A regulator design for a serdes phy of a high speed serial data interface. Serdes implementation guidelines for keystone devices. 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. This sgmii solution meets the sgmii specification and saves cost and power in systems that have low to high portcount gigabit ethernet per device. In addition, the example design provided with the core supports both verilog and vhdl. When the i210 is configured for sgmii, it will only operate a marvell 88e1111 88e1112 phy. Convey complete mii information between a 10100 phy and mac with two pins per port allow multi port macphy communications with one system clock operate in both half and full duplex.
What is the exact difference between sgmii and basex. Eoptolink sgmii sfp is designed for 100basefx applications, with buildin phy device supporting sgmii interface. The old phy in the previous design made the layout really simple where the pairs were in the right order so all we had to do is bring them into the sfp form the skinny end. All has gone well but i have having second thoughts regarding the differential pairs that make up the sgmii interface between out gigabit ethernet phy and sfp cage. This interface supports 10, 100 and baset modes of operation, as mentioned above. The spi block consists of transmitter and receiver sections. They are designed to enable a new generation of low port count, costsensitive and power efficient 10100mbps switch systems. In gigabit ethernet its the sgmii serial gigabit media independent interface. Max24287 1gbps paralleltoserial mii converter microsemi. Serial rapidio srio antenna interface aif hyperlink. Sgmii to sgmii connection processors forum processors. Apr 24, 2012 the sgmii serial gigabit media independent interface is a supplement of mii,a standard interface used to connect an ethernet macblock to a phy.
Microsd card interface, micro sd card interface connector j83 molex 5025700893 33 5 usb jtag interface, wmicrob connector digilent usb jtag module 16 6 clock generation, sysclk and other clocks, 1. The serdes circuitry is configured to support source synchronous and asynchronous serial data communication for the sgmii interface at 1. Resolved c6678 dsp dp83867 phy sgmii link up issue. Reduced gigabit media independent interface rgmii technical. This document also includes schematic diagrams, a printedcircuit board layout, board assembly, board marking drawings, and a bill of materials. So your ethernet chip would connect to a basex phy using sgmii. It uses differential pairs at 625 mhz clock frequency ddr for. The mediaindependent interface mii was originally defined as a standard interface to connect. Ethernet datasheet qad sera gat meda indeendent interace. The pcs core can be used with sgmii phys, supports sgmii 10100 or gigabit operation with data duplication and sgmii autonegotiation according to the cisco specification. The 20pin connection diagram of module printed circuit board of. It is further assumed that the sfp module discussed in this interface is ac coupled, which is the typical connector in the sgmii systems. Rgmii uses half the number of data pins as used in the gmii interface.
Latticeecp2mmarvell serialgmii sgmii physical layer interoperability figure 2 illustrates the smb2000 analyzer with a baset copper module gx1420b, rightmost module with rj45 cable attached. Interface sgmii core, customizing and simulating the core using the provided example design, and running the design files through implementation using the xilinx tools. The finisar baset sfp can be used with a sgmii rev. The arria 10 sgmii reference design provides a set of essential hardware and software system components that can be used as a starting point for various custom user designs. In the system, it is reasonable to select gmii and sgmii. The serial gigabit media independent interface sgmii protocol provides connectivity between the physical layer phy and the ethernet. Qad sera gat meda indeendent interace qsgmii ip overview cadence ip factory delivers custom, synthesizable ip to support specific design requirements. Smii serial mii ethernet interface chapter 1 overview the serial media independent interface smii is designed to satisfy the following requirements. Pdf design and realization of gigabit ethernet interface based on. And also one ethernet device driver should work with the nic hardware. Logicore ip quad serial gigabit media independent v1. I know how to use the rgmii mode ethernet by using tri mode ethernet mac ip on kc705 board. The mdi side is autonegotiated to mbps with no problems.
It replaces the classic 22wire gmii connection with a low pin count, 4pair, differential sgmii. The problem is about the link up in the sgmii interface. Linking cpus with rgmii interfaces to sgmiibased switches. In addition, the example design in this guide is provided in both verilog and vhdl formats. Lowpower, robust gigabit ethernet phy transceiver with sgmii.
The sgmii solution for alterafpgas allows you to implement multiport gbps ethernet gbe systems with high port counts, low power, and low cost requirements. It uses differential pairs at 625 mhz clock frequency ddr for tx and rx data and tx and rx clocks. From vc707 board schematics, seems that sgmii gtx transceiver belongs to bank 1, so use clock pins ah8 p and ah7 n to drive sgmii interface. Hi, i have a customer that is having a hard time getting his 6678 connect to an sgmiigmii bridge max24288. Theserialgigabitmediaindependentinterface sgmii protocolprovidesconnectivitybetweenthephysical layer phy and the ethernet media controller mac. The rgmii specification document can be downloaded from.
Typically works with the hardware engineer to decide the design of the custom board, pin muxing, and to update the board xml file used by the device tree generator hardware engineer. It replaces the classic 22wire gmii connection with a low pin count, 4pair, differential sgmii connection. Sgmii connectivity using an altera fpga through copper sfp transceiver. Autonegotiation is controlled and monitored via the pqiii tenbit interface tbi and the tbi mii set of registers. Ksz8863 interface and networking ethernet switches. Application note an2036 frequently asked questions regarding. It is used for gigabit ethernet but can also carry 10100 mbits ethernet. The serial gigabit mediaindependent interface sgmii is a variant of mii, a standard interface used to connect an ethernet mac block to a phy.
Examples of max24287 and phy management using mdio. The serial gigabit media independent interface sgmii is a popular gigabit ethernet phy interface, and it holds various advantages over both gmii and rgmii. Gigabit phy device is integrated internally, lcp1250rj3srs features compliant with specifications for ieee 802. The sgmii serial gigabit media independent interface is a supplement of mii,a standard interface used to connect an ethernet macblock to a phy. Review of ethernet sgmii concepts mind chasers inc. These two devices are connected using a media independent interface mii.
It is utilised for gigabitethernet contrary to ethernet 10100 for mii. This application note provides detailed information of possible applications for. The example was modified to use the sgmii 0 port instead. It differs from gmii by its lowpower and low pincount serial interface commonly referred to as a serdes. Rgmii constraints basex ds297 sgmii specification ieee switch sgmii mii gmii rgmii phy xilinx spartan ucf file 6 sgmii xilinx. Besides, sgmiibaset is often used with sfp pluggable transceivers which have an i2c interface instead of mdio for management registers access.
Ethernet quad serial gigabit media independent interface. Within the pqiii devices the pcs and pma layers are implemented within the etsec via the ten bit interface tbi. The core interfaces to a devicespecific transceiver, which provides some of the pcs layer functionality such as. Moreover, the cisco sgmii specification is comprised of more than just a bus interface definition. Sgmii interface implementation using soft cdr mode of. The cadence qsgmii ip provides the logic required to integrate a quad serial gigabit media independent interface with qsgmiimodified pcs functionality into any system on chip soc. Lcp1250rj3srs supports the sgmii interface without clock on mac side. Ug0447 user guide smartfusion2 and igloo2 fpga high. Tn13 latticeecp2mmarvell serialgmii sgmii physical. The evm is capable of providing a 125mhz reference clock from an onboard 25mhz crystal. The rgmii interface has been designed in accordance with the standards and specifications agreed in the. Application note an2036 frequently asked questions. The two standards supported are sufficiently similar to be supported in the same core.
It can also be used as a serial communication bus between the powerquicc mpc83e and other peripherals such as through a backplane. E18, e19 are belongs bank 38 you should not use these clocks to gt ref clock. The quad serial gigabit media independent interface qsgmii core provides a flexible solution for combining four serial gigabit media independent interfaces sgmii into a single 5 gigabits per second gbs interface, to significantly reduce the number of input outputs ios. So if you want to do sgmi to sgmii youre going to have to pick a format and have your code for that. The standard serial id information compatible with sfp msa describes the transceivers capabilities, standard interfaces, manufacturer and other information. The mdi side of the phy is connected to a pc through a cat5 ethernet cable. The gx1420b module is also shown to the right of the screen.
Description fiberbit sgmii sfp is designed for 100basefx applications, with buildin phy device supporting sgmii interface. Sgmii link exchange sgmii is the mode of communication between the mac and phy that allows for copper 10100baset ieee 802. It could instead connect to a baset phy device using the same sgmii interface. Dp83tc811 systems and reference schematics texas instruments. We have a custom board containing c6678 dsp which is connected to a dp83867 phy via the sgmii interface. Serdesbased interfaces on the keystone i family of dsp devices. I am going to use ethernet on kcu105, the phy is configured as sgmii mode only on the eval board.
Not all the people involved in a project need to deal with the full flow. Ieee94 is a standard which is developed by american institute of electrical and electronics engineers ieee in 1995, the purpose is to provide a lowcost and fast transmission speed serial interface, which have the speeds of 400mbs,800mbs, 1. Implementing sgmii interfaces on the powerquicc iii. The core can seamlessly connect to any industry standard gigabit ethernet serdes serializer deserializer device via a gigabit tbi ten bit interface and to mac layer device. Getting started guides booting linux using prebuilt sd card image. 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 assignee of the present application developed the sgmii serial gigabit media independent interface to reduce the pin count to 6 pins per interface. From vc707 board schematics, seems that sgmii gtx transceiver belongs to bank 1, so use clock pins ah8 p and ah7 n to drive sgmii interface in shared design schematic independent clock bufg, signal detect connected to ground, it shouldnt be.
In addition to the security engine, new highspeed interfaces, such as sgmii interface on enhanced. Usually works only on the fpga quartus project, and notifies the firmware engineer whenever the hardware. As is known in the art, sgmii uses two data signals and two clock signals to convey frame data and link rate information between a 10100 phy and an ethernet mac. The devicespecific transceiver is connected to an external. When the stop bit is asserted, the state machine finishes generating the current packet and then stops the operation. Figure 3 illustrates the gui command console for the smb2000. Low power consumption, advanced power management and sophisticated qos features e. Serial management interface, mdiomdc, is supported and can be. Controller is the main ethernet controller on the chip and has provisions for various types of interfaces for connecting to phy, like mii, rmii, gmii, rgmii, tbi etc. Sgmii interface implementation using soft cdr mode of altera fpgas. The serial gigabit mediaindependent interface sgmii is the interface with the lowest pin count available for connecting compatible macs and phys. The values for caps is depend on the length of differential signals 10nf to 100nf for better termination.
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. Sgmiiserdes interface sounds like you connected sgmii device in cdr mode, so in that case you have to place ac coupling caps near receiving end. Data rates of 25 mbs or 250 mbs are not supported for the 2. Pdf ds710 ml605 ucf file iodelay virtex6 ml605 user guide switch sgmii mii gmii ramb36s example ml605 ethernet fpga rgmii basex xilinx basex sfp sgmii rgmii to sgmii. The table below shows how to enable sgmii and advertise all speeds and fullhalfduplex using register writes to the phy over the 2wire serial interface see question 5. You can load the sgmii image on the i210, it will expect an external sgmii phy to be connected to the mdio i2c interface. This document will address system, hardware, and software considerations as well as advantages and limitations for each.
For detailed information about the core, see the 1g2. The ethernet basex pcspma or sgmii ip core is a fullyverified solution that. Oct 22, 2017 the serial gigabit media independent interface sgmii is a popular gigabit ethernet phy interface, and it holds various advantages over both gmii and rgmii. Then i added an sgmii interface and connected the sgmii port on this ip to this interface. Serial gigabit media independent interface sgmii interfaces peripheral component interconnect express pcie serial rapidio is an industrystandard high speed switchedpacket. When i run synthesisimplementationgenerate bitstream i get errors about the sgmii interface pins rxn, rxp, txn, txp missing from the constraints file. Connecting external marvell phy with sgmii community forums. Configuring sgmii ethernet on the powerquicc mpc83e.
Figure 3 illustrates sgmii configuration and autonegotiation. Each of the seven osi layers exchanges information with. Triple speed ethernet data path reference design if you want to stop the operation before it is finished, you can issue a write to set the stop bit of the operation register, causing the current running operation to terminate. Sgmii interface implementation using softcdr mode of stratix iii devices device. The sgmii specification is closely related to basex in that each utilizes the same physical coding sublayer pcs and physical medium attachment pma layers as is defined by basex 802. The ksz8863mllfllrll are highly integrated 3port switch ics in a small footprint. Applications switch to switch interface switched backplane applications file server interface module diagrams figure 1 illustrates the major functional components of the abcu57xxxxz family of transceivers. Sgmii interface implementation using softcdr mode of. A regulator design for a serdes phy of a high speed serial. But i have no idea about sgmii interface i studied that temac will be use with pcs pma or sgmii ip for sgmii ethernet. Configuring sgmii ethernet on the powerquicc mpc83e processor. If it gets no response on that interface, the driver will report the device inoperable and exit. This core supports cisco qsgmii specification version 1. A10 sgmii reference design user manual documentation.
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