W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 146
W83977AF
Manufacturer Part Number
W83977AF
Description
W83877TF Plus Kbc, Cir, RTC
Manufacturer
Information Storage Devices, Inc
Datasheet
1.W83977AF.pdf
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10.9 Logical Device 7 (Auxiliary I/O Part I)
CR30 (Default 0x00)
CR31
CR60, CR 61 (Default 0x00, 0x00)
CR62, CR 63 (Default 0x00, 0x00)
CR64, CR 65 (Default 0x00, 0x00)
CR70 (Default 0x00)
CR71 (Default 0x02, read only)
CR72 (Default 0x00)
CR73 (Default 0x02)
Bit 7-1 : Reserved.
Bit 0 : = 1 Activates the logical device.
Bit 7-2 : Reserved.
Bit 1 : ENRNGCK -- > Enable I/O Range check
Bit 0 : FORIORD --> Forces LDN to respond I/O read
These two registers select GP1 I/O base address [0x100:0xFFF] on 1 byte boundaries.
These two registers select GP14 alternate function Primary I/O base address [0x100:0xFFE] on 2
byte boundaries; 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 boundaries; 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 7-2 : Reserved.
Bit 1 : IRQLEV -- > IRQ Level
Bit 0 : IRQTYPE --> IRQ Type
Bit 7-4 : Reserved.
Bit 3-0 : These bits select IRQ resource for GP11 as you setting GP10 to be an alternate function
Bit 7-2 : Reserved.
Bit 1 : IRQLEV -- > IRQ Level
Bit 0 : IRQTYPE --> IRQ Type
= 0 Logical device is inactive.
= 1: High; = 0: Low
= 1: Level trigger; = 0: Edge trigger
= 1: High; = 0: Low
= 1: Level trigger; = 0: Edge trigger
(Interrupt Steering).
(Interrupt Steering).
- 134 -
W83977F/ W83977AF
Publication Release Date: March 1998
PRELIMINARY
Revision 0.58
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