w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 17

• Manufacturer Part Number: w83977ctf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

1.1 Host Interface, continued
1.2 General Purpose I/O Port
PWR_CTL#
GP20
(KBRST)
SMI #
GP21
(P13)
P16
PANSWOT#
GP22
(P14)
IRQ14
GP14
(GPACS1#)
(P17)
PLEDO
IRQ15
GP15
(GPACS2#)
(P12)
WDT
CLKIN
SYMBOL
SYMBOL
PIN
PIN
103
104
69
70
72
1
OUT
OUT
OUT
OUT
OD
I/O
OD
OD
I/O
I/O
I/O
I/O
I/O
I/O
I/O
IN
16tu
16u
12t
12t
12t
12t
12t
12t
12t
t
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.
Power supply control
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# is drive low by the
power management 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.
-8 -
FUNCTION
FUNCTION
Publication Release Date: March 1999
W83977EF/ CTF
PRELIMINARY
Revision A1