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124 www.xilinx.com Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
UG155 March 24, 2008
Chapter 9: Configuration and Status
R
Register 4: Auto-Negotiation Advertisement
Table 9-5: PHY Identifier (Registers 2 and 3)
Bit(s) Name Description Attributes Default Value
2.15:0 Organizationally Unique
Identifier
Always return 0s returns 0s 0000000000000000
3.15:10 Organizationally Unique
Identifier
Always return 0s returns 0s 000000
3.9:4 Manufacturer’s model
number
Always return 0s returns 0s 000000
3.3:0 Revision Number Always return 0s returns 0s 0000
MDIO Register 4: Auto-Negotiation Advertisement
Table 9-6: Auto-Negotiation Advertisement Register (Register 4)
Bit(s) Name Description Attributes
Default
Value
4.15 Next Page 1 = Next Page functionality is advertised
0 = Next Page functionality is not
advertised
read/write 0
4.14 Reserved Always returns ‘0,’ writes ignored returns 0 0
4.13:12 Remote
Fault
00 = No Error
01 = Offline
10 = Link Failure
11 = Auto-Negotiation Error
read/write
self clearing to 00
after auto-
negotiation
00
4.11:9 Reserved Always return 0s, writes ignored returns 0 0
4.8:7 Pause 00 = No PAUSE
01 = Symmetric PAUSE
10 = Asymmetric PAUSE towards link
partner
11 = Both Symmetric PAUSE and
Asymmetric PAUSE towards link partner
read/write 11
NEXT PAGE
RESERVED
RESERVED
REMOTE FAULT
HALF DUPLEX
15 14 13 12 11 7 6 5 0
Reg 4
RESERVED
9
8
PAUSE
4
FULL DUPLEX
- LogiCORE™ IP 1
- Ethernet 1000BASE-X 1
- PCS/PMA or SGMII v9.1 1
- Revision History 2
- Table of Contents 3
- Chapter 10: Auto-Negotiation 5
- Appendix B: Core Latency 7
- Appendix F: Debugging Guide 7
- Schedule of Figures 9
- Schedule of Tables 13
- About This Guide 15
- Conventions 16
- Online Document 17
- Preface: About This Guide 18
- IP core 19
- Additional Core Resources 20
- Technical Support 20
- Feedback 20
- Document 21
- Chapter 1: Introduction 22
- Core Architecture 23
- GMII Block 24
- PCS Transmit Engine 24
- RocketIO Interface Block 25
- 8B/10B Decoder 26
- Receiver Elastic Buffer 26
- TBI Block 26
- 8B/10B Encoder 26
- Core Interfaces 27
- Chapter 2: Core Architecture 28
- Client Side Interface 31
- Common Signal Pinout 33
- Signal Direction Description 35
- Physical Side Interface 36
- Chapter 3 39
- Select Standard 40
- Core Functionality 40
- Physical Interface 41
- MDIO Management Interface 41
- RocketIO Tile Configuration 43
- Output Generation 44
- Designing with the Core 45
- Design Guidelines 50
- Write an HDL Application 51
- Synthesize your Design 51
- Create a Bitstream 51
- Know the Degree of Difficulty 51
- Keep it Registered 52
- Use Supported Design Flows 52
- Chapter 5 53
- GMII Reception 54
- Frame Reception with Errors 55
- False Carrier 56
- Bit[0]: Link Status 56
- Bit[1]: Link Synchronization 56
- GMII Transmission 57
- Overview 59
- Implementing External GMII 61
- GMII Receiver Logic 66
- The Ten-Bit Interface 69
- Receiver Logic 70
- Ten-Bit-Interface Logic 71
- Method 2 74
- Block Level 77
- 1000BASE-X with RocketIO 79
- (Block Level from 84
- Transceivers for 1000BASE-X 91
- Chapter 8 95
- Analysis 96
- Closely Related Clock Sources 98
- UG155 March 24, 2008 100
- '0' 102
- '1' 102
- Virtex-5 RocketIO GTP Wizard 103
- REFCLKOUT 104
- Virtex-5 RocketIO GTX Wizard 105
- Virtex-II Pro Devices 107
- Virtex-4 FX Devices 109
- Virtex-5 LXT and SXT Devices 111
- Virtex-5 FXT Devices 113
- Configuration and Status 115
- MDIO Transactions 116
- MDIO Addressing 117
- Register Address (REGAD) 118
- Management Registers 119
- Register 0: Control Register 120
- Register 1: Status Register 122
- Register 8: Next Page Receive 127
- Register 15: Extended Status 128
- Register 0: SGMII Control 135
- Register 1: SGMII Status 137
- Optional Configuration Vector 151
- Auto-Negotiation 153
- SGMII Standard 155
- 1000BASE-X Standard 156
- Simulating Auto-Negotiation 156
- SGMII Standards 157
- Operation of the Core 158
- Constraining the Core 161
- Clock Period Constraints 162
- Setting MGT Attributes 162
- Constraints 163
- MGT Placement Constraints 165
- Switching Constraints 168
- Ten-Bit Interface Constraints 168
- TBI Input Setup/Hold Timing 170
- Virtex-4 Devices 171
- GMII IOB Constraints 173
- GMII Input Setup/Hold Timing 174
- Virtex-4 devices 175
- Virtex-5 devices 175
- Virtex-4 or Virtex-5 Devices 176
- = 8 - 6.501 177
- = 1.499 ns 177
- = 7.893 - 8 177
- = -0.107 ns 177
- Interfacing to Other Cores 179
- Switching) Functionality 185
- IOB LOGIC 187
- Special Design Considerations 197
- Loopback 199
- Transceivers 199
- Implementing the Design 201
- Implementation 202
- Static Timing Analysis 203
- Generating a Bitstream 203
- Generating a Simulation Model 203
- Using the Model 203
- Virtex-5 Devices 204
- Interoperability 205
- Transmit Path Latency 207
- Receive Path Latency 207
- Appendix C 209
- 1000BASE-X State Machines 211
- Start of Frame Encoding 212
- Reception of the Even Case 213
- The Odd Transmission Case 213
- Reception of the Odd Case 214
- End of Frame Encoding 215
- Appendix E 219
- 5000 x 18 = 90000 bytes 220
- Virtex-4 FX 221
- 122 - Overflow Mark 222
- 6 - Underflow Mark 222
- Rx Elastic Buffer 223
- Clock Correction 224
- Jumbo Frame Reception 226
- Debugging Guide 227
- RocketIO Transceiver Specific 229
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