Xilinx 1000BASE-X SGMII/Dynamic Standard Switching Elastic Buffer Options, Physical Interface

GUI Interface

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Physical Interface

Depending on the target architecture, two physical interface options are available for the core.

•RocketIO. Uses a RocketIO transceiver specific to the selected device family to extend the 1000BASE-X functionality to include both PCS and PMA sub-layers. For this reason, it is available only for Virtex-II Pro, Virtex-4 FX, Virtex-5 LXT, Virtex-5 SXT, and Virtex-5 FXT devices. For additional information, see “RocketIO Transceiver Logic” in Chapter 7.

•Ten Bit Interface (TBI). Available in all supported families and provides 1000BASE-X or SGMII functionality with a parallel TBI used to interface to an external SERDES. For more information, see “Ten-Bit-Interface Logic” in Chapter 6. Default setting.

MDIO Management Interface

Select this option to include the MDIO Management Interface to access the PCS

Configuration Registers. See “MDIO Management Interface” in Chapter 9.

If this option is not selected, the core is generated with a replacement configuration vector. See “Optional Configuration Vector” in Chapter 9. The Management Interface is selected by default.

Auto-Negotiation

Select this option to include Auto-Negotiation functionality with the core, available only if the core includes the optional Management Interface. For more information, see Chapter 10, “Auto-Negotiation.”The default is to include Auto-Negotiation.

RocketIO Transceiver CRC Logic

This option is visible in the GUI only when a Virtex-II Pro device family is selected, and then only when the RocketIO Interface is selected with the 1000BASE-X standard.

Select this option to use the built-in CRC functionality of the Virtex-II Pro RocketIO transceiver. See Chapter 5, “Using the Virtex-II Pro RocketIO Transceiver CRC Functionality.” This option is disabled (not displayed) by default.

SGMII/Dynamic Standard Switching Elastic Buffer Options

The SGMII/Dynamic Standard Switching Options screen, used to customize the Ethernet 1000BASE-X PCS/PMA or SGMII core, is only displayed if either SGMII or Both is selected in the Select Standard section of the initial customization screen, and only if RocketIO is selected as the Physical Standard.

Ethernet 1000BASE-X PCS/PMA or SGMII v9.1 www.xilinx.com 41

UG155 March 24, 2008