Q1. What are the key features of the CORE Generator Virtex-6 FPGA Embedded Tri-mode Ethernet Media Access Controller (MAC) Wrapper? A1. The wrappers provide user configurable interface to Virtex-6 FPGA Tri-mode Ethernet MAC (TEMAC) that supports MII, GMII, RGMII v1.3, RGMII v2.0, SGMII, and 1000BASE-X PCS/PMA physical interfaces. For more information, see the product page and linked documentation:
http://www.xilinx.com/products/ipcenter/V6_Embedded_TEMAC_Wrapper.htmQ2. What other Ethernet IP cores are available?A2. See www.xilinx.com/ethernet for a list of IP Ethernet cores.
Q3. What are the differences between hardened Tri-mode Ethernet MAC and soft cores?A3. Refer to the Differences between the Embedded Tri-Mode Ethernet MAC and Soft IP Cores Appendix in the Virtex-6 FPGA Embedded Tri-Mode Ethernet MAC UG368:
http://www.xilinx.com/support/documentation/user_guides/ug368.pdfQ4. Can the TEMAC be adjusted to transmit an IFG less than the IEEE 802.3 specification?A4. No, CLIENTEMACTXIFGDELAY can only be used to increase the IFG from the minimum transmitted IFG of 12bytes in full duplex mode. For more information on adjusting the IFG, see the Client Interface -> Transmit (TX) Client -> IFG Adjustment in the Virtex-6 FPGA Embedded Tri-Mode Ethernet MAC UG368:
http://www.xilinx.com/support/documentation/user_guides/ug368.pdfQ5. What is the min IFG that can be received by the TEMAC?A5. The TEMAC is tested to the minimum received IFG specified by the IEEE 802.3 specification.
Q6. What can cause RXBADFRAME to be asserted?A6. The RX Statistics can be checked to see the source of the bad frame. A complete list of possible causes of a bad frame is available in the RX Client Interface section of the Virtex-6 FPGA Embedded Tri-Mode Ethernet MAC UG368:
http://www.xilinx.com/support/documentation/user_guides/ug368.pdfQ7. Is half-duplex supported for SGMII/1000BASE-X?A7. No, SGMII, 1000BASE-X and 1Gbps operation in the TEMAC is only supported in Full duplex mode.
Q8. What HW testing has been done for this core?A8. The CORE Generator Virtex-6 FPGA Embedded Tri-mode Ethernet Media Access Controller (MAC) Wrapper has been taken to the University of New Hampshire (UNH) for testing.
Q9. What PHYs will be compatible with this core/ which have been tested in hardware?A9. UNH testing was done with the ML605 board which has a Marvel 88EE1111 PHY on it, but the TEMAC will be compatible with other PHYs designed the IEEE 802.3 specification. Media Independent Interface (MII) and Gigabit Media Independent Interface (GMII) Interface must operate at 2.5V.
Q10. Can I dynamically switch between SGMII and 1000BASE-X?A10. Yes, for more details on dynamically switching between SGMII and 1000BASE-X, see the Switching Between SGMII and 1000BASE-X Standards section in the Virtex-6 FPGA Embedded Tri-Mode Ethernet MAC UG368:
http://www.xilinx.com/support/documentation/user_guides/ug368.pdfQ11. Why am I seeing problems with data reception or transmission?A11. To get started debugging possible RX/TX data issues or link up issues, see the debugging appendix in the Getting Started Guide:
http://www.xilinx.com/support/documentation/ipcommunicationnetwork_ethernet_v6embeddedtemacwrapper.htm