User`s manual

45 Chapter 3
3.6.14 Onboard Serial Port 1 ~ 6
Please refer to the below COM port IRQ and I/O address assignment,
inappropriate assignment may cause unexpected resource conflict.
3.6.15 UART Mode Select
This item allows you to select UART mode. The choices: "IrDA",
"ASKIR", "Normal".
3.6.16 RxD, TxD Active
This item allows you to determine the active of RxD, TxD. The Choices:
“Hi, Hi,” “Lo, Lo,” “Lo, Hi,” “Hi, Lo.”
3.6.17 IR Transmission Delay
This item allows you to enable/disable IR transmission delay. The
choices: "Enabled", "Disabled".
3.6.18 UR2 Duplex Mode
This item allows you to select the IR half/full duplex function. The
choices: "Half", "Full".
3.6.19 Use IR Pins
The Choice : "RxD2, TxD2", "IR-Rx2Tx2".
Table 3.1: COM Port IRQ Assignment
COM Port IRQ
COM 1
COM 2
IRQ 3 / IRQ 4
COM 3
COM 4
COM 5
COM 6
IRQ 5 / IRQ 10 /
IRQ 11
Table 3.2: COM Port I/O Address
COM Port I/O Address
COM 1
COM 2
COM 3
COM 4
3F8h / 3E8h /
2F8h / 2E8h
COM 5
COM 6
4F8h / 4E8h