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
K
H
Z
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 ]
