w83977atf Winbond Electronics Corp America, w83977atf Datasheet - Page 10

• Manufacturer Part Number: w83977atf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1.2 General Purpose I/O Port
GP20
(KBRST)
GP21
(P13)
P16
GP22
(P14)
GP23
(P15)
GP24
(P16)
P13
CIRRX
GP25
(GA20)
IRRXH
IRSL0
PANSWOUT
PANSWIN
SMI
SYMBOL
PIN
69
70
72
73
40
39
OUT
I/O
OD
I/O
I/O
OD
I/O
I/O
I/O
I/O
I/O
IN
I/O
IN
IN
12t
12t
12t
12t
12t
12t
12t
12t
12
12
12
t
t
12t
General purpose I/O port 2 bit 0.
Alternate Function from GP20: Keyboard reset. (KBC P20)
System Management Interrupt. (CR2B bit 4_3 = 00, default)
In the legacy power management mode, SMI
the power managenment events.
General purpose I/O port 2 bit 1. (CR2B bit 4_3 = 01)
Alternate Function from GP21: KBC P13 I/O port.
KBC P16 I/O port. (CR2B bit 4_3 = 10)
Panel Switch output. (CR2B bit 5 = 0, default)
General purpose I/O port 2 bit 2. (CR2B bit 5 = 1)
Alternate Function from GP22: KBC P14 I/O port.
Panel Switch input. (CR2B bit 7_6 = 00, default)
General purpose I/O port 2 bit 3. (CR2B bit 7_6 = 01)
Alternate Function from GP23: KBC P15 I/O port.
General purpose I/O port 2 bit 4.
Alternate Function from GP24: KBC P16 I/O port.
KBC P13 I/O port. (CR2A bit 5_4 = 10)
Consumer IR receiving input. (CR2A bit 5_4 = 00)
General purpose I/O port 2 bit 5. (CR2A bit 3_2 = 10)
Alternate Function from GP25: GATE A20. (KBC P21)
FIR receiving input. (CR2A bit 3_2 = 00)
IR module select 0. (CR2A bit 3_2 = 01)
-9 -
FUNCTION
Publication Release Date: April 1998
(CR2A bit 5_4 = 01)
W83977ATF
PRELIMINARY
is driven
Revision 0.52
low by