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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
O: Standard load 25 kΩ
I/O
10 E GND GND
−
11 5V 5V
5V power supply output
Max output current: 140 mA
O
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