4
Vocabulary..................................................................................................................................101
ECP Implementation Standard....................................................................................................102
Parallel Port Floppy Disk Controller.............................................................................................114
POWER MANAGEMENT ...............................................................................................................116
FDC Power Management ............................................................................................................116
DSR From Powerdown................................................................................................................116
Wake Up From Auto Powerdown.................................................................................................116
Register Behavior........................................................................................................................117
Pin Behavior ...............................................................................................................................117
UART Power Management..........................................................................................................119
Exit Auto Powerdown ..................................................................................................................119
Parallel Port................................................................................................................................119
SERIAL IRQ...................................................................................................................................120
ISA IRQ To Serial IRQ Conversion Capability..............................................................................123
8042 KEYBOARD CONTROLLER DESCRIPTION.........................................................................124
Keyboard Interface......................................................................................................................125
External Keyboard and Mouse Interface.......................................................................................126
Keyboard Power Management.....................................................................................................126
Interrupts ....................................................................................................................................127
Memory Configurations...............................................................................................................127
Register Definitions.....................................................................................................................127
External Clock Signal..................................................................................................................128
Default Reset Conditions.............................................................................................................128
Latches On Keyboard and Mouse IRQs.......................................................................................131
Keyboard and Mouse PME Generation........................................................................................132
GENERAL PURPOSE I/O ..............................................................................................................134
GPIO Pins...................................................................................................................................134
Description..................................................................................................................................136
GPIO Control..............................................................................................................................138
GPIO Operation..........................................................................................................................139
GPIO PME and SMI Functionality................................................................................................140
Either Edge Triggered Interrupts..................................................................................................142
Watch Dog Timer........................................................................................................................143
SYSTEM MANAGEMENT INTERRUPT (SMI)................................................................................144
SMI Registers .............................................................................................................................144
Low Battery Warning SMI Event..................................................................................................145
ACPI Support Register for SMI Generation..................................................................................145
PME SUPPORT .............................................................................................................................146
Low Battery Warning PME Event.................................................................................................147
‘Wake On Specific Key’ Option....................................................................................................148
SECURITY FEATURE....................................................................................................................149
GPIO Device Disable Register Control.........................................................................................149
Device Disable Register ..............................................................................................................149
INTRUDER DETECTION................................................................................................................150
Intrusion Bit.................................................................................................................................150
PME and SMI Generation............................................................................................................150
LED BLINK AND COLOR CONTROL ............................................................................................151
RUNTIME REGISTERS..................................................................................................................152
Runtime Registers Block Summary.............................................................................................152