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LPC47M112-MW

Enhanced Super I/O Controller with LPC Interface / Dual Game Port Interface

SMSC -> Microchip 

Enhanced Super I/O Controller with LPC Interface

Datasheet

Table of Contents

1 General Description..............................................................................................................................................7

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

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

3.1 Buffer Type Descriptions................................................................................................................................13

3.2 Pins That Require External Pullup Resistors................................................................................................13

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

5 REFERENCE DOCUMENTS................................................................................................................................15

6 3 VOLT OPERATION / 5 VOLT TOLERANCE ....................................................................................................16

7 POWER FUNCTIONALITY...................................................................................................................................17

7.1 VCC Power .......................................................................................................................................................17

7.2 VTR Support ....................................................................................................................................................17

7.3 Internal PWRGOOD .........................................................................................................................................17

7.4 32.768 kHz Trickle Clock Input .......................................................................................................................17

7.5 Indication of 32kHz Clock ...............................................................................................................................17

7.6 Trickle Power Functionality............................................................................................................................18

7.7 VREF Pin ..........................................................................................................................................................19

7.8 Maximum Current Values ...............................................................................................................................19

7.9 Power Management Events (PME/SCI) ..........................................................................................................19

8 FUNCTIONAL DESCRIPTION .............................................................................................................................20

8.1 Super I/O Registers .........................................................................................................................................20

8.2 Host Processor Interface (LPC) .....................................................................................................................20

8.3 LPC INTERFACE..............................................................................................................................................20

8.3.1 LPC Interface Signal Definition.........................................................................................................................................20

8.3.2 LPC Cycles .......................................................................................................................................................................21

8.3.3 Field Definitions ................................................................................................................................................................21

8.4 Power Management.........................................................................................................................................22

8.4.1 CLOCKRUN Protocol .......................................................................................................................................................22

8.4.2 Typical Usage ...................................................................................................................................................................22

8.4.3 SYNC Timeout..................................................................................................................................................................22

8.4.4 SYNC Patterns and Maximum Number of SYNCS...........................................................................................................22

8.4.5 SYNC Error Indication ......................................................................................................................................................22

8.5 LPC Transfer Sequence Examples ................................................................................................................24

8.5.1 Wait State Requirements..................................................................................................................................................24

9 FLOPPY DISK CONTROLLER ............................................................................................................................25

9.1 FDC Internal Registers....................................................................................................................................25

10 COMMAND SET/DESCRIPTIONS ...................................................................................................................41

11 INSTRUCTION SET ..........................................................................................................................................44

12 SERIAL PORT (UART) .....................................................................................................................................62

13 Serial Data........................................................................................................................................................66

14 INFRARED INTERFACE ..................................................................................................................................75

15 MPU-401 MIDI UART........................................................................................................................................76

15.1 Overview.......................................................................................................................................................76

15.2 Host Interface...............................................................................................................................................76

ADDRESS.........................................................................................................................................................................................77

16 Status Port .......................................................................................................................................................78

17 Bits[5:0] ............................................................................................................................................................79

SMSC DS – LPC47M112

Page 4

DATASHEET

Rev. 02-16-07

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