TABLE OF CONTENTS
FEATURES..................................................................................................................................................................1
ORDERING INFORMATION ....................................................................................................................................2
GENERAL DESCRIPTION .......................................................................................................................................2
PIN CONFIGURATION.............................................................................................................................................5
DESCRIPTION OF PIN FUNCTIONS.....................................................................................................................6
BUFFER TYPE DESCRIPTIONS .................................................................................................................................10
PINS THAT REQUIRE EXTERNAL PULLUP RESISTORS ............................................................................................11
BLOCK DIAGRAM...................................................................................................................................................12
REFERENCE DOCUMENTS..................................................................................................................................12
3 VOLT OPERATION / 5 VOLT TOLERANCE ..................................................................................................13
POWER FUNCTIONALITY ...................................................................................................................................13
VCC POWER............................................................................................................................................................13
VTR SUPPORT.........................................................................................................................................................13
INTERNAL PWRGOOD...........................................................................................................................................13
32.768 KHZ TRICKLE CLOCK INPUT........................................................................................................................13
INDICATION OF 32KHZ CLOCK.................................................................................................................................14
TRICKLE POWER FUNCTIONALITY ...........................................................................................................................14
VREF PIN ................................................................................................................................................................15
MAXIMUM CURRENT VALUES ..................................................................................................................................15
POWER MANAGEMENT EVENTS (PME/SCI)...........................................................................................................16
FUNCTIONAL DESCRIPTION...............................................................................................................................16
SUPER I/O REGISTERS......................................................................................................................................16
HOST PROCESSOR INTERFACE (LPC) .........................................................................................................16
LPC INTERFACE ..................................................................................................................................................17
FLOPPY DISK CONTROLLER .............................................................................................................................21
FDC INTERNAL REGISTERS.............................................................................................................................21
COMMAND SET/DESCRIPTIONS........................................................................................................................36
INSTRUCTION SET.................................................................................................................................................38
SERIAL PORT (UART) ...........................................................................................................................................55
INFRARED INTERFACE........................................................................................................................................66
MPU-401 MIDI UART..............................................................................................................................................67
OVERVIEW................................................................................................................................................................67
HOST INTERFACE......................................................................................................................................................68
MPU-401 COMMAND CONTROLLER.........................................................................................................................70
MIDI UART.............................................................................................................................................................71
MPU-401 CONFIGURATION REGISTERS....................................................................................................................71
Page 3
SMSC [ SMSC CORPORATION ]
