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27.1.1999
4H0700GB.__2
30
Product: TDP-52-SN3 (Sigma Gold) / OH0700
5.2.2.2 Radio Base Connector (printed circuit)
The Ext-hook switch is connected to the erp-line so that the erp-line dc level drops
when the handset is in its holder.
31 BMEM
input memory data-line from the bat-
tery
0/5V
32 nc
33 nc
34 MICINPUT microphone-line
35 nc
36 ISIGN battery voltage course indicator 0/5V
37 KEYLEDVB voltage for the led of keyboard 6V
38 IVBDET battery current indicator 0-5V
39 V-PROG battery charging voltage
40 V-PROG
1 SV-CHG battery charging voltage IN 2A
2 SV-CHG battery charging voltage IN 2A
3 VB 6 V output to accessories 0.5A
4V-PROG
FLASH PROM programming
voltage IN
0.5/12 VDC
5
SEXT-
MIC+PWR
external audio from the
microphone
400 mVrms
6GND
7GND
8
EXTERPX+
HOOK
external audio to the speaker
amplifier
220 mVrms
9 SCADET carbox identification 0/5V
10 SI2CINT i2c interrupt, radio input 0/5V
11 SSCL i2c clock 0/5V
12 SSDA i2c data 0/5V
13 STXD rs232 OUT 0/5V
14 SRXD rs232 IN 0/5V
15 SEXTIO reserve 0/5V
16 SCHGCONT charging control voltage
0...5VDG
analog