THEORY OF OPERATION: Digital Section
34
IDEN OEM Accessory Connector Interface (J4)
Table 15. Accesory Connector Pin Functions
PIN N0
PIN NAME
DIRECTION
DESCRIPTION
1
RS232_RX
OUT
RS232 Signal
2
RS232_TX
IN
RS232 Signal
3
RS232_DTR
IN
RS232 Signal
4
RS232_DCD
OUT
RS232 Signal
5
RS232_GND
Signal
Ground
6
RS232_RTS
IN
RS232 Signal
7
RS232_CTS
OUT
RS232 Signal
8
RS232_DSR
OUT
RS232 Signal
9
RS232_R1
OUT
RS232 Signal
10
EXT_MIC
IN
Audio Input to OEM
11
AUDIO _COMMON
Analog Ground
12
AUDIO_OUT
OUT
Audio Out from OEM
13
OPT_SELECT_1
I/O (10-27K pull-up)
OEM Configuration
14
OPT_SELECT_2
I/O (10-27K pull-up)
OEM Configuration
15
MUX_CNTL
IN (100K pull-down)
Logic “0” (Manufacture use)
16
Option _3V
Regulated 3 V Output
17
OEM ON-OFF
IN
Power On/OFF
18
MOD
In (22K pull-down)
Programming signal
19
BAT_VCC
3.6V OEM operation voltage
20
BAT_VCC
Supply Voltage
21
BAT_VCC
Supply Voltage
22
BAT_VCC
Supply Voltage
23
BAT_VCC
Supply Voltage
24
RED_LED
OUT
Out-of range indication
25
GREEN_LED
OUT
In-range indication
26
BAT_GND
Ground
27
BAT_GND
Ground
28
BAT_GND
Ground
29
BAT_GND
Ground
30
BAT_GND
Ground
