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LPC47B27X
(Rev.:2004)

100 Pin Enhanced Super I/O Controller with LPC Interface

SMSC -> Microchip 

TABLE OF CONTENTS

FEATURES..................................................................................................................................................................1

GENERAL DESCRIPTION .......................................................................................................................................7

PIN CONFIGURATION.............................................................................................................................................8

DESCRIPTION OF PIN FUNCTIONS.....................................................................................................................9

BUFFER TYPE DESCRIPTIONS .................................................................................................................................13

PINS THAT REQUIRE EXTERNAL PULLUP RESISTORS ............................................................................................13

BLOCK DIAGRAM...................................................................................................................................................14

REFERENCE DOCUMENTS..................................................................................................................................14

3 VOLT OPERATION / 5 VOLT TOLERANCE ...................................................................................................14

POWER FUNCTIONALITY ...................................................................................................................................15

VCC POWER............................................................................................................................................................15

VTR SUPPORT.........................................................................................................................................................15

INTERNAL PWRGOOD ...........................................................................................................................................15

32.768 KHZ TRICKLE CLOCK INPUT........................................................................................................................15

INDICATION OF 32KHZ CLOCK.................................................................................................................................16

TRICKLE POWER FUNCTIONALITY ...........................................................................................................................16

VREF PIN ................................................................................................................................................................17

MAXIMUM CURRENT VALUES ..................................................................................................................................17

POWER MANAGEMENT EVENTS (PME/SCI)...........................................................................................................18

FUNCTIONAL DESCRIPTION ...............................................................................................................................19

SUPER I/O REGISTERS......................................................................................................................................19

HOST PROCESSOR INTERFACE (LPC) .........................................................................................................19

LPC INTERFACE ..................................................................................................................................................19

FLOPPY DISK CONTROLLER..............................................................................................................................23

FDC INTERNAL REGISTERS.............................................................................................................................23

COMMAND SET/DESCRIPTIONS........................................................................................................................37

INSTRUCTION SET .................................................................................................................................................39

FDC SWAP BIT ........................................................................................................................................................55

SERIAL PORT (UART) ...........................................................................................................................................56

INFRARED INTERFACE........................................................................................................................................69

IR TRANSMIT PINS ...................................................................................................................................................69

MPU-401 MIDI UART..............................................................................................................................................70

OVERVIEW ................................................................................................................................................................70

HOST INTERFACE ......................................................................................................................................................70

MPU-401 COMMAND CONTROLLER .........................................................................................................................73

MIDI UART.............................................................................................................................................................73

MPU-401 CONFIGURATION REGISTERS....................................................................................................................74

SMSC LPC47B27x

-4-

Rev. 08-10-04

DATASHEET

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