w83977eg Winbond Electronics Corp America, w83977eg Datasheet - Page 100

• Manufacturer Part Number: w83977eg
• Description: Winbond Isa I/o W83977ef W83977eg
• Manufacturer: Winbond Electronics Corp America

12.7 Logical Device 7 (GP I/O Port I)
CR30 (Default 0x00)
CR60, CR 61 (Default 0x00, 0x00)
CR62, CR 63 (Default 0x00, 0x00)
1~8 byte boundary; They are available as you setting GP14 to be an alternate function (General
CR64, CR 65 (Default 0x00, 0x00)
1~8
CR70 (Default 0x00)
CR72 (Default 0x00)
CRE0 (GP10, Default 0x01)
Bit 7 - 1: Reserved.
Bit 0: = 1 Activates the logical device.
These two registers select GP1 I/O base address [0x100:0xFFF] on 1 byte boundary.
These two registers select GP14 alternate function Primary I/O base address [0x100:0xFFx] on
Purpose Address Decode).
These two registers select GP15 alternate function Primary I/O base address [0x100:0xFFx] on
Purpose Address Decode).
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for GP10 as you setting GP10 to be an alternate function
Bit 7 - 4: Reserved.
Bit 3 - 0: These bits select IRQ resource for GP11 as you setting GP11 to be an alternate function
Bit 7 - 5: Reserved.
Bit 4: IRQ Filter Select
Bit 3: Select Function.
Bit 2: Reserved.
Bit 1: Polarity.
Bit 0: In/Out selection.
= 0 Logical device is inactive.
byte boundary; They are available as you setting GP15 to be an alternate function (General
= 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.
(Interrupt Steering).
(Interrupt Steering).
W83977EF-AW/W83977EG-AW
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