W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 148

• Manufacturer Part Number: W83977G
• Description: W83877TF plus KBC, CIR, RTC, Pb-free
• Manufacturer: Winbond Electronics Corp America

CR60, CR 61 (Default 0x00, 0x00)
CR70 (Default 0x00)
CR71 (Default 0x02)
CR72 (Default 0x00)
CR73
CRE8 (GP20, Default 0x01)
CRE9 (GP21, Default 0x01)
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
= 1: High; = 0: Low
Bit 0 : IRQTYPE --> IRQ Type
= 1: Level trigger; 0: Edge trigger
Bit 7-4 : Reserved.
Bit 3-0 : These bits select IRQ resource for Watch Dog.
Bit 7-2 : Reserved.
Bit 1 : IRQLEV -- > IRQ Level
= 1: High; = 0: Low
Bit 0 : IRQTYPE --> IRQ Type
= 1: Level trigger; = 0: Edge trigger
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
Bit 7-5 : Reserved
Bit 4-3 : Select Function.
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
= 00 Select basic I/O function
= 01 Reserved
= 10 Select alternate function : Keyboard Reset (connected to KBC P20)
= 11 Reserved
= 1
= 0
= 00 Select Basic I/O function
= 01 Reserved
= 10 Select 2nd alternate function : Keyboard P13 I/O
= 11 Reserved
Enable Common IRQ
Disable Common IRQ
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