The ksz9031mnx offers the industrystandard gmii mii gigabit media independent interface media independent interface for connection to gmii mii macs in gigabit ethernet processors and switches for data transfer at mbps or 10100mbps. It differs from gmii by its lowpower and low pin count serial interface commonly referred to as a serdes. An alternate board can be the inrevium fmclglan card. Independent interface rgmii core provides the rgmii between rgmiicompliant. This patch adds support for the gmii to rgmii converter ip in the pl. The xilinx ethernet quad serial gigabit media independent interface pcspma or qsgmii ip logicore ip provides an ethernet physical coding sublayer pcs with an aggregation of four 10100m ports to one five gigabit transceiver. The lvds ios in the intel stratix 10, intel arria 10, stratix v, stratix iv, stratix iii, arria v, arria ii gx fast speed grade, intel cyclone 10 gx and lp fpgas allow you to easily implement the serial gigabit media independent interface sgmii for 10100 mb or gigabit ethernet. Sep, 2016 xilinx gmiitorgmii converter driver device tree bindingsthe gigabit media independent interface gmii to reduced gigabit media. Page 18 reduced gigabit media independent interface sgmii serial gigabit media independent interface vhdl vhsic hardware description language vhsic an acronym for very highspeed integrated circuits. Gigabit media independent interface gmii is an interface between the media access control mac device and the physical layer. Gmii to rgmii ip can be used to provide an rgmii interface using the pl. Ethernet physical media devices phy and the gigabit ethernet controller. Download the xilinx documentation navigator from the downloads. Xilinx gmiitorgmii converter driver device tree bindingsthe gigabit media independent interface gmii to reduced gigabit media.
The methods in this document describe how to set up an rgmii specific timing budget and determine. Ksz9896c 6port gigabit ethernet switch with gmiirgmii. This core can be used in all three modes of operation 10100. As shown in figure3, the gmii interface connects the phy and ps gem through the emio pins.
Download the xilinx documentation navigator from the design tools tab on. This is done by setting the parameters in the gemac features tab in the plb gemac core. Download and install vivado board support package files for mimas a7 from here. The dp83867 device is a robust, low power, fully featured physical layer transceiver with integrated pmd sublayers to support 10basete, 100basetx and baset ethernet protocols.
The gmii to rgmii ip can be used to provide an rgmii interface. The reduced gigabit media independent interface rgmii module provides an rgmii interface to an existing ethernet mac design with a gmii or tbi interface, for example the gigabit ethernet mac gem available from cadence design foundry. Rgmii interface timing budgets robertrodrigues abstract rgmii interface timing budgets is intended to serve as a guideline for developing a timing budget when using the rgmii v1. The interface operates at speeds up to mbits, implemented using a data interface clocked at 125 mhz with separate eightbit data paths for receive and transmit, and is. Download the xilinx documentation navigator from the design tools. The serdes interface requires a special clocking structure, shown in figure 4, is set up with a.
This trimode fullduplex ethernet mac sublayer was developed in vhdl as an alternative to both commercial and free implementations for usage on fpgas. Depending on the target xilinx fpga architecture, it may be possible to select from two different physical interface choices for. Qsgmii interfaces are implemented using transceivers in virtex7 or kintex7 devices. Basic mediaindependent interface management miim interface support that. The parameter enable serdes is set to 1and the parameters enable gmii interface and enable tbi interface are turned off by setting them to 0. Ps and plbased 1g10g ethernet solution application note. The xilinx ml505 and ml507 development boards are the target boards in this example. Mediaindependent interface mii for 10100 mbs and gigabit mediaindependent interface gmii connectivity. The principle objective of rgmii is to reduce the number of pins from 22 down to 12 in. Xilinx xapp692 using the rgmii to interface with the gigabit. If you are using the ethernet fmc, the phy is the marvell 88e1510, and the ethernet mac is inside the fpga. The core gmii interface is connected to an embedded ethernet mac, for example, the.
This design demonstrates how you can route the hps emac into the fpga in order to use fpga io for the interface. Although the hps emac supports rgmii, you can route the emac to the fpga in order to reuse the hps io for other peripherals. Max24287 1gbps paralleltoserial mii converter general description the max24287 is a flexible, lowcost ethernet interface conversion ic. The basexsgmii phy and the gth transceiver are a part of the axi ethernet core for 1g pl ethernet. Figure top xref 2 gmii rgmii xilinx fpga gigabit ethernet mac core, connected to the external phy device using gmii, rgmii and sgmii in conjunction with the ethernet base, core phy interface with gmii with rgmii management interface virtex5 supported, provide an external rgmii designed to ieee 802. When the emac is routed into the fpga it is exposed as a mii gmii interface so this design also adapts the exposed interface to rgmii before it is. Marvell phy with an rgmii interface you will need to connect ethernet 0 via the emioprogrammable logic section via miigmii interface to an external phy that you provide. The principle objective of rgmii is to reduce the number of pins from 22 down to 12 in a costeffective and technologyindependent manner. Collection of ethernetrelated components for gigabit, 10g, and 25g packet processing 8 bit and 64 bit datapaths.
Download the reference design files for this application note from the xilinx. This is similar to what has been seen for ultrascale devices in previous releases. The gigabit mediaindependent interface gmii is an interface between the medium access control mac device and the physical layer. This is where the xilinx ip core comes in handy, you can just select the interface gmii,rgmii,sgmii. The 101001g ethernet verification ip is compliant with ieee 802. The serial gigabit media independent interface sgmii is a sequel of mii, a standard interface used to connect an ethernet macblock to a phy. This core can be used in all three modes of operation10.
Special clock frequency requirement for gmii rgmiisgmii interface. These devices have builtin serializerdeserializer serdes circuitry that supports highspeed. Includes modules for handling ethernet frames as well as ip, udp, and arp and the components for constructing a complete udpip stack. Constraints when implementing an external rgmii, rgmii iob constraints, rgmii input setuphold timing, rgmii ddr constraints, spartan3, spartan3e, spartan3a, and virtex4 devices, virtex5 devices, 8 6. 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. The example design routes the emio gmii interface to fpga ios to be used by an fmc card with an ethernet phy.
Serial gigabit media independent interface sgmii only mbitss speed is supported using this interface. Its main distinction is the focus on simplicity both in the external user interface and internal operation. This patch reads the mdio node and on finding the presence of this converter takes appropriate action. Reduced gigabit media independent interface rgmii technical. Ksz9896c ds00002390bpage 2 2017 2018 microchip technology inc. Xilinx recommends using this scheme to forward clocks from the fpga logic to the output pins. Sgmii xref target figure 2 xilinx fpga ethernet basex pcspma or sgmii, logicore ip ethernet basex pcspma or sgmii v11.
Xilinx answer 33195 virtex6 fpga embedded trimode ethernet mac wrapper v1. The minimum hardware is a virtex5 lxt or fxt part and a suitable ethernet interface gmii is used on the ml505ml507 but can be changed to sgmii or rgmii. It is used for gigabit ethernet contrary to ethernet 10100 for mii. Virtex6 fpga embedded trimode ethernet mac user guide ug368 v1. Gmii gigabit media independent interface is an ethernet interface standard, and rgmii reduced gigabit media independent interface is intended to be an alternative to gmii. Only essential ethernet functionality is supported.
When designing a network tap on an fpga, the logical place to start is the passthrough between two ethernet ports. Design and realization of gigabit ethernet interface based. Ps and plbased 1g10g ethernet solution application note xilinx. The gem0 block is enabled while generating the hardware system in the vivado tools. The core is available for xilinx 7 series spartan, artix, kintex, virtex, zynq and spartan 6. Trimode 10100 fullduplex fpga ethernet mac in vhdl. Note that the fmc pinout is different for each board. To our valued customers it is our intention to provide our valued customers with the bes t documentation possible to ensure successful use of your micro chip products. In this article, ill discuss a convenient way to connect two ethernet ports at the phymac interface, which will form the basis of a network tap. Ethernet communications interfaces such as tbi, rgmii v2. The rgmii interface has been designed in accordance with the standards and specifications agreed in the hewlett packard document reduced gigabit media independent interface rgmii. Gigabit ethernet example design using vivado for mimas a7.
The ksz9031mnx offers the industrystandard gmiimii gigabit media independent interface media independent interface for connection to gmiimii macs in gigabit ethernet processors and switches for data transfer at mbps or 10100mbps. Xilinx provides a gmii to rgmii logicore for connecting to the zynq7000 integrated ethernet mac the xilinx logicore ip gigabit media independent interface gmii to reduced gigabit media independent interface rgmii design provides the rgmii between rgmiicompliant ethernet physical media devices phy and the embedded gigabit ethernet. Xilinx logicore ip ethernet basex pcspma or sgmii v9. The rgmii interface is a dual data rate ddr interface that consists of a transmit path, from fpga to phy, and a receive path, from phy to fpga. To this end, we will continue to improve our publications to better suit. After creating a bitstream that can be downloaded to a xilinx device, simulate the entire.
The interface defines speeds up to mbits, implemented using an eight bit data interface clocked at 125 mhz, and is backwards compatible with the media independent interface mii specification. It replaces the classic 22wire gmii connection with a low pin count, 4pair, differential sgmii connection. View online or download xilinx logicore ip ethernet basex pcspma or sgmii v9. The rgmii interface has been designed in accordance with the standards and specifications agreed in the. When gmii rgmiisgmii interfaces are used, the fpga requires an exact 125 mhz clock to drive the mbitss communication. Xilinx ug194 virtex5 fpga embedded trimode ethernet mac.
The xilinx logicore ip gigabit media independent interface gmii to reduced gigabit media independent interface rgmii design provides the rgmii between rgmiicompliant ethernet physical media devices phy and the embedded gigabit ethernet controller in the zynq7000 devices. Rgmii receiver logic, spartan3, spartan3e, spartan3a and spartan3a dsp devices, figure 77. Configures the phy autonegotiation to use fullduplex modes only. An inreviun tdsfmclpoe card is used for this example. View and download xilinx logicore ug144 instruction manual online. It possesses a phy address to be accessible on the mdi. The passthrough will be designed in vivado for the zedboard combined with an ethernet fmc. The rgmii interface is the physical connection between the ethernet phy and the ethernet mac.
When you use psgem for zynq7000 is this the correct device you are targeting, you can access to the pl is through the emio which provides the gmii interface. It possesses a phy address to be accessible on the mdio bus. Design and realization of gigabit ethernet interface based on fpga yinan wang, haijun liu, hongshan nie, nan li, zhi huo, zhaolin sun, xin xu esss center, school of electronic science and engineering. Constraint rgmii interface of triple speed ethernet with the. External rgmii receiver logic for virtex4 devices, 1gigabit ethernet mac core, dcm clkin clk0 fb. This xilinx ip appears on the mdio interface along with the regular phy. The ksz9031mnx reduces board cost and simplifies board layout by using onchip termination resistors for. Xilinx ug144 constraints when implementing an external rgmii. Mediaindependent interface mii for 10100 mbs and gigabit mediaindependent interface gmii connectivity miigmii hardware io setup for xilinx spartan 6 family fpgas. This clock is derived from the user supplied external clock using the clock module or pll. Logicore ip trimode ethernet mac and virtex6 fpga embedded trimode ethernet mac wrapper v2.