TABLE OF CONTENTS
FEATURES ........................................................................................................................................1
GENERAL DESCRIPTION .................................................................................................................2
PIN CONFIGURATION.......................................................................................................................5
DESCRIPTION OF PIN FUNCTIONS .................................................................................................6
DESCRIPTION OF MULTIFUNCTION PINS.......................................................................................9
FUNCTIONAL DESCRIPTION..........................................................................................................11
SUPER I/O REGISTERS ..................................................................................................................11
HOST PROCESSOR INTERFACE....................................................................................................11
FLOPPY DISK CONTROLLER.........................................................................................................12
FDC INTERNAL REGISTERS...........................................................................................................12
COMMAND SET/DESCRIPTIONS....................................................................................................36
INSTRUCTION SET .........................................................................................................................40
SERIAL PORT (UART).....................................................................................................................66
INFRARED INTERFACE ..................................................................................................................80
PARALLEL PORT............................................................................................................................81
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ....................................................83
EXTENDED CAPABILITIES PARALLEL PORT .................................................................................89
AUTO POWER MANAGEMENT.....................................................................................................103
SERIAL IRQ...................................................................................................................................108
8042 KEYBOARD CONTROLLER DESCRIPTION .........................................................................113
CONFIGURATION .........................................................................................................................122
OPERATIONAL DESCRIPTION .....................................................................................................146
3
SMSC [ SMSC CORPORATION ]
