W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 147
W83977AF
Manufacturer Part Number
W83977AF
Description
W83877TF Plus Kbc, Cir, RTC
Manufacturer
Information Storage Devices, Inc
Datasheet
1.W83977AF.pdf
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CRE0 (GP10, Default 0x01)
CRE1 (GP11, Default 0x01)
CRE2 (GP12, Default 0x01)
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 : 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
= 0 Debounce Filter Bypassed
= 1 Debounce Filter Enabled
= 1 Select Alternate Function : Interrupt Steering.
= 0 Select Basic I/O Function.
= 1 Invert.
= 0 No Invert.
= 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 : Watching Dog Timer Output.
= 10 Reserved
= 11 Reserved
- 135 -
W83977F/ W83977AF
Publication Release Date: March 1998
PRELIMINARY
Revision 0.58
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