Xilinx LogiCORE 1000BASE-X - : the Ten-Bit Interface

www.xilinx.com Ethernet 1000BASE-X PCS/PMA or SGMII v9.1
UG155 March 24, 2008
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Chapter 6: The Ten-Bit Interface
Figure 6-1: Ten-Bit Interface Transmitter Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 70
Figure 6-2: Ten-Bit-Interface Receiver Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Figure 6-3: TBI Receiver Logic for Spartan-3, Spartan-3E, and Spartan-3A Devices. . . . . . . . . . . . . 72
Figure 6-4: Ten-Bit Interface Receiver Logic - Virtex-4 Device (Example Design) . . . . . . . . . . . . . . 73
Figure 6-5: Alternate Ten-Bit Interface Receiver Logic for Virtex-4 Devices . . . . . . . . . . . . . . . . . . . 74
Figure 6-6: Ten-Bit Interface Receiver Logic - Virtex-5 Device (Example Design) . . . . . . . . . . . . . . 75
Figure 6-7: Alternate Ten-Bit Interface Receiver Logic - Virtex-5 Devices . . . . . . . . . . . . . . . . . . . . . 76
Figure 6-8: Clock Management, Multiple Core Instances with Ten-Bit Interface . . . . . . . . . . . . . . . 77
Chapter 7: 1000BASE-X with RocketIO Transceivers
Figure 7-1: 1000BASE-X Connection to a Virtex-II Pro MGT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 80
Figure 7-2: 1000BASE-X Connection to Virtex-4 MGT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 82
Figure 7-3: 1000BASE-X Connection to Virtex-5 GTP Transceivers . . . . . . . . . . . . . . . . . . . . . . . . . . . 84
Figure 7-4: 1000BASE-X Connection to Virtex-5 GTX Transceivers . . . . . . . . . . . . . . . . . . . . . . . . . . . 86
Figure 7-5: Clock Management: Two Core Instances, Virtex-II Pro
MGTs for 1000BASE-X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 87
Figure 7-6: Clock Management - Multiple Core Instances, MGTs for 1000BASE-X . . . . . . . . . . . . . 89
Figure 7-7: Clock Management - Multiple Core Instances, Virtex-5 RocketIO GTP
Transceivers for 1000BASE-X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 91
Figure 7-8: Clock Management - Multiple Core Instances, Virtex-5 RocketIO GTX
Transceivers for 1000BASE-X . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 93
Chapter 8: SGMII / Dynamic Standards Switching with RocketIO
Transceivers
Figure 8-1: SGMII Implementation using Separate Clock Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . 96
Figure 8-2: SGMII Implementation using Shared Clock Sources. . . . . . . . . . . . . . . . . . . . . . . . . . . . . 97
Figure 8-3: SGMII Connection to a Virtex-II Pro RocketIO Transceiver. . . . . . . . . . . . . . . . . . . . . . 100
Figure 8-4: SGMII Connection to a Virtex-4 MGT. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 102
Figure 8-5: SGMII Connection to a Virtex-5 RocketIO GTP Transceiver . . . . . . . . . . . . . . . . . . . . . 104
Figure 8-6: SGMII Connection to a Virtex-5 RocketIO GTX Transceiver . . . . . . . . . . . . . . . . . . . . . 106
Figure 8-7: Clock Management with Multiple Core Instances with Virtex-II Pro
RocketIO Transceivers for SGMII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 108
Figure 8-8: Clock Management with Multiple Core Instances with Virtex-4 MGTs for SGMII . 110
Figure 8-9: Clock Management with Multiple Core Instances with Virtex-5 GTP
RocketIO Transceivers for SGMII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 112
Figure 8-10: Clock Management with Multiple Core Instances with Virtex-5 GTX
RocketIO Transceivers for SGMII . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 114
Chapter 9: Configuration and Status
Figure 9-1: A Typical MDIO-managed System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 116
Figure 9-2: MDIO Write Transaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure 9-3: MDIO Read Transaction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 117
Figure 9-4: Creating an External MDIO Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 119
Figure 9-5: Dynamic Switching (Register 17) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 151
Chapter 10: Auto-Negotiation
Figure 10-1: 1000BASE-X Auto-Negotiation Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 153
Figure 10-2: SGMII Auto-Negotiation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 155