W83977A Winbond Electronics Corp America, W83977A Datasheet - Page 119
W83977A
Manufacturer Part Number
W83977A
Description
Winbond I/O
Manufacturer
Winbond Electronics Corp America
Datasheet
1.W83977A.pdf
(160 pages)
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CRE1 (GP11, Default 0x01)
CRE2 (GP12, Default 0x01)
CRE3 (GP13, Default 0x01)
Bit 0: In/Out selection.
Bit 7 - 5: Reserved.
Bit 4: IRQ Filter Select
Bit 3: Select Function.
Bit 2: Reserved.
Bit 1: Polarity.
Bit 0: In/Out selection.
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
= 1 Input.
= 0 Output.
= 1 Debounce Filter Enabled
= 0 Debounce Filter Bypassed
= 1 Select Alternate Function: Interrupt Steering.
= 0 Select Basic I/O Function.
= 1 Invert.
= 0 No Invert.
= 1 Input.
= 0 Output.
= 00 Select Basic I/O function.
= 01 Select 1st alternate function:
= 10 Reserved
= 11 Reserved
= 00 Select Basic I/O function.
= 01 Select 1st alternate function: Power LED output.
= 10
= 11 Reserved
Reserved
-108-
Watch Dog
Timer Output.
Publication Release Date: March 1998
W83977TF
PRELIMINARY
Revision 0.62
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