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14. Serial port connectors (10-1 pin COM1, COM3~COM6)
These connectors are for serial (COM) ports. Connect the serial port module
cable to this connector, then install the module to a slot opening at the back
of the system chassis.
EMB-BT1 Serial port connector
NOTE:
•
The COM module is purchased separately.
•
COM1 also supports RS-232 / RS-422 / RS-485. See the table below and
section 3.3.2 Super IO Configuration for details.
Pin
Signal
1
DCD (422TXD-/485DATA-)
3
TXD (422TXD+/485DATA+)
5
GND
7
RTS
9
RI/+12V/+5V
Chapter 2: Motherboard information
COM1
COM3
PIN 1
PIN 1
Pin
2
4
6
8
10
COM4
PIN 1
COM5
PIN 1
COM6
PIN 1
Signal
RXD (422RXD+)
DTR (422RXD-)
DSR
CTS
N.C.
2-21
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