W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 122
W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
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CRE8 (GP20, Default 0x01)
CRE9 (GP21, Default 0x01)
CREA (GP22, 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 2: Int En
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output¡ @¡ @
= 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
= 1
= 0
Enable Common IRQ
Enable Common IRQ
Enable Common IRQ
Disable Common IRQ
Disable Common IRQ
Disable Common IRQ
-111-
Publication Release Date: March 1998
W83977TF
PRELIMINARY
Revision 0.62
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