W83977EF Datasheet, PDF (110/150 Pages) Winbond – WINBOND I/O

W83977EF
= 01 Address decoder is 2-Byte boundary.
= 10 Address decoder is 4-Byte boundary.
= 11 Address decoder is 8-Byte boundary.
Bit 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 General Purpose Write Strobe(Active Low when Bit 1 = 0).
= 10 8042 P12.
= 11 Reserved
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE6 (GP16, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Watch Dog Timer Output.
= 1x Reserved
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
CRE7 (GP17, Default 0x01)
Bit 7 - 4: Reserved.
Bit 4 - 3: Select Function.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Power LED output. Please refer to TABLE C
= 1x Reserved
Bit 2: Reserved.
Bit 1: Polarity: 1: Invert, 0: No Invert
Bit 0: In/Out: 1: Input, 0: Output
TABLE C
WDT_CTRL1* BIT[1]*
1
0
WDT_CTRL0* BIT[3]
X
0
WDT_CTRL1 BIT[0] POWER LED STATE
X
1 Hertz Toggle pulse
X
Continuous high or low*
-104 -
Publication Release Date: April 2003
Revision 1.1