOS 3.3V DC level Output for Trickle Power<br />
mode. Connect externally to<br />
GPS_RFPC0. Usable as<br />
LED control output, see<br />
Chapter 4.7<br />
GPS_GPIO10 I/O CMOS 3.3V DC level See Chapter 4.5<br />
GPS_GPIO13 I/O CMOS 3.3V DC level See Chapter 4.5<br />
XT55/56_hd_v02.06a Page 93 of 125 17.12.2004