Terminal Descriptions

Universal connector

It is possible to use a resin-based cover for the Universal connector.

No.

Name

Description

Specification

I/O

1

SSW

Ext/Int Speaker Switch Input

Hi: INT, Low: EXT

I

 

 

 

 

 

2

SP+

BTL Output + for External Speaker

Standard load 8 Ω

O

 

 

 

 

 

3

SP-

BTL Output – for External Speaker

Standard load 8 Ω

O

 

 

 

 

 

4

MSW

Ext/Int MIC Switch Input

Hi: INT, Low: EXT

I

5

EMC

External MIC Input

Impedance: 1.8 kΩ

I

 

 

 

 

 

6

ME

External MIC GND

–

–

 

 

 

 

 

7

PTT

External PTT Input

Low: PTT ON

I

 

 

 

 

 

8

PF

Programable Function Key Input

Input voltage: 0 V - 3.3 V

I

 

 

 

 

 

9

OPT

Aux I/O Port (for EXT Option)

I: 0 V - 3.3 V

I/O

O: Standard load 25 kΩ

 

 

 

 

 

 

 

 

 

10

E

GND

GND

−

11

5V

5V

5V power supply output

O

Max output current: 140 mA

 

 

 

 

 

 

 

 

 

12

TXD

Serial Data Output

Baud rate: 115200 bps max

O

 

 

 

 

 

13

RXD

Serial Data Input

Baud rate: 115200 bps max

I

 

 

 

 

 

14

NC

Not used

–

–

Antenna Terminal

50 Ω impedance