w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 124
w83977ctf
Manufacturer Part Number
w83977ctf
Description
Winbond I/o
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977CTF.pdf
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CREC (GP24, Default 0x01)
CRED (GP25, Default 0x01)
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 - 4: Reserved.
Bit 3: Select Function.
Bit 2: Int En
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
= 01 Reserved
= 10 Select 2nd alternate function: Keyboard P15 I/O
= 11 Reserved
= 1
= 0
= 00 Select Basic I/O function
= 01 Reserved
= 10 Select 2nd alternate function: Keyboard P16 I/O
= 11 Reserved
= 1
= 0
= 1 Select alternate function: GATE A20(Connect to KBC P21).
= 0 Select basic I/O function
= 1
= 0
Enable Common IRQ
Disable Common IRQ
Enable Common IRQ
Disable Common IRQ
Enable Common IRQ
Disable Common IRQ
-115 -
Publication Release Date: March 1999
W83977EF/ CTF
PRELIMINARY
Revision A1
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