WATCH DOG TIMER...........................................................................................................................140
SYSTEM MANAGEMENT INTERRUPT (SMI).....................................................................................141
SMI Registers....................................................................................................................................142
ACPI Support Register for SMI Generation.......................................................................................142
PME Support .......................................................................................................................................143
Wake On Specific Key Option...........................................................................................................144
FAN SPEED CONTROL AND MONITORING......................................................................................145
Fan Speed Control............................................................................................................................145
Fan Tachometer Input.......................................................................................................................147
SECURITY FEATURE..........................................................................................................................151
GPIO Device Disable Register Control..............................................................................................151
Device Disable Register....................................................................................................................151
SMBus CONTROLLER........................................................................................................................151
Overview...........................................................................................................................................151
Configuration Registers.....................................................................................................................152
Runtime Registers.............................................................................................................................152
Pin Multiplexing.................................................................................................................................159
SMBus Timeouts...............................................................................................................................159
X-BUS INTERFACE.............................................................................................................................160
X-Bus Chip Select Base I/O Address Registers................................................................................163
X-Bus Configuration Register............................................................................................................163
RUNTIME REGISTERS........................................................................................................................164
Runtime Registers Block Summary...................................................................................................164
Runtime Registers Block Description................................................................................................168
CONFIGURATION ...............................................................................................................................199
OPERATIONAL DESCRIPTION ..........................................................................................................228
Maximum Guaranteed Ratings..........................................................................................................228
DC Electrical Characteristics.............................................................................................................228
TIMING DIAGRAMS.............................................................................................................................232
ECP Parallel Port Timing...................................................................................................................243
X-Bus Timing.....................................................................................................................................252
PACKAGE OUTLINE...........................................................................................................................260
APPENDIX - TEST MODES.................................................................................................................261
Board Test Mode...............................................................................................................................261
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