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Overview The Lattice SGMII and Gb Ethernet PCS IP core implements the PCS functions of both the Cisco SGMII and the IEEE 802.3z (1000BaseX) specifications. The PCS mode is pin selectable. This IP core may be used in bridging applications and/or PHY implementations.The Serial Gigabit Media Independent Interface (SGMII) is a connection bus for Ethernet Media Access Controllers (MACs) and Physical Layer Devices (PHYs) defined by Cisco Systems. It replaces the classic 22-wire GMII connection with a low pin count, 4-pair, differential SGMII connection. The classic GMII interface defined in the IEEE802.3 specification is strictly for Gigabit rate operation. However, the Cisco SGMII specification defines a method for operating 10 Mbps and 100 Mbps MACs over the interface. Moreover, the Cisco SGMII specification is comprised of more than just a bus interface definition; it defines a bridging function between SGMII and GMII buses. These applications can be completely implemented in LatticeECP3™, LatticeECP2M™ and LatticeSC™ Field Programmable Gate Array (FPGA) devices. As an example, Lattice has developed a reference design for a complete SGMII-to-(G)MII bridge. This reference design is included with the SGMII and Gb Ethernet PCS IP Core package and is described in detail in Appendix C. The core can be instantiated, synthesized and simulated through ispLEVER® IPexpress™. Application Key Features
Resource Utilization
2. The SGMII requires operation at 125 MHz, therefore a higher frequency is not stated. However this core can easily attain frequencies above 140 MHz in a LatticeECP3 speed grade 6 device.
2. The SGMII requires operation at 125 MHz, therefore a higher frequency is not stated. However this core can easily attain frequencies above 140 MHz in a LatticeECP2M speed grade 5 device.
2. The SGMII requires operation at 125 MHz, therefore a higher frequency is not stated. However this core can easily attain frequencies above 200 MHz in a LatticeSC speed grade 5 device. Ordering Information
Evaluate: To download a full evaluation version of this IP, please go to the Lattice IP Server tab in the IPexpress Main Window. All ispLeverCORE IP modules available for download are visible on this tab. Purchase: To find out how to purchase the SGMII and Gb Ethernet PCS IP Core, please contact your local Lattice Sales Office. |
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