F81218
7:1
0
Reserved
URD_EN
R/W
R/W
Return 0 when read.
0 : Disable UART 4.
1 : Enable UART 4.
6.5.2 I/O Port Select Register – index 60h
Power-on default [7:0] = 0x02h when SOUT4/PS_2E8_IRQD is pull-up, else 0x00h.
Bit
7:0
Name
R/W
Description
UART 4 I/O Port Address high byte.
URD_BASE[15:8] R/W
6.5.3 I/O Port Select Register – index 61h
Power-on default [7:0] = 0xE8h when SOUT4/PS_2E8_IRQD is pull-up, else 0x00h.
Bit
7:0
Name
R/W
Description
UART 4 I/O Port Address low byte.
URD_BASE[7:0]
R/W
6.5.4 IRQ Channel Select Register – index 70h
Power-on default [7:0] = 0x09h when SOUT4/PS_2E8_IRQD is pull-up, else 0x00h.
Bit
7:6
5
Name
Reserved
URDIRQ_MODE
R/W
Description
R/W
R/W
Return 0 when read.
0 : PCI IRQ sharing mode
1 : ISA IRQ sharing mode.
This bit is effective in IRQ sharing mode.
0 : IRQ is not sharing with other device.
1 : IRQ is sharing with other device.
4
URDIRQ_SHAR
R/W
3:0
SELURDIRQ[3:0] R/W
In LPC mode , select the Serial IRQ channel.
In ISA mode , select one of six IRQ pins .
03h : use serial IRQ channel 3 in LPC mode or use ISA_IRQA in ISA
mode.
04h : use serial IRQ channel 4 in LPC mode or use ISA_IRQB in ISA
mode.
05h : use serial IRQ channel 5 in LPC mode or use ISA_IRQC in ISA
mode.
09h : use serial IRQ channel 9 in LPC mode or use ISA_IRQD in ISA
mode.
-33-
August, 2007
V0.33P
FINTEK [ FEATURE INTEGRATION TECHNOLOGY INC. ]
