W83977AF Information Storage Devices, Inc, W83977AF Datasheet - Page 150

• Manufacturer Part Number: W83977AF
• Description: W83877TF Plus Kbc, Cir, RTC
• Manufacturer: Information Storage Devices, Inc

10.10
CR30 (Default 0x00)
CR31
CR60, CR 61 (Default 0x00, 0x00)
CR70 (Default 0x00)
CR71 (Default 0x02)
CR72 (Default 0x00)
CR73
CRE8 (GP20, Default 0x01)
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 GP2 & Watch Dog I/O base address [0x100:0xFFE] on 2 byte
boundaries. I/O base address + 1 : Watch Dog I/O base address.
Bit 7-4 : Reserved.
Bit 3-0 : These bits select IRQ resource for Common IRQ of GP20~GP25 at Logic Device 9.
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 Watch Dog.
Bit 7-2 : Reserved.
Bit 1 : IRQLEV -- > IRQ Level
Bit 0 : IRQTYPE --> IRQ Type
Bit 7-5 : Reserved.
Bit 4-3 : Select Function.
Bit 2 : Int En
Bit 1 : Polarity : 1 : Invert, 0 : No Invert
Bit 0 : In/Out : 1 : Input, 0 : Output
Logical Device 8 (Auxiliary I/O Part II)
= 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
= 00 Select basic I/O function
= 01 Reserved
= 10 Select alternate function : Keyboard Reset (connected to KBC P20)
= 11 Reserved
= 1
= 0
Enable Common IRQ
Disable Common IRQ
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W83977F/ W83977AF
Publication Release Date: March 1998
PRELIMINARY
Revision 0.58