W83977EF Winbond Electronics Corp America, W83977EF Datasheet - Page 109

• Manufacturer Part Number: W83977EF
• Description: Description = W83877TF Plus Kbc, GP I/O, Wake-Up, Power Fail Resume ;; Package = QFP 128
• Manufacturer: Winbond Electronics Corp America

CRE2 (GP12, Default 0x01)
CRE3 (GP13, Default 0x01)
CRE4 (GP14, Default 0x01)
CRE5 (GP15, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
Bit 2: Reserved.
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: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
Bit 7 - 6:
Bit 5: Reserved.
Bit 4 - 3: Select Function.
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
Bit 7 - 6:
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Watch Dog Timer Output.
= 10 Reserved
= 11 Reserved
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Power LED output.
= 10 Reserved
= 11 Reserved
= 00 Address decoder is 1-Byte boundary.
= 01 Address decoder is 2-Byte boundary.
= 10 Address decoder is 4-Byte boundary.
= 11 Address decoder is 8-Byte boundary.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: General Purpose Address Decoder(Active Low when
= 10 Select 2nd alternate function: Keyboard Inhibit(P17).
= 11 Reserved
= 00 Address decoder is 1-Byte boundary.
Bit 1 = 0, Decode two byte address).
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Publication Release Date: April 2003
W83977EF
Revision 1.1