TABLE OF CONTENTS
FEATURES ........................................................................................................................................1
GENERAL DESCRIPTION .................................................................................................................2
PIN CONFIGURATION.......................................................................................................................5
DESCRIPTION OF PIN FUNCTIONS .................................................................................................6
DESCRIPTION OF MULTIFUNCTION PINS.....................................................................................10
FUNCTIONAL DESCRIPTION..........................................................................................................12
SUPER I/O REGISTERS ..................................................................................................................12
HOST PROCESSOR INTERFACE....................................................................................................12
FLOPPY DISK CONTROLLER.........................................................................................................13
FDC INTERNAL REGISTERS...........................................................................................................13
COMMAND SET/DESCRIPTIONS....................................................................................................37
INSTRUCTION SET .........................................................................................................................41
SERIAL PORT (UART).....................................................................................................................67
INFRARED INTERFACE ..................................................................................................................81
FAST IR ...........................................................................................................................................82
PARALLEL PORT............................................................................................................................84
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ....................................................86
EXTENDED CAPABILITIES PARALLEL PORT .................................................................................93
AUTO POWER MANAGEMENT.....................................................................................................109
SERIAL IRQ...................................................................................................................................114
GP INDEX REGISTERS .................................................................................................................119
WATCH DOG TIMER .....................................................................................................................121
8042 KEYBOARD CONTROLLER DESCRIPTION .........................................................................122
SYSTEM MANAGEMENT INTERRUPT (SMI) ................................................................................131
CONFIGURATION .........................................................................................................................132
3
SMSC [ SMSC CORPORATION ]
