Technical Manual

Table Of Contents
Rev. 1Telital S.p.A.
TECHNICAL MANUAL
GS/GSM
DUAL MODE USER TERMINAL
Page 8 of 13
3.11 Electrical interface
3.11.1 Bottom connector
The 20 pin bottom connector SO2 HIROSE MQ168–QC–20P/4 allows the DMUT inter-
facement with the accessories as Car Kit, Battery charger, Data Terminal Adapter.
The four pins from 21 to 24 allows the connection of battery pack.
PIN NAME A/D IN/OUT DESCRIPTION
1 +VBATT A IN +10.4V from battery charger
2 DM_TX D OUT TX serial line debug monitor G*edge
3 DM_RX D IN RX serial line debug monitor G* edge
4 DM_RTS D OUT Request To Send debug monitor G*edge
5 DM_CTS D IN Clear To Send debug monitor G*edge
6 DATA_GS_TX D OUT Data transmission line in G* mode
7 DATA_GS_RX D IN Data reception line in G*mode
8 GSM_TX D OUT Data transmission and monitor line in GSM
mode
9 GSM_RX D IN Data reception and monitor line in GSM
mode
10 AXE D IN External device connection signal
11 SW_BATT A OUT Power supplied to external device con-
nected with AXE = 0 V
12 CAR_PCM_CLK D OUT CLOCK PCM connection to CAR KIT
13 CAR_PCM_DOUT D OUT Data OUT PCM connection to CAR KIT
14 CAR_PCM_DIN D IN Data IN PCM connection to CAR KIT
15 CAR_PCM_SYNC D OUT SYNC PCM connection to CAR KIT
16 GS/GSM D OUT Signalling for the DMUT operative mode
GSM or G*
17 ON–OFF D IN Signal for DMUT remote power on
18 CAR_AUDIO_IN D IN Analog audio from CAR KIT
19 CAR_AUDIO_OUT –––– Analog Audio to CAR KIT
20 GND A –––– Ground
21 NTC A –––– Pin used for reading the internal tempera-
ture of battery pack by an NTC or other
sensor.
22 GND A –––– Ground Battery pack
23 +VBATT –––– Positive Battery pack
24 SPARE ––––
Legend: A: Analog; D: Digital 0 3V CMOS