PARALLEL PORT....................................................................................................................................................72
IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ..................................................................73
EXTENDED CAPABILITIES PARALLEL PORT.................................................................................................78
POWER MANAGEMENT........................................................................................................................................88
SERIAL IRQ..............................................................................................................................................................91
TIMING DIAGRAMS FOR SER_IRQ CYCLE....................................................................................................91
8042 KEYBOARD CONTROLLER DESCRIPTION ...........................................................................................94
LATCHES ON KEYBOARD AND MOUSE IRQS..........................................................................................................100
KEYBOARD AND MOUSE PME GENERATION ..........................................................................................................101
GENERAL PURPOSE I/O.....................................................................................................................................102
GPIO PINS.............................................................................................................................................................102
EITHER EDGE TRIGGERED INTERRUPTS..................................................................................................107
LED FUNCTIONALITY .......................................................................................................................................107
SYSTEM MANAGEMENT INTERRUPT (SMI) ................................................................................................108
PME SUPPORT.......................................................................................................................................................109
‘WAKE ON SPECIFIC KEY’ OPTION...............................................................................................................110
FAN SPEED CONTROL AND MONITORING..................................................................................................111
FAN SPEED CONTROL ...........................................................................................................................................111
FAN TACHOMETER INPUTS ....................................................................................................................................112
SECURITY FEATURE ..........................................................................................................................................115
GPIO DEVICE DISABLE REGISTER CONTROL.......................................................................................................115
DEVICE DISABLE REGISTER ..................................................................................................................................115
GAME PORT LOGIC ............................................................................................................................................115
POWER CONTROL REGISTER ................................................................................................................................117
VREF PIN ..............................................................................................................................................................117
RUNTIME REGISTERS........................................................................................................................................117
CONFIGURATION ................................................................................................................................................142
OPERATIONAL DESCRIPTION.........................................................................................................................159
MAXIMUM GUARANTEED RATINGS*............................................................................................................159
DC ELECTRICAL CHARACTERISTICS..........................................................................................................159
TIMING DIAGRAMS ..............................................................................................................................................162
PACKAGE OUTLINE............................................................................................................................................184
APPENDIX - TEST MODE....................................................................................................................................185
BOARD TEST MODE...............................................................................................................................................185
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