Acrosser AMB-D255T1 - Manual (Page 12)

12
[18] Serial Port 2 Header（5*2 Pin 2.0 mm）
Pin Definition Pin Definition
1 JC2* 2 RXD
3 TXD 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
J_COM2
9 RI
[19] Serial Port 2 Control Header（4*1 Pin 2.00mm）
Settings Function
1-2 PIN1 Output :5V
JC2
2-3
PIN1 Output :DCD
(Default)
[20] Serial Port 3 Header（5*2 Pin 2.0 mm）
Pin Definition Pin Definition
1 JC3_P* 2 JC3_TTL1*(RXD)
3 JC3_TTL2*(TXD) 4 DTR
5 GND 6 DSR
7 RTS 8 CTS
J_COM3
9 N/C or JC3_P*
*Attention: The Pin9 output default value is ‘NC’ ， but it also can output 5V or 12V by
changing the hardware
（
please refer to JC_P
）。
[21] Serial Port 3 Control Header（3*1 Pin 2.54mm）
Header Settings Working Mode
JC3_TTL1 1-2、3-4
JC3_TTL2 1-2、3-4
RS-232（Default）
JC3_TTL1 2-3 JC3_TTL1
JC3_TTL2
JC3_TTL2 2-3
TTL
Settings Function
1-2 PIN1、9 Output :5V
2-3 PIN1、9 Output :12V
JC3_P
3-4 PIN1、9 NC（Default）