W83977G Winbond Electronics Corp America, W83977G Datasheet - Page 6

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

9. REAL-TIME CLOCK (RTC) AND "ON-NOW" CONTROL ............................................................... 96
10. KEYBOARD CONTROLLER ......................................................................................................... 107
11. GENERAL PURPOSE I/O ............................................................................................................. 112
12. PLUG AND PLAY CONFIGURATION ........................................................................................... 117
8.4
8.5
9.1
9.2
9.3
9.4
9.5
9.6
9.7
10.1 Output Buffer ....................................................................................................................... 108
10.2 Input Buffer.......................................................................................................................... 108
10.3 Status Register.................................................................................................................... 108
10.4 Commands.......................................................................................................................... 109
10.5 HARDWARE GATEA20/KEYBOARD RESET CONTROL LOGIC..................................... 110
11.1 Basic I/O functions .............................................................................................................. 113
11.2 Alternate I/O Functions ....................................................................................................... 115
12.1 Comply PnP ........................................................................................................................ 117
12.2 Compatible PnP .................................................................................................................. 118
W83977F-A/ W83977G-A/ W83977AF-A/ W83977AG-A
Extension FDD Mode (EXTFDD) .......................................................................................... 95
Extension 2FDD Mode (EXT2FDD) ...................................................................................... 95
REGISTER ADDRESS MAP................................................................................................. 96
Update Cycle......................................................................................................................... 98
REGISTERS ......................................................................................................................... 99
"On-Now" Control................................................................................................................ 102
Power-On Events ................................................................................................................ 102
Power-Off Events ................................................................................................................ 102
Registers ............................................................................................................................. 103
9.3.1
9.3.2
9.3.3
9.3.4
9.7.1
9.7.2
9.7.3
9.7.4
10.5.1
10.5.2
11.2.1
11.2.2
11.2.3
11.2.4
11.2.5
12.1.1
12.1.2
12.1.3
12.1.4
Register 0Ah...........................................................................................................................99
Register 0Bh (Read/Write) ...................................................................................................100
Register 0Ch (Read only) .....................................................................................................101
Register D (Read only) .........................................................................................................102
On-Now”” Register 1 (Bank2 Register 49h) ..........................................................................103
On-Now_ Register 2 (Bank2 Register 4Ah) ..........................................................................104
"On-Now" Register 3 (Bank2 Register 4Bh) .........................................................................105
"On-Now" Register 4 (Bank2 Register 4Ch) .........................................................................106
KB Control Register (Logic Device 5, CR-F0).......................................................................110
Port 92 Control Register (Default Value = 0x24) ..................................................................111
Interrupt Steering..................................................................................................................115
Watch Dog Timer Output......................................................................................................115
Power LED ...........................................................................................................................116
General Purpose Address Decoder......................................................................................116
General Purpose Write Strobe..............................................................................................116
Wait for Key State.................................................................................................................117
Sleep State...........................................................................................................................118
Isolation State.......................................................................................................................118
Configure State.....................................................................................................................118
-V -
Publication Release Date: May 2006
Revision 0.60