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VIA EPIA-M920 User Manual
23
2.2.11.
COM Pin Header
There are a total of three COM pin headers on the VIA EPIA-M920. Each COM pin header supports the
RS-232 standard. The pin headers are labeled as “COM2”, “COM3”, and “COM4”. All of the COM pin
headers can s5V or +12V. The pinouts of the COM pin headers are shown below.
COM3
1
COM2
1
COM4
1
Figure 25: COM pin header diagram
Pin
Signal
Pin
Signal
1
COM_DCD
2
COM_RXD
3
GND
4
COM_DTR
5
GND
6
COM_DSR
7
COM_RTS
8
COM_CTS
9
COM_RI
10 —
Table 22: COM pin header pinouts