2.2.10 COM Port
The system provides four COM ports for communicating with external devices. These COM
ports are implemented using industrial-grade ITE8786 Super IO chip (-40 to 85°C) and
provide up to 115200 bps baud rate.
COM1 and COM2 are software-configurable RS-232/422/485 ports. COM3 and COM4 are
standard 9-wire RS-232 ports. The operation mode of COM1 and COM2 can be set in BIOS
setup utility. The following table describes the pin definition of COM ports.
COM Port Pin Definition
COM1 & COM2
COM3 & COM4
Pin#
RS-232
Mode
RS-422 Mode
RS-485 Mode
(Two-wire 485)
RS-232 Mode
1
DCD
DCD
2
RX
422 TXD+
485 TXD+/RXD+
RX
3
TX
422 RXD+
TX
4
DTR
422 RXD-
DTR
5
GND
GND
GND
GND
6
DSR
DSR
7
RTS
RTS
8
CTS
422 TXD-
485 TXD-/RXD-
CTS
9
RI
RI
20
Содержание FES7501
Страница 11: ...1 2 Dimension NOTE All measurements are in millimeters mm 1 2 1 Top View 1 2 2 Front View 11...
Страница 12: ...1 2 3 Back View 1 2 4 Side View 12...
Страница 39: ...8 With the four motherboard standoffs aligned gently lower the motherboard onto the heatsink 39...
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