TABLE OF CONTENTS
FEATURES ........................................................................................................................................... 1
GENERAL DESCRIPTION ................................................................................................................. 5
DESCRIPTION OF PIN FUNCTIONS............................................................................................... 7
BUFFER TYPE DESCRIPTIONS............................................................................... 10
GENERAL PURPOSE I/O PINS .......................................................................................................11
REFERENCE DOCUMENTS ............................................................................................................12
FUNCTIONAL DESCRIPTION..........................................................................................................14
SUPER I/O REGISTERS ........................................................................................... 14
HOST PROCESSOR INTERFACE............................................................................ 14
FLOPPY DISK CONTROLLER .........................................................................................................15
FDC INTERNAL REGISTERS...........................................................................................................15
COMMAND SET/DESCRIPTIONS...................................................................................................38
INSTRUCTION SET............................................................................................................................41
DATA TRANSFER COMMANDS............................................................................... 53
CONTROL COMMANDS ........................................................................................... 62
SERIAL PORT (UART).......................................................................................................................69
INFRARED INTERFACE ........................................................................................... 85
PARALLEL PORT ...............................................................................................................................86
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ............................ 88
EXTENDED CAPABILITIES PARALLEL PORT.............................................................................94
OPERATION............................................................................................................ 102
PARALLEL PORT FLOPPY DISK CONTROLLER......................................................................107
POWER MANAGEMENT.................................................................................................................109
UART POWER MANAGEMENT .............................................................................. 113
PARALLEL PORT.................................................................................................... 113
INTERNAL PWRGOOD........................................................................................... 113
32.768 KHZ STANDBY CLOCK OUTPUT................................................................ 114
SERIAL IRQ .......................................................................................................................................115
BIOS BUFFER ...................................................................................................................................120
GENERAL PURPOSE I/O................................................................................................................121
DESCRIPTION......................................................................................................... 121
RUN STATE GPIO DATA REGISTER ACCESS...................................................... 122
GPIO CONFIGURATION......................................................................................... 122
WATCH DOG TIMER .......................................................................................................................126
3
SMSC [ SMSC CORPORATION ]
