Serial gigabit media independent interface, it is used to interface the mac layer of the ethernet to the phy layer. The alaska 88e1543 device s upports sgmii on the mac interface in a copper to sgmii application. This resistor integration simplifies board layout and reduces board cost by reducing the number of external components. The serial gigabit mediaindependent interface sgmii is the interface with. This core supports cisco qsgmii specification version 1. Phys transceivers alaska 88e1112 technical product brief marvell. Qsgmii, like sgmii, uses lowvoltage differential signaling lvds for the tx and rx data, and a single lvds clock signal. So your ethernet chip would connect to a basex phy using sgmii. The reference designs offer the following features. Ethernet datasheet qad sera gat meda indeendent interace. The serial gigabit media independent interface sgmii is a connection bus for ethernet macs and phys. To transmit ethernet data via the sgmii protocol, data leaving the mac will have to be serialize while incoming packet from the phy will be deserialize hence a.
It replaces the classic 22wire gmii connection with a low pin count, 4pair, differential sgmii connection. It is utilised for gigabitethernet contrary to ethernet 10100 for mii. Complementing the industrys mostintegrated ieee 1588v2 device is a precision timing protocol ptp v2 software stack that has been prequalified with the ksz84xx product family. It is used for gigabit ethernet but can also carry 10100 mbits ethernet. The serial gigabit media independent interface sgmii protocol provides connectivity between the physical layer phy and the ethernet media controller mac. Serial gigabit media independent interface sgmii presents itself as one of the solution to convey network data up to mbps with significantly less pin counts compared to gmii alone. The serial gigabit media independent interface sgmii is a popular gigabit ethernet phy interface, and it holds various advantages over both gmii and rgmii. In other words, it is about txd and rxd signals from mac to phy. Required register configuration when switching to rgmiitobasex mode using software. Logicore ip quad serial gigabit media independent v1. Just a standard set of pins between the mac and the phy, so that the mac doesnt have to know or care what the physical medium is, and the phy doesnt have to know or care how the host processor interface looks.
The mii was standardised a long time ago and supports 100mbitsec speeds. This resistor integration simplifies board layout and reduces board cost by. May 15, 2018 rgmii is a 12pin interface, while sgmii can operate as either a four or sixpin interface. Mii media independent interface is about the connectivity between mac and phy. The eastbound interface from the mac provides a configurable 64bit system interface. Cyclone 10 gx and lp fpgas allow you to easily implement the serial gigabit media independent interface sgmii for 10100 mb or gigabit ethernet. On the front end, the logicore ip can also interface seamlessly to four ethernet macs through a builtin gigabit media independent interface gmii. Pcs for quadserial gigabit media independent interface. The serial gigabit mediaindependent interface sgmii is the interface with the lowest pin count available for connecting compatible macs and phys.
That means it needs to be connected to a sgmii mac. Mdi media dependent interface is about the connectivity between phy and connectorjackrj45. With a mixture of 100mbps and 1gbe nodes, system designers prefer to develop common, reusable platforms that support both types of nodes. Basex and sgmii interfaces are implemented using transceivers in. Altera corporation sgmii interface implementation using soft cdr mode of altera fpgas send feedback an518 6 interfacing 2. The quad serial gigabit media independent interface qsgmii is a method of combining four sgmii lines into a 5 gbits interface. Sgmii interface implementation using softcdr 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. Max24287 1gbps paralleltoserial mii converter general description the max24287 is a flexible, lowcost ethernet interface conversion ic.
My understanding is that sgmii sfp module has sgmii phy in it, so the sgmii on the host board has to be sgmii mac which dp83867 does not support. In rgmiitosgmii bridge mode, the rgmii interface must be connected to an ethernet. The pcs sublayer supports both 6466b encoding 10ge and 8b10b encoding sgmiibasex with an optional fec layer function for backplane 10gkr application. Ksz8463 interface and networking ethernet switches. A newly added feature on some microchip gigabit ethernet switches is a serial gigabit media independent interface sgmii for one of the ports. The device also integrates mdi interface termination resistors into the phy. Ok, but datasheet for marvell 88e1512 says that rgmii is a system interface, while sgmii is a media interface i. The ksz9567 is a fully integrated layer 2, managed, sevenport gigabit ethernet switch with numerous advanced features. What is the abbreviation for serial gigabit media independent interface.
This ip is available through core generator software at no charge to help you accelerate your time to market. Application note an2036 frequently asked questions regarding. 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. 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.
This interface supports 10, 100 and baset modes of operation, as mentioned above. This is a low pin count interface for connecting the switch to a gigabit ethernet phy, to a fiber optic transceiver, or to another switch. Pcs for quadserial gigabit media independent interface qsgmii. The parallel interface can be configured for gmii, rgmii, tbi, rtbi, or 10100 mii, while the serial interface can be configured for 1. It interfaces directly to twisted pair media through an external transformer. There appear to be both sgmii and serdes versions of baset sfps. Vsc851202 datasheet 12port 10100baset phy with sgmii and qsgmii mac. You are trying to design dp83867 on the host board with sfp and copper media. The device can be also configured to operate in sgmii system to auto media. Sgmii interface implementation using softcdr mode of altera fpgas stratix iv. Im not sure i can use this device with both rgmii and sgmii as system interface i. It can also be used as a serial communication bus between the powerquicc mpc83e and other peripherals such as through a backplane. 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. Current variants include, reduced mediaindependent interface rmii, gigabit mediaindependent interface gmii, reduced gigabit mediaindependent interface.
The serial gigabit media independent interface sgmii is a variant of mii, a standard interface used to connect an ethernet mac block to a phy. This device interfaces directly to the mac layer through reduced gmii rgmii or embedded clock serial gmii sgmii. The finisar baset sfp can be used with a sgmii rev. Alaska 88e154588e154388e1548 integrated 10100 mbps. It is used for gigabit ethernet but can also carry 10100 mbit ethernet. Required register configuration when switching to rgmiitocopper mode using software. Sgmii interface, the quartus ii software automatically selects the same pll to drive these multiple. In gigabit ethernet its the sgmii serial gigabit media independent interface. Lowpower, robust gigabit ethernet phy transceiver with sgmii. Gmii and sgmii for direct connection to a macswitch port. Were trying to understand the consequences of doing this vs. Supported media access control mac interfaces are mii.
What is the exact difference between sgmii and basex. Data transfer between mac and phy is via the reduced gigabit media independent interface rgmii for baset, 10baset, and 100basetx. Lan9355 interface and networking ethernet switches. The pcs for quadserial gigabit media independent interface qsgmii pcs multiplexes four gmii interfaces over a single macphy serial interface operating at 5ghz. The mii may connect to an external transceiver device via a pluggable connector see photo or simply connect two chips on the same printed circuit board. 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 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. The values for caps is depend on the length of differential signals 10nf to 100nf for better termination. Network interface adapter, mau media access unit, cnr communication and network riser, acr advanced communication riser, ethernet hub, and ethernet switch. It differs from gmii by its lowpower and low pincount serial interface commonly referred to as a serdes.
On our product, the sfp cages are hooked up directly to the serdes pins coming off the switch. The sgmii solution for altera fpgas allows you to implement and multiport gbps ethernet gbe systems with high port counts, lower power, and low cost requirements. Microchips lan9355lan9355i is a highperformance, smallfootprint, fullfeatured 3port managed ethernet switch. Integrated 10100 mbps energy efficient ethernet transceiver. Configuring sgmii ethernet on the powerquicc mpc83e processor. Review of ethernet sgmii concepts mind chasers inc. Five of the seven ports incorporate 10100 mbps phys. Max24287 1gbps paralleltoserial mii converter microsemi. Qad sera gat meda indeendent interace qsgmii ip overview cadence ip factory delivers custom, synthesizable ip to support specific design requirements. The sgmii can also be used on media line side to connect to sfp modules that support basex, 100basefx and sgmii. These devices have builtin serializerdeserializer serdes circuitry that supports highspeed. Phy with sgmii, serdes, gmii, mii, tbi, rgmii rtbi mac interfaces.
This device is applicationoptimized for consumer, embedded and industrial electronic designs which require a highly integrated, cost effective device with switching functionality, flexibility and ease of integration. 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. Extensive general purpose io gpio capabilities are available to use with the ieee 1588v2 ptp to efficiently and accurately interface to locally connected devices. An ethernet port connection that allows network hubs or switches to connect to other hubs or switches without a nullmodem, or crossover, cable. 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. An2647 interfacing the sgmii port on ksz9xx7s and ksz8567s. It could instead connect to a baset phy device using the same sgmii interface. Implementation of one triplespeed ethernet ip core instance supporting 10100mbps ethernets operations with rgmii or sgmii with autonegotiation. In addition, the sgmii can also be used as media interface for fibersfp applications. It also supports copperfiber auto media applications with rgmii as the mac interface. Sgmii interface implementation using soft cdr mode of altera fpgas 20. The serial gigabit media independent interface sgmii is a connection bus for. A functional block responsible for implementing the media access control layer, which is a sublayer of the data link layer. It is built upon our existing serial gigabit media independent interface pcspma ip.
Configuring sgmii ethernet on the powerquicc mpc83e. The dp83867 is designed for easy implementation of 10100 mbps ethernet lans. You can achieve data communication for sgmii interfaces using the soft cdr and dpa modes in the receiver data path. Sgmii abbreviation stands for serial gigabit media independent interface. Sgmii interface implementation using soft cdr mode of. Vsc851202 datasheet 12port 10100baset phy with sgmii. Optical fiber channel that meets gigabit ethernet protocol requirments. The other two ports have interfaces that can be configured as sgmii, rgmii, mii or rmii. The ethernet basex pcspma or serial gigabit media independent interface sgmii core provides a flexible solution for connection to an ethernet media access controller mac or other custom logic. These two devices are connected using a media independent interface mii. It consists of pairs of txdata, rxdata, and rx ref clk data pins. Indicates potential damage to hardware or software, or loss of data. This trimode core is configurable through software register. The four data streams are multiplexed over a single serial data stream according to the qsgmii spec.
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