W83977ATF Datasheet, PDF (153/207 Pages) Winbond – WINBOND I/O

W83977ATF
PRELIMINARY
CRE2 (GP32, Default 0x01)
Bit 7 - 4: Reserved.
Bit 3: Select Function.
= 1 Select Alternate Function: General Purpose Address Decode.
= 0 Select Basic I/O Function.
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE3 (GP33, Default 0x01)
Bit 7 - 4: Reserved.
Bit 3: Select Function.
= 1 Select Alternate Function: General Purpose Address Decode.
= 0 Select Basic I/O Function.
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE4 (GP34, Default 0x01)
Bit 7 - 4: Reserved.
Bit 3: Select Function.
= 1 Select Alternate Function: Watch Dog Timer output.
= 0 Select Basic I/O Function.
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE5 (GP35, Default 0x01)
Bit 7 - 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE6 (GP36, Default 0x01)
Bit 7 - 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE7 (GP37, Default 0x01)
Bit 7 - 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
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Publication Release Date:April 1998
Revision 0.52