W83977ATF Datasheet, PDF (145/207 Pages) Winbond – WINBOND I/O

W83977ATF
PRELIMINARY
CR72 (Default 0x00)
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for GP11 as you set GP11 to be an alternate function
(Interrupt Steering).
CRE0 (GP10, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4: IRQ Filter Select
= 1 Debounce Filter Enabled
= 0 Debounce Filter Bypassed
Bit 3: Select Function.
= 1 Select Alternate Function: Interrupt Steering.
= 0 Select Basic I/O Function.
Bit 2: Reserved.
Bit 1: Polarity.
= 1 Invert.
= 0 No Invert.
Bit 0: In/Out selection.
= 1 Input.
= 0 Output.
CRE1 (GP11, Default 0x01)
Bit 7 - 5: Reserved.
Bit 4: IRQ Filter Select
= 1 Debounce Filter Enabled
= 0 Debounce Filter Bypassed
Bit 3: Select Function.
= 1 Select Alternate Function: Interrupt Steering.
= 0 Select Basic I/O Function.
Bit 2: Reserved.
Bit 1: Polarity.
= 1 Invert.
= 0 No Invert.
Bit 0: In/Out selection.
= 1 Input.
= 0 Output.
CRE2 (GP12, 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.
= 10 Reserved
= 11 Reserved
- 145 -
Publication Release Date:April 1998
Revision 0.52