Motorola Crib Toy MTM5400 User Manual

58

MTM5400 Mobile Terminal Installation Manual

INSTALLATION

Connectors and Pin Assignment of the Radio

Transceiver Rear Side - Pin Function

Figure 25  Location of Accessory Connector - Rear Side

This section gives a description of the Accessory Connector pin functions.

The accessory connections shown are not compatible to 
some other models of Motorola radios. Check the 
appropriate accessory or technical manual for further 
information.

Table 9  26-Pin Accessory Connector

Pin

Function

Description

1

UART1_TXD / 
USBx_D+

USB 1.1 – Default Host

RS232 or UART2 – Alternative Setting

2

UART1_RXD / 
USBx_D-

3

UART1_RTS / 
USBx_VBUS

4

GND_USBx

5

1-WIRE

1-Wire standard port (pulled via 2K2 to 5V inside U600) 

6

KEYFAIL / FLASH

Key load (pulled via 10K to 5V)
Flash input (>10V will trigger Flash mode)

7

SWB +

A+ voltage (limited to 14V) with 1A current limitation

8

GND_MAIN

Main and power ground

9

SPEAKER-

Loudspeaker (PA) output – (NOT TO BE GROUNDED!)

10

SPEAKER+

Loudspeaker (PA) output +

11

TX_AUDIO

TX audio output

12

GND_ANA

Main audio ground

13

MIC1 / EXT_MIC

Ext mic input / MIC1 for noise cancelling dual mic input

*Note the location of Pin 1

Accessory Connector

2

26

1

25