Advertisement
1.4 COM
This interface can support RS-232 up to 4 ports and RS-422/485 up to 2 ports share
with RS-232. The transmitters/receivers of RS-232/422/485, which integrate ESD
protection, can reduce external ESD components. All the port functions can be
configured by BIOS setting before users make use of this interface.
1.4.1 Signal Descriptions
SMD
Name
Pin
COM1 422TX-
45
/485D-/DCD#
COM1 422TX+
47
/485D+/RXD
COM1 422RX+
49
/TXD
COM1 422RX-
51
/DTR#
53 GND
COM2 422TX-
55
/485D-/DCD#
COM2 422TX+
57
/485D+/RXD
COM2 422RX+
59
/TXD
COM2 422RX-
61
/DTR#
63 GND
46 COM1 DSR#
48 COM1 RTS#
50 COM1 CTS#
52 COM1 RI#
54 GND
56 COM2 DSR#
58 COM2 RTS#
60 COM2 CTS#
Pin Type
Refer to
RS232/RS422/RS485
Standard
GND
Refer to
RS232/RS422/RS485
Standard
GND
Refer to
RS232/RS422/RS485
Standard
GND
Refer to
RS232/RS422/RS485
Standard
13
Power Rail
Refer to
RS232/RS422/RS485
Standard
GND
Refer to
RS232/RS422/RS485
Standard
GND
Refer to
RS232/RS422/RS485
Standard
GND
Refer to
RS232/RS422/RS485
Standard
Description
422TX-/485D-/DCD#
422TX+/485D+/RXD
422RX+/TXD
422RX-/DTR#
GND
422TX-/485D-/DCD#
422TX+/485D+/RXD
422RX+/TXD
422RX-/DTR#
GND
DSR#
RTS#
CTS#
RI#
GND
DSR#
RTS#
CTS#
Advertisement
