w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 123

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

CRE8 (GP20, Default 0x01)
CRE9 (GP21, Default 0x01)
CREA (GP22, Default 0x01)
CREB (GP23, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
Bit 2: Int En
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
Bit 7 - 5: Reserved
Bit 4 - 3: Select Function.
Bit 2: Int En
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output ¡@¡@
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select basic I/O function
= 01 Reserved
= 10 Select alternate function: Keyboard Reset (connected to KBC P20)
= 11 Reserved
= 1
= 0
= 00 Select Basic I/O function
= 01 Reserved
= 10 Select 2nd alternate function: Keyboard P13 I/O
= 11 Reserved
= 1
= 0
= 00 Select Basic I/O function.
= 01 Reserved
= 10 Select 2nd alternate function: Keyboard P14 I/O.
= 11 Reserved
Bit 2: Int En
= 1
= 0
= 00 Select Basic I/O function
Enable Common IRQ
Disable Common IRQ
Enable Common IRQ
Disable Common IRQ
Enable Common IRQ
Disable Common IRQ
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Publication Release Date: March 1999
W83977EF/ CTF
PRELIMINARY
Revision A1