TABLE OF CONTENTS
FEATURES ........................................................................................................................................... 1
GENERAL DESCRIPTION................................................................................................................. 6
DESCRIPTION OF PIN FUNCTIONS............................................................................................... 7
BUFFER TYPE DESCRIPTIONS.................................................................................................... 11
REFERENCE DOCUMENTS ........................................................................................................... 13
FUNCTIONAL DESCRIPTION......................................................................................................... 14
SUPER I/O REGISTERS............................................................................................................... 14
HOST PROCESSOR INTERFACE.............................................................................................. 14
FLOPPY DISK CONTROLLER....................................................................................................... 16
FDC INTERNAL REGISTERS ................................................................................................. 16
COMMAND SET/DESCRIPTIONS.......................................................................................... 41
Force Write Protect.................................................................................................................. 70
SERIAL PORT (UART)..................................................................................................................... 70
REGISTER DESCRIPTION...................................................................................................... 70
INFRARED INTERFACE .................................................................................................................. 88
PARALLEL PORT ............................................................................................................................. 88
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES........................................ 90
EXTENDED CAPABILITIES PARALLEL PORT.......................................................................... 96
PARALLEL PORT FLOPPY DISK CONTROLLER.................................................................. 108
POWER MANAGEMENT................................................................................................................ 110
FDC Power Management...................................................................................................... 110
UART Power Management ................................................................................................... 115
Parallel Port.............................................................................................................................. 115
VBAT Support ............................................................................................................................ 115
VTR Support .............................................................................................................................. 115
Internal PWRGOOD................................................................................................................ 116
CIRCC PLL Power Control ................................................................................................... 116
32.768 kHz Standby Clock Output...................................................................................... 116
BIOS BUFFER.................................................................................................................................. 121
GENERAL PURPOSE I/O .............................................................................................................. 123
3
SMSC [ SMSC CORPORATION ]
