W83626F Datasheet, PDF (10/34 Pages) Winbond – LPC-to-ISA Bridge

LPC TO ISA BRIDGE SET
W83626F/W83626D
PRELIMINARY
K/B , GPIO AND 80h PCS# Function
SYMBOL PIN
I/O
FUNCTION
80PCS#
36 I/OD12t 80h PORT Chip Select.(Default)
KBEN#
ROMCS#
GPIO0
K/B Functions Enable. During power-on reset this pin is weak
pulled-up internally. The pin applied a pull-down resistor (4.7K
ohm) to enable K/B functions. (IRQ1,KBCS#,and MCCS#)
37 I/OD12t ROMCS#, this pin enable positive decoder of BIOS address range
[depend on CR03 ,bit 1 or external weak pulled-up during PCIRST
is asserted] .
38 I/OD12t General purpose I/O pin 0.
IRQ1
GPIO1
Parallel Interrupt Requested Input 1. This interrupt request is used
for specific K/B functions.
39 I/O12t General purpose I/O pin 1.
KBCS#
GPIO2
Decode the address 60h and 64h to output chip selected signal.
Enable by KBEN# power-on setting.
40 I/OD12t General purpose I/O pin 2.
MCCS#
GPIO3
Decode the address 62h and 66h to output chip selected signal
Enable by KBEN# power-on setting
62 I/OD12t General purpose I/O pin 3.
IRQIN
GPIO4
Programmable parallel IRQ input transfers to serial IRQ
Enable by KBEN# power-on setting
63 I/OD12t General purpose I/O pin 4.
PLED
GPIO5
Power LED output, this signal is low after system reset.
64 I/OD12t General purpose I/O pin 5.
IRQ8
GPIO6
Parallel Interrupt Requested Input 8. This interrupt request is used
for specific RTC functions. Enable by RTCEN# power-on setting
65 I/OD12t General purpose I/O pin 6.
RTCCS#
GPIO7
Decode the address 70h and 71h to output chip selected signal
Enable by RTCEN# power-on setting
66 I/OD12t General purpose I/O pin 7.
IOHCS#
Decode SA[15-11] are all 0 and setting by CR04 Bit 6.
Publication Release Date: Feb 2000
-8-
Revision 0.50