Motorola MTM700 Detailed Service Manual page 319

CONNECTOR PIN FUNCTIONS
6 DSR
7 RTS
8 CTS
9 RI
Table 24 Pin Assignment of 9 Pin subD Connector of the Expansion Head
Pin Function
1 GND
2 RS232_SCI_TX
3 RS232_SCI_RX
4 RS232_RTS
5 RS232_CTS
6 FLT_A+
7 Signal_GND
8 SB9600_BUSY
9 NC
10 NC
11 NC
12 SW_B+
13 SB9600_BUS-
14 ON_OFF_CONTROL /
FLASH_MODE
15 SB9600_BUS+
16 INT_MIC
17 SB9600_RESET
18 NC
19 GROUND
20 IGNITION
21 ON_OFF_GND
22 EXPANSION_PTT
23 SB9600_SW
24 HANDSET_AUDIO
25 NC
Table 25 Pin Assignment of the 25 Pin subD Connector of the Expansion Head
MTM700 Mobile Radio / Detailed Service Manual
Data Set Ready
Request to Send
Clear to Send
Ring Indicator
Description
Ground
Transceiver data (RS232 line with RS232 level)
Receive data (RS232 line with RS232 level)
Request to Send (RS232 line with RS232 level)
Clear to Send (RS232 line with RS232 level)
Filtered unswitched UB+ / 200mA
Ground for RS232
SB9600 busy
Not Connected
Not Connected
Not Connected
Switched UB+ / 100mA
SB9600 BUS-
-Switch into flash mode (connect pin14 with 6)
-On/Off control for Std. Control Head
SB9600 BUS+
Microphone analogue input of 80mVRMS, 600ohm impedance, 9V=
Reset; its a output to reset a SB9600 device
Not Connected
Ground
Connecting this pin to the ignition line of the vehicle that will automati-
cally turn on the radio if ignition of the vehicle is turned on. High active;
On/Off control for Control Head "J"(MTM300 C/H)
Expansion PTT, works together with INT_MIC
switched into SB9600 mode if connected to 12V
Handset audio to earpiece impedance has to be > 200 Ohm
Not Connected
A - 9
Input
Output
Input
Input