2 serial ports(com1~4) – Acrosser AR-B1851 User Manual

Page 14

background image

AR-B1851 User’s Guide

AR-B1851

14

3.2 Serial Ports(COM1~4)

The AR-B1851 offers two high speeds NS16C550 compatible UARTs
with Read/Receive 16 byte FIFO serial ports.

• COM2 : RS-232 Serial port (Pin Header)

• COM1 : RS-232 with RS-422/485 Serial port(Pin Header)

PIN DESCRIPTION PIN DESCRIPTION

1

-DCD

2

-DSR

3 RXD 4 -RTS
5

TXD

6

-CTS

7 -DTR 8 -RI
9 GND 10

NC

PIN DESCRIPTION PIN DESCRIPTION

1

-DCD

2

-DSR

3 RXD 4 -RTS
5

TXD

6

-CTS

7 -DTR 8 -RI
9 GND 10

GND

11 TX+ 12

TX-

13 RX+ 14

RX-