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27.1.1999
4H0700GB.__2
29
Product: TDP-52-SN3 (Sigma Gold) / OH0700
5.2 KEYBOARD
OH0700 Keyboard
5.2.1 General
Keyboard unit includes: key matrix, battery current measuring components, radio
base connector, battery connectors and microphone.
5.2.2 Connectors:
5.2.2.1 Processor / audio module, V101 40 pin connector
1 VB power supply from battery 6V
2VB
3VB
4VB
5VB
6 EXTMIC external audio from the microphone 400 mVrms
7 EXTERP
external audio to the speaker ampili-
fier
220 mVrms
8 CADET carbox identification 0/5V
9 I2CINT i2c interrupt, radio input 0/5V
10 SGL i2c clock 0/5V
11 SDA i2c data 0/5V
12 TXD rs232 out 0/5V
13 RXD rs232 in 0/5V
14 EXTIO reserve 0/5V
15 CHGCONT charging control voltage 0...4.2V
16 GND ground
17 GND
18 GND
19 GND
20 GND
21 XKEYINP0 key matrix input 0/5V
22 XKEYINP1
23 XKEYINP2
24 XKEYINP3
25 XKEYINP3
26 XKEYOUT0 key matrix output 0/5V
27 XKEYOUT1
28 XKEYOUT2
29 XKEYOUT3
30 CHGIND charging voltage indicator 0/5V