Altera CPRI IP Core manuali

Altera CPRI IP Core Manuale Utente (220 pagine)

Marchio: Altera | Categoria: Strumenti di misura | Dimensione: 3.72 MB |

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User Guide

1

CPRI MegaCore Function

1

Contents

3

Chapter 5. Testing Features

4

ContentsContents v

5

General Description

8

CPRI IP Core Features

10

Device Family Support

11

MegaCore Verification

12

Release Information

14

Installation and Licensing

15

OpenCore Plus Evaluation

16

2. Getting Started

17

Specifying Parameters

18

Simulation Files

19

Simulating the Design

20

Supporting the Transceivers

21

Specifying Constraints

21

3. Parameter Settings

25

Operation Mode Parameter

26

Line Rate Parameter

26

Enable Autorate Negotiation

27

Rx Elastic Buffer Depth

27

Include MAC Block

28

Include HDLC Block

29

Mapping Mode

29

Application Layer Parameters

30

Words” on page 4–42

32

4. Functional Description

33

Architecture Overview

34

CPRI IP Core Clocks

35

Clocking Structure

36

Notes to Table 4–2:

42

Reset Requirements

43

MegaCore

44

Function

44

MAP Interface Mapping Modes

45

Basic AxC Mapping Mode

46

MAP Interface

47

Note to Table 4–5:

49

Note to Table 4–6:

49

Advanced AxC Mapping Modes

50

MAP Receiver Interface

50

Notes to Table 4–7:

51

MAP Receiver in FIFO Mode

52

MAP Transmitter Interface

56

Notes to Table 4–10:

57

MAP Transmitter in FIFO Mode

58

Auxiliary Interface

62

AUX Receiver Module

63

Avalon-ST 32-bit interface

64

AUX Transmitter Module

66

Note to Figure 4–19:

67

MII Transmitter

70

MII Receiver

71

CPU Interface

73

Control Word Order

78

Transmitting Ethernet Traffic

80

Receiving Ethernet Traffic

81

Accessing the HDLC Channel

82

Note to Table 4–15:

83

Features

84

Physical Layer Architecture

84

Receiver

85

High-Speed Transceiver

86

Rx Elastic Buffer

86

Descrambling

87

Frame Synchronization

87

Alarm Indications

88

Reset Control Word

89

Transmitter

90

Scrambling

91

Tx Elastic Buffer

91

External Loopback

93

CPRI IP Core

93

Internal Reverse Loopback

94

Physical Layer Loopback Mode

94

(1) (2) (3)

96

MAP Receiver Signals

99

6–2 Chapter 6: Signals

100

MAP Interface Signals

100

MAP Transmitter Signals

101

6–4 Chapter 6: Signals

102

Auxiliary Interface Signals

103

AUX Receiver Signals

104

AUX Transmitter Signals

105

6–8 Chapter 6: Signals

106

Extended Rx Status Signals

107

CPRI MII Receiver Signals

108

CPRI MII Transmitter Signals

108

CPU Interface Signals

109

CPRI Data Signals

110

Layer 1 Error Signal

111

Autorate Negotiation Signals

111

6–14 Chapter 6: Signals

112

Physical Layer Signals

112

Transceiver Signals

113

6–16 Chapter 6: Signals

114

Note to Table 6–14:

115

6–18 Chapter 6: Signals

116

7. Software Interface

117

Note to Table 7–5:

119

CPRI_HW_RESET

123

register, refer to “Reset

123

Requirements” on page 4–11

123

Note to Table 7–13:

124

Note to Table 7–16:

125

Note to Table 7–17:

126

Note to Table 7–20:

126

Notes to Table 7–21:

127

Notes to Table 7–28:

130

Notes to Table 7–29:

130

Note to Table 7–32:

133

Note to Table 7–33:

133

Note to Table 7–34:

133

Note to Table 7–35:

134

Note to Table 7–36:

134

Notes to Table 7–37:

135

Notes to Table 7–38:

135

Notes to Table 7–39:

136

Notes to Table 7–40:

136

Note to Table 7–45:

137

Ethernet Registers

138

HDLC Registers

143

Note to Figure 8–1:

150

Test Sequence

151

Running the Testbench

153

A. Initialization Sequence

155

Negotiation

157

Notes for Figure B–1:

158

Running Autorate Negotiation

159

Notes to Table C–3:

167

D. Advanced AxC Mapping Modes

173

Fifteen-Bit Width Mode

175

Sixteen-Bit Width Mode

176

Note to Figure D–2:

177

Delay Requirements

179

RE SlaveREC Master

180

Rx Path Delay

181

Most CPRI IP Core Variations

181

Single-Hop Delay Measurement

182

Notes to Table E–1:

183

Notes to Table E–2:

184

Notes to Table E–3:

186

Arria V GT 9.8 Gbps

188

Notes to Table E–4:

189

Tx Path Delay

190

Note to Table E–6:

192

T_txv_TX

194

in Figure E–1 on page E–2

194

Round-Trip Delay

196

Round-Trip Cable Delay

196

Families

202

Round-Trip Delay Calculation

205

Multi-Hop Delay Measurement

206

Additional Information

213

Document Revision History

214

How to Contact Altera

218

Typographic Conventions

218

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