Com Pin Header For Com2~Com4 - VIA Technologies EPIA-M920 User Manual

2.2.11.

COM Pin Header for COM2~COM4

There are a total of three COM pin headers on the mainboard. 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 support +5V or +12V.
The pinout of the COM pin headers are shown below.
Figure 25 Figure 25: COM pin header diagrams : COM pin header diagrams
Figure Figure 25 25 : COM pin header diagrams : COM pin header diagrams
Table 21 Table 21: COM pin header pinout : COM pin header pinout
Table Table 21 21 : COM pin header pinout : COM pin header pinout
Pin Pin Signal Signal
Pin Pin Signal Signal
1 COM_DCD
3 COM_TXD
5 Ground
7 COM_RTS
9 COM_RI
EPIA- - - - M920 EPIA
EPIA EPIA
Pin Pin Signal Signal
Pin Pin Signal Signal
2 COM_RXD
4 COM_DTR
6 COM_DSR
8 COM_CTS
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