VIA EPIA-M930 User Manual
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2.2.9
COM Pin Headers
There are two COM pin headers on the VIA EPIA-M930. Each COM pin header supports the RS-232 standard.
The pin headers are labeled as “COMH1” (COM3) and “COMH2” (COM4). Both of the COM pin headers can
s5V or +12V. The pinouts of the COM pin headers are shown below.
1
COMH2
1
1
COMH1
1
Figure 22: COM pin headers diagram
COM3
COM4
Pin
Signal
Pin
Signal
Pin
Signal
Pin
Signal
1
COM_DCD
2
COM_RXD
1
COM_DCD
2
COM_RXD
3
COM_TXD
4 COM_DTR
3
COM_TXD
4 COM_DTR
5 GND
6
COM_DSR
5 GND
6
COM_DSR
7 COM_RTS
8 COM_CTS
7 COM_RTS
8 COM_CTS
9
COM_RI
10 —
9
COM_RI
10 —
Table 20: COM pin headers pinouts
2.2.10
Front Audio Pin Header
In addition to the TRS audio jacks on the external I/O coastline, the VIA EPIA-M930 has a pin header for Line-
out and Mic-in. The pin header is labeled as “F_AUDIO1”. The pinouts of the front audio pin header are shown
below.
1
F_AUDIO1
1
Figure 23: Front audio pin header
