w83977ctf Winbond Electronics Corp America, w83977ctf Datasheet - Page 6

• Manufacturer Part Number: w83977ctf
• Description: Winbond I/o
• Manufacturer: Winbond Electronics Corp America

5.4 EXTENSION FDD MODE (EXTFDD) ........................................................................................ 77
5.5 EXTENSION 2FDD MODE (EXT2FDD) .................................................................................... 77
6.0 KEYBOARD CONTROLLER ..............................................................................78
6.1 OUTPUT BUFFER .................................................................................................................... 78
6.2 INPUT BUFFER........................................................................................................................ 78
6.3 STATUS REGISTER................................................................................................................. 79
6.4 COMMANDS.............................................................................................................................. 80
6.5 HARDWARE GATEA20/KEYBOARD RESET CONTROL LOGIC ............................................ 81
6.6 ONNOW / SECURITY KEYBOARD AND MOUSE WAKE-UP.................................................... 83
7.0 GENERAL PURPOSE I/O...................................................................................84
7.1 BASIC I/O FUNCTIONS............................................................................................................. 86
7.2 ALTERNATE I/O FUNCTIONS................................................................................................... 88
8.0 PLUG AND PLAY CONFIGURATION ................................................................90
5.3.11 Bit Map of ECP Port Registers ........................................................................................... 74
5.3.12 ECP Pin Descriptions....................................................................................................... 75
5.3.13 ECP Operation................................................................................................................. 76
5.3.14 FIFO Operation................................................................................................................. 76
5.3.15 DMA Transfers................................................................................................................. 77
5.3.16 Programmed I/O (NON-DMA) Mode.................................................................................. 77
6.5.1 KB Control Register (Logic Device 5, CR-F0)....................................................................... 82
6.5.2 Port 92 Control Register (Default Value = 0x24)................................................................... 82
6.6.1 Keyboard Wake-Up Function ............................................................................................... 83
6.6.2 Keyboard Password Wake-Up Function .............................................................................. 83
6.6.3 Mouse Wake-Up Function.................................................................................................... 83
7.2.1 Interrupt Steering ................................................................................................................. 88
7.2.2 Watch Dog Timer Output ..................................................................................................... 89
7.2.3 Power LED .......................................................................................................................... 89
7.2.4 General Purpose Address Decoder...................................................................................... 89
-IV -
Publication Release Date: March 1999
W83977EF/ CTF
PRELIMINARY
Revision A1