LPC47B272QFP View Datasheet(PDF) - SMSC -> Microchip

Part Name

Description

Manufacturer

LPC47B272QFP

100 Pin Enhanced Super I/O Controller with LPC Interface

SMSC -> Microchip 

PARALLEL PORT....................................................................................................................................................74

IBM XT/AT COMPATIBLE, BI-DIRECTIONAL AND EPP MODES ..................................................................75

EXTENDED CAPABILITIES PARALLEL PORT.................................................................................................79

PARALLEL PORT FLOPPY DISK CONTROLLER...........................................................................................90

FDC SWAP BIT..........................................................................................................................................................90

FLOPPY ON PARALLEL PORT PIN....................................................................................................................92

POWER MANAGEMENT .......................................................................................................................................93

SERIAL IRQ ..............................................................................................................................................................96

TIMING DIAGRAMS FOR SER_IRQ CYCLE ....................................................................................................96

8042 KEYBOARD CONTROLLER DESCRIPTION ...........................................................................................99

LATCHES ON KEYBOARD AND MOUSE IRQS ..........................................................................................................105

KEYBOARD AND MOUSE PME GENERATION ..........................................................................................................106

GENERAL PURPOSE I/O .....................................................................................................................................108

GPIO PINS.............................................................................................................................................................108

EITHER EDGE TRIGGERED INTERRUPTS ..................................................................................................113

LED FUNCTIONALITY .......................................................................................................................................113

WATCH DOG TIMER..........................................................................................................................................113

SYSTEM MANAGEMENT INTERRUPT (SMI) ................................................................................................114

PME SUPPORT.......................................................................................................................................................116

‘WAKE ON SPECIFIC KEY’ OPTION ...............................................................................................................117

FAN SPEED CONTROL AND MONITORING ..................................................................................................119

FAN SPEED CONTROL ...........................................................................................................................................119

FAN TACHOMETER INPUTS ....................................................................................................................................120

SECURITY FEATURE ..........................................................................................................................................123

GPIO DEVICE DISABLE REGISTER CONTROL.......................................................................................................123

DEVICE DISABLE REGISTER ..................................................................................................................................123

GAME PORT LOGIC ............................................................................................................................................123

POWER CONTROL REGISTER ................................................................................................................................125

VREF PIN ..............................................................................................................................................................125

ISA IRQ TO SERIAL IRQ CONVERSION CAPABILITY ...............................................................................126

RUNTIME REGISTERS ........................................................................................................................................127

CONFIGURATION ................................................................................................................................................150

OPERATIONAL DESCRIPTION.........................................................................................................................167

MAXIMUM GUARANTEED RATINGS*............................................................................................................167

DC ELECTRICAL CHARACTERISTICS..........................................................................................................167

TIMING DIAGRAMS ..............................................................................................................................................170

SMSC LPC47B27x

-4-

DATASHEET

Rev. 04-17-07

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