w83977f Winbond Electronics Corp America, w83977f Datasheet - Page 151

• Manufacturer Part Number: w83977f
• Description: Plug & Play 1.0a Compliant
• Manufacturer: Winbond Electronics Corp America

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 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 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
= 00 Select Basic I/O function
= 01 Reserved
= 10 Select 2nd alternate function : Keyboard P15 I/O
= 11 Reserved
= 1
= 0
Enable Common IRQ
Disable Common IRQ
Enable Common IRQ
Disable Common IRQ
Enable Common IRQ
Disable Common IRQ
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W83977F/ W83977AF
Publication Release Date: March 1998
PRELIMINARY
Revision 0.58