Intel 21555 manuales

Intel 21555 Manual de usuario (198 paginas)

Marca: Intel | Categoria: No | Tamaño: 1.81 MB |

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21555 Non-Transparent PCI-to

1

PCI Bridge

1

Contents

3

Preface 1

11

1.1 Cautions and Notes

12

1.2 Data Units

12

1.3 Numbering

12

1.4 Signal Nomenclature

13

1.5 Register Abbreviations

14

Introduction 2

15

Intelligent Subsystem

16

-time resources

17

2.2 Architectural Overview

18

Introduction

19

2.3 Special Applications

20

2.4 Programming Notes

20

2.4.2 Transaction Forwarding

21

2.4.3 ROM Access

21

Signal Descriptions 3

23

Signal Descriptions

24

-Bit Extension Signals

26

Table 1

28

Signals

30

3.5 Miscellaneous Signals

31

Address Decoding 4

33

4.1 CSR Address Decoding

34

Setup Register

35

Base Address Register

35

Base Address

36

Address Map

36

Base Offset

36

A7463-01

37

A7464-01

37

A7465-01

39

Base + Offset

40

Translated

40

A7467-01

41

4.5 Configuration Accesses

44

4.6 21555 Bar Summary

47

PCI Bus Transactions 5

49

5.2 Posted Write Transactions

50

5.2.4.2 Fast Back-to-Back

52

5.2.4.3 Write-Through

53

5.4 Delayed Read Transactions

55

5.4.1 Nonprefetchable Reads

56

5.4.2 Prefetchable Reads

57

-prefetchable

58

-Through Mode

58

5.6 Target Terminations

60

5.7 Ordering Rules

61

Initialization Requirements 6

65

6.2 Reset Behavior

66

6.3 21555 Initialization

68

6.3.2 Without Serial Preload

69

6.4 Power Management Support

70

6.4.2 PME# Support

71

-Swap Functionality

72

-Swap Connections

73

-Swap Insertion and Removal

75

Clocking 7

77

A7497-01

78

7.3 66 MHz Support

79

Parallel ROM Interface 8

81

Parallel ROM Interface

82

8.3 PROM Read by CSR Access

84

A7456-01

85

8.4 PROM Write by CSR Access

86

8.5 PROM Dword Read

87

A7472-01

88

Serial ROM Interface 9

91

A7478-01

94

Serial ROM Interface

95

Arbitration 10

97

A7492-01

99

11.2 Interrupt Support

101

11.3 Doorbell Interrupts

103

11.4 Scratchpad Registers

103

Error Handling 12

105

Error Handling

106

12.2 Parity Errors

107

JTAG Test Port 13

111

13.2.1 Initialization

112

I2O Support 14

113

14.2 Outbound Message Passing

115

14.3 Notes

116

VPD Support 15

119

15.2 Writing VPD Information

120

List of Registers 16

121

16.2 Configuration Registers

122

List of Registers

123

16.4 Address Decoding

130

(Sheet 1 of 2)

131

(Sheet 2 of 2)

131

(Sheet 2 of 2)

132

-only bit and always

133

-bit memory

134

-bit addressing and

134

Bit Name R/W Description

140

-Response

143

Table 53. I/O CSR

146

16.5 PCI Registers

147

Table 59. Vendor ID Register

148

Table 60. Device ID Register

148

-Class Code (SCC)

152

Table 68. BiST Register

153

-MHz bus

157

-robin arbitration scheme to

157

16.6 I2O Registers

165

Table 85. I2O Inbound Queue

166

Table 86. I2O Outbound Queue

166

16.7 Interrupt Registers

170

16.8 Scratchpad Registers

174

16.9 PROM Registers

175

Table 109. ROM Setup Register

177

Table 110. ROM Data Register

177

16.10 SROM Registers

179

-Class Code

181

16.11 Arbiter Control

183

16.12 Error Registers

183

-out condition

184

16.13 Init Registers

185

-Swap registers

189

JTAG Registers

190

16.15 VPD Registers

192

-byte operations

193

Acronyms A

195

VGA – Video Graphics Adapter

196

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