W83977F Datasheet, PDF (8/181 Pages) Winbond – PLUG & PLAY 1.0A COMPLIANT

W83977F/ W83977AF
PRELIMINARY
6.1 REGISTER ADDRESS MAP ....................................................................................................................93
6.2 UPDATE CYCLE .....................................................................................................................................95
6.3 REGISTERS .............................................................................................................................................96
6.3.1 Register 0Ah.......................................................................................................................................96
6.3.2 Register 0Bh (Read/Write) ..................................................................................................................98
6.3.3 Register 0Ch (Read only)....................................................................................................................99
6.3.4 Register D (Read only) .......................................................................................................................99
6.4 "ON-NOW" CONTROL..........................................................................................................................100
6.5 POWER-ON EVENTS............................................................................................................................100
6.6 POWER-OFF EVENTS ..........................................................................................................................100
6.7 REGISTERS ...........................................................................................................................................101
6.7.1 "ON-Now" Register 1 (Bank2 Register 49h).....................................................................................101
6.7.2 "On-Now" Register 2 (Bank2 Register 4Ah) ....................................................................................102
6.7.3 "On-Now" Register 3 (Bank2 Register 4Bh) ......................................................................................103
6.7.4 "On-Now" Register 4 (Bank2 Register 4Ch)......................................................................................104
7. KEYBOARD CONTROLLER ....................................................................................105
7.1 OUTPUT BUFFER..................................................................................................................................106
7.2 INPUT BUFFER .....................................................................................................................................106
7.3 STATUS REGISTER ..............................................................................................................................106
7.4 COMMANDS .........................................................................................................................................107
7.5 HARDWARE GATEA20/KEYBOARD RESET CONTROL LOGIC ......................................................109
7.5.1 KB Control Register (Logic Device 5, CR-F0) ..................................................................................109
7.5.2 Port 92 Control Register (Default Value = 0x24)..............................................................................109
8. GENERAL PURPOSE I/O...........................................................................................110
8.1 BASIC I/O FUNCTIONS ........................................................................................................................111
8.2 ALTERNATE I/O FUNCTIONS.............................................................................................................113
8.2.1 Interrupt Steering .............................................................................................................................113
8.2.2 Watch Dog Timer Output..................................................................................................................113
8.2.3 Power LED.......................................................................................................................................114
8.2.4 General Purpose Address Decoder ...................................................................................................114
8.2.5 General Purpose Write Strobe ..........................................................................................................114
9. PLUG AND PLAY CONFIGURATION .....................................................................114
9.1 COMPLY PNP........................................................................................................................................115
Publication Release Date:March 1998
-V -
Preliminary Revision 0.58