VT8235 datasheet(4/145 Pages) VIA

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VT8235 V-Link South Bridge

Revision 1.22 October 24, 2002

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Table Of Contents

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TABLE OF CONTENTS

REVISION HISTORY....................................................................................................................................................................... I

TABLE OF CONTENTS .................................................................................................................................................................. II

LIST OF FIGURES .........................................................................................................................................................................IV

LIST OF TABLES ...........................................................................................................................................................................IV

PRODUCT FEATURES .................................................................................................................................................................... 1

OVERVIEW ....................................................................................................................................................................................... 4

PINOUTS ............................................................................................................................................................................................ 6

PIN DESCRIPTIONS ........................................................................................................................................................................ 9

REGISTERS ..................................................................................................................................................................................... 21

REGISTER OVERVIEW.................................................................................................................................................................. 21

REGISTER DESCRIPTIONS............................................................................................................................................................ 36

Legacy I/O Ports ................................................................................................................................................................... 36

Keyboard Controller I/O Registers........................................................................................................................................................ 37

DMA Controller I/O Registers .............................................................................................................................................................. 39

Interrupt Controller I/O Registers ......................................................................................................................................................... 40

Timer / Counter Registers ..................................................................................................................................................................... 40

CMOS / RTC I/O Registers................................................................................................................................................................... 41

Keyboard / Mouse Wakeup Index / Data Registers ........................................................................................................... 42

Keyboard / Mouse Wakeup Registers ................................................................................................................................. 42

Memory Mapped I/O APIC Registers ................................................................................................................................ 43

Indexed I/O APIC Registers ................................................................................................................................................ 43

Configuration Space I/O....................................................................................................................................................... 45

Device 16 Function 0 Registers - USB 1.1 UHCI Ports 0-1................................................................................................ 46

PCI Configuration Space Header .......................................................................................................................................................... 46

USB-Specific Configuration Registers.................................................................................................................................................. 47

USB I/O Registers................................................................................................................................................................................. 49

Device 16 Function 1 Registers - USB 1.1 UHCI Ports 2-3................................................................................................ 50

PCI Configuration Space Header .......................................................................................................................................................... 50

USB-Specific Configuration Registers.................................................................................................................................................. 51

USB I/O Registers................................................................................................................................................................................. 53

Device 16 Function 2 Registers - USB 1.1 UHCI Ports 4-5................................................................................................ 54

PCI Configuration Space Header .......................................................................................................................................................... 54

USB-Specific Configuration Registers.................................................................................................................................................. 55

USB I/O Registers................................................................................................................................................................................. 57

Device 16 Function 3 Registers - USB 2.0 EHCI ................................................................................................................ 58

PCI Configuration Space Header .......................................................................................................................................................... 58

USB-Specific Configuration Registers.................................................................................................................................................. 59

EHCI USB 2.0 I/O Registers................................................................................................................................................................. 60

Device 17 Function 0 Registers – Bus Control and Power Management ......................................................................... 61

PCI Configuration Space Header .......................................................................................................................................................... 61

ISA Bus Control.................................................................................................................................................................................... 62

Miscellaneous Control........................................................................................................................................................................... 64

Function Control ................................................................................................................................................................................... 65

Serial IRQ, LPC, and PC/PCI DMA Control ........................................................................................................................................ 66

Plug and Play Control - PCI .................................................................................................................................................................. 66

GPIO and Miscellaneous Control.......................................................................................................................................................... 67

Programmable Chip Select Control....................................................................................................................................................... 69

ISA Decoding Control........................................................................................................................................................................... 70

Power Management-Specific Configuration Registers.......................................................................................................................... 72

System Management Bus-Specific Configuration Registers ................................................................................................................. 79

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