Com Pin Headers; Figure 21: Com Pin Headers Diagram; Table 17: Com Pin Header Pinouts - VIA Technologies VB7009 User Manual

2.2.9. COM Pin Headers

There are COM pin headers on the VIA VB7009 in addition to the COM port 1 on the external I/O. Each
COM pin header supports RS-232 standard. The COM pin headers labeled as "COM2, COM3 and COM4"
are available in the VB7009-16 and VB7009-10E SKUs, while the additional "COM5" and "COM6" pin
headers are offered only by VB7009-12QCE SKUs. All the COM pin headers can support +5V or +12V.
See page 32 for details on setting the voltage. The pinouts of the COM pin headers are shown below.

Figure 21: COM pin headers diagram

Pin
1
3
5
7
9

Table 17: COM pin header pinouts

Signal Pin
COM_DCD 2 COM_RXD
COM_TXD 4 COM_DTR
GND 6 COM_DSR
COM_RTS 8 COM_CTS
COM_RI 10 Key
VIA VB7009 User Manual
Signal
20