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TABLE OF CONTENTS
FEATURES ......................................................................................................................... 1
GENERAL DESCRIPTION .................................................................................................. 2
PIN CONFIGURATION........................................................................................................ 5
DESCRIPTION OF PIN FUNCTIONS.................................................................................. 6
DESCRIPTION OF MULTIFUNCTION PINS......................................................................10
REFERENCE DOCUMENTS..............................................................................................10
FUNCTIONAL DESCRIPTION............................................................................................12
SUPER I/O REGISTERS................................................................................................12
HOST PROCESSOR INTERFACE.................................................................................12
FLOPPY DISK CONTROLLER ..........................................................................................13
FDC INTERNAL REGISTERS ........................................................................................13
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...............................................................90
PARALLEL PORT FLOPPY DISK CONTROLLER..........................................................104
POWER MANAGEMENT..................................................................................................106
V
TR
SUPPORT..............................................................................................................106
SERIAL IRQ .....................................................................................................................112
GP INDEX REGISTERS...................................................................................................117
WATCH DOG TIMER .......................................................................................................119
8042 KEYBOARD CONTROLLER DESCRIPTION ..........................................................120
SYSTEM MANAGEMENT INTERRUPT (SMI)..................................................................129
PME SUPPORT............................................................................................................129
CONFIGURATION............................................................................................................131
OPERATIONAL DESCRIPTION.......................................................................................160
MAXIMUM GUARANTEED RATINGS*.........................................................................160