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Xilinx ships Gigabit Ethernet IP cores with serial interface

Posted: 18 Apr 2002 ?? ?Print Version ?Bookmark and Share

Keywords:gmac? 10 gmac? gigabit ethernet core? ethernet ip core? virtex ii pro?

Xilinx Inc. has announced the addition of a gigabit serial interface option to its 1Gb (GMAC) and 10Gb (10 GMAC) Ethernet MAC IP cores for the Virtex-II Pro FPGAs, enabling designers of high-end networking and telecom systems that require higher bandwidth to move from parallel to serial interfaces.

Both cores are based on the company's Rocket I/O technology that offers embedded features such as 8B/10B line coding and channel bonding. The IP cores also feature enhanced network management features including support for programmable interframe gaps, EtherStats-based statistics, and maximum-size jumbo frames.

Designed to the Draft 4.1 of the IEEE P802.3ae specification, the 10 GMAC supports the XGMII or the XAUI formats. The core can use a 32-bit parallel XGMII interface running at 312.5Mbps to provide up to 10Gbps total bandwidth.

With the XAUI, the core can support 10GBase-X applications without the need for an external serial PHY device, thereby reducing overall cost and simplifying the design.

Available in GMII and serial PHY interface versions, the GMAC core has an integrated physical coding sub-layer and PMA functions running at 1.25Gbps, and is suited for use in the development of Gigabit communication and storage equipment.

The GMAC core also incorporates an 8-bit parallel GMII interface running at 125MHz to provide up to 1Gbps total bandwidth. Additionally, the core supports single-speed half-duplex and/or full-duplex operation and auto-negotiation, and is fully compliant with the IEEE 802.3-2000 standard specification.

Apart from the Viretx-II series, the GMAC can also be targeted at the Virtex-E and Spartan-IIE FPGAs.

The 10 GMAC core and the 1 GMAC core are available now as LogiCORE products under the terms of the SignOnce IP license. They can be downloaded at

License price for the 10 GMAC and GMAC cores are $22,000 and $16,000, respectively.

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