W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 15

• Manufacturer Part Number: W83977A
• Description: Winbond I/O
• Manufacturer: Winbond Electronics Corp America

1.1 Host Interface, continued
1.2 General Purpose I/O Port
GP20
(KBRST)
GP21
(P13)
P16
GP22
(P14)
GP23
(P15)
GP24
(P16)
P13
GP25
(GA20)
IRQ14
GP14
( GPACS )
(P17)
PLEDO
IRQ15
GP15
( GPAWE )
(P12)
WDT
CLKIN
SMI
PANSWOUT
PANSWIN
SYMBOL
SYMBOL
PIN
103
104
PIN
69
70
72
73
40
39
1
OUT
OUT
OUT
OUT
OUT
OUT
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IN
I/O
I/O
IN
12t
12t
12t
12t
12t
12t
12t
12t
12t
12t
12
t
12t
12t
12t
12t
12t
12t
Interrupt request 14. (CR2C bit 1_0 = 00, default)
General purpose I/O port 1 bit 4. (CR2C bit 1_0 = 01)
Alternate Function 1 from GP14: General purpose address
decode output.
Alternate Function 2 from GP14: KBC P17 I/O port.
Power LED output. (CR2C bit 1_0 = 10)
Interrupt request 15.(CR2C bit 3_2 = 00, default)
General purpose I/O port 1 bit 5. (CR2C bit 3_2 = 01)
Alternate Function 1 from GP15: General purpose address write
enable output.
Alternate Function 2 from GP15: KBC P12 I/O port.
Watch-Dog timer output. (CR2C bit 3_2 = 10)
24 or 48 MHz clock input, selectable through bit 5 of CR24.
General purpose I/O port 2 bit 0.
Alternate Function from GP20: Keyboard reset (KBC P20)
For the power management, the SMI
management events, that generate and SCI in ACPI mode.
(CR2B bit 4_3 = 00, default)
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)
General purpose I/O port 2 bit 5.
Alternate Function from GP25: GATE A20 (KBC P21)
-7 -
FUNCTION
FUNCTION
(CR2A bit 5_4 = 01)
Publication Release Date: April 1998
is active
W83977TF
PRELIMINARY
low by the power
Revision 0.62