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3-4
Pin
Pin Name
No.
1
USB+
2
USB-
3
VBUS
4
USB GND
5
APM2
6
APM1
7
SW B+
8
PWRGND
9
SPKR-
10
SPKR+
11
Tx Audio
12
Audio GND
13
AUX Audio 1
1
This pin must be connected to ground by jumper on accessory cable if emergency is disabled, even if disabled by
CPS. If enabled, this line must be grounded via a switch, which is normally closed. The emergency debounce time
is programmable via CPS.
2
Pulling this line to ground will activate PTT function, activating the AUX_MIC input.
3
Fixed level (independent of volume level) received audio signal, including alert tones. Flat or de-emphasis are pro-
grammed by CPS. Output voltage is approximately 100 mVrms per 1kHz of deviation. The DC offset is 1.4V.
4
This output is used to detect when a rear microphone accessory is taken off-hook, to override PL to alert the user
to busy traffic prior to transmitting.
5
This microphone signal is independent of the microphone signal on the front microphone connector. The nominal
input level is 80mVrms for 60% deviation when used for motorcycle, but can also support 300 mVrms for future
APCO accessories. The DC impedance is 660 ohms and the AC impedance is 560 ohms.
6
See
Table 2-1
in Chapter 2 for wiring options.
Note: Please see the XPR 4300/4350/4500/4550 Basic Service manual (Motorola publication part number
6816816H01) for more detailed descriptions of these pins.
March 23, 2006
Options and Accessories Installation: Dash-Mount Accessory Installation
Table 3-1. Rear Accessory Jack Pin Functions
Pin Function
USB + (Data)
USB - (Data)
USB Power (5V from USB
accessory/cable)
USB/APM Ground
One Wire Data
One Wire Data
Switched Battery Voltage
Ground
Speaker - (3.2 ohm minimum
impedance)
Speaker + (3.2 ohm
minimum impedance)
Rear External Microphone
5
Input
Audio Ground
PUBLIC Address 1
Pin
Pin Name
No.
14
Rx Audio
Receive Live Audio 3
15
AUX Audio 2
PUBLIC Address 2
16
GND
Ground
17
GPS-1(PTT)
5V Level GPIO, PTT Input
18
GND
Ground
19
GPS-2(Monitor) 5V Level GPIO, Monitor
Input
20
GPS-6
5V Level GPIO
21
GPS-3
5V Level GPIO, Channel
Activity Function
22
GPS-7
5V Level GPIO
23
EMERGENCY
Emergency Switch Input 1
24
GPS-7
5V Level GPIO
25
IGN SENSE
Ignition Sense
26
VIP-1
12V Tolerant, 5V GPIO,
External Alarm
Pin Function
1
2
6
6816812H01