w83977tf Winbond Electronics Corp America, w83977tf Datasheet - Page 118

• Manufacturer Part Number: w83977tf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

11.7 Logical Device 7 (GP I/O Port I)
CR30 (Default 0x00)
CR60, CR 61 (Default 0x00, 0x00)
CR62, CR 63 (Default 0x00, 0x00)
CR64, CR 65 (Default 0x00, 0x00)
CR70 (Default 0x00)
CR72 (Default 0x00)
CRE0 (GP10, Default 0x01)
Bit 1: = 0 Gate20 software control.
Bit 0: = 0 KBRST software control.
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 [0x100:0xFFE] on 2
byte boundary; They are available as you setting GP14 to be an alternate function (General
Purpose Address Decode).
These two registers select GP15 alternate function Primary I/O base address [0x100:0xFFF] on 1
byte boundary; They are available as you setting GP15 to be an alternate function (General
Purpose Write 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
Bit 7 - 5: Reserved.
Bit 4: IRQ Filter Select
Bit 3: Select Function.
Bit 2: Reserved.
Bit 1: Polarity.
= 1 Gate20 hardware speed up.
= 1 KBRST hardware speed up.
= 0 Logical device is inactive.
= 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.
(Interrupt Steering).
(Interrupt Steering).
-107-
Publication Release Date: March 1998
GP11
to be an alternate function
W83977TF
PRELIMINARY
Revision 0.62