Rgmii timing analysis software

Hi, i am currently developping a board cith 4 rgmii ports on the virtex 5 fx100t. While registering signals may not be possible for all paths, it simplifies timing analysis and makes it easier for the xilinx tools to placeandroute the design. We show that to achieve correct and accurate timing estimates in modeldriven embedded software design, both modellevel and microarchitectural information need to be considered in the timing analysis. Timing constraints for rgmii community forums xilinx forums. The most common shorthand of reduced gigabit media independent interface is rgmii. Constraint rgmii interface of triple speed ethernet with. Gigabit ethernet transceiver with rgmii support revision 2.

Mar 11, 2015 insert delays required to meet the setup and hold timing requirements of the am335x device and attached rgmii phy. Fpga implementation of realtime ethernet communication using rmii interface. Corergmii is responsible for providing the interface between a standard gigabit media independent interface gmii to rgmii conversion. Responsible for eda software licensing including budgeting, price negotiation, and deployment. Figure 1 shows a block diagram of rgmii implementation. I looked at the specification from xilinx to implement primitive idelayctrl, iodelay, bufg and since i added. The rgmii interface is the physical connection between the ethernet phy and the ethernet mac. The mediaindependent interface mii was originally defined as a standard interface to connect. Management data inputoutput, or mdio, is a 2wire serial bus that is used to manage phys or physical layer devices in media access controllers macs in gigabit ethernet equipment. Timing constraints are required to allow smarttime determine if the timing requirements. Using gcr4 to adjust ethernet timing in msc8144 dsps.

They have implemented a rolldice game with the two fpga devices. Idt frequency timing generator for peripherals 1604c042315 9fgp204 frequency timing generator for peripherals 3 general description block diagram the 9fgp204 is a peripheral clock for intel servers. Thus, rmii operates at 50mhz for 100mb operation while rgmii. Although the hps emac supports rgmii, you can route the emac to the fpga in order to reuse the hps io for other peripherals. Ddr3 timing mt41j64m16bla15e msc8156 datasheet micron ddr3 mt41j64m16 mt41j64m16 s25fl128p 0x01801 ddr3 layout samtec pcie.

Fpga implementation of realtime ethernet communication using. Due to the complications with timing analysis using pllmmcm, will it not be. Provides a bidirectional bridge function for transferring data between rgmii and gmii. Gmii fpga rgmii rgmii constraints 0809 timing diagram isplever lfxp10 rgmii to rgmii text. Psoc creator component datasheet mdio interface features. I noticed that hyperlynx can do timing analysis like setup time and hold time for ddrx boards. Product specification resource utilization for details about resource utilization, visit performance and resource utilization.

The management data inputoutput mdio interface is used to configure the. It is used for gigabit ethernet but can also carry 10100 mbits ethernet. Constraint rgmii interface of triple speed ethernet with the external phy delay feature. Timing simulation should be run after any changes are made and the reference design is merged with the overall design. Fpga implementation of real time ethernet communication using rgmii interface. Internal encrypted hierarchy of the core level ports. Cable analysis function sca is supported by programming mii registers of ip1001 through mdcmdio. Designing rgmii interfaces with fpgas and hardcopy asics this application note describes how to design a reduced gigabit media independent interface rgmii with stratix, arria, and cyclone fpgas and hardcopy asics. For rgmii, the phy supplies the receive clock and the mac supplies the transmit clock.

Cyclone v rgmii example design this design demonstrates how you can route the hps emac into the fpga in order to use fpga io for the interface. Jul 24, 2019 when youre designing your next ethernet interface, you need the right pcb layout and design software to get the job done. Rgmii timing supports onchip delay according to rgmii version 2. Io standard for rgmii interface of ethernet electrical. The maximum clock frequency is obtained by running the timing analysis with the lattice design software. Figure 31 shows a highlevel block diagram of the ksz9031rnx.

I searched for that but didnt get any useful result. Constraint rgmii interface of triple speed ethernet with the. Timequest timing analyzer before you read this application note. The principle objective of rgmii is to reduce the number of pins from 22 down to 12 in a costeffective and technologyindependent manner. I looked at the specification from xilinx to implement primitive idelayctrl, iodelay, bufg and since i added bufg on rxc pads i have issues with the timing contrains for the rxd and rxctl pads on one ports. Tekscope anywhere waveform analysis software brings the power of duration 1m 31s. Reduced gigabit mediaindependent interface rgmii specifies a particular interface between an ethernet mac and phy.

Altddio, altpll, timequest and static timing analysis, and double data rate ddr source synchronous concept. Fpga implementation of real time ethernet communication using. Mbps fpgabased ethernet communications with timing analysis. Clocking diagrams gmii to rgmii ip has a builtin clock generator for prov iding. Transport layer the transport layer defines what should be done with the data. A timing analysis is recommended before the printed circuit board. Constraint rgmii interface of triple speed ethernet with the external. Verify timing of parallel phy interfaces for gigabit ethernet. To invoke designer, layout must be selected in the libero soc software. A timing analysis is recommended before the printed circuit board pcb design has been completed, in case it is necessary to insert additional delays on the rgmii signals connecting the am335x device and attached rgmii phy. Reduced gigabit media independent interface rgmii is a standard interface, which helps in reducing the number of signals required to connect a phy to a mac. Port descriptions this section describes the ports for the gmii to rgmii core. The tx and rx signals should comply with the rgmii spec.

Mdio was originally defined in clause 22 of ieee rfc802. Ip with xgmii and xaui interfaces gmii timing and electrical specification. 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. What is shorthand of reduced gigabit media independent interface. Muntasir hoque junior hardware engineer aversan inc. Verify timing of parallel phy interfaces for gigabit. Xilinx xapp692 using the rgmii to interface with the. Newest rgmii questions electrical engineering stack exchange. The following hardware and software components are required to implement this design. The rgmii interface is a dual data rate ddr interface that consists of a transmit. Can anybody please tell me what io standard does the tx and rx line of rgmii interface support. It may be necessary to adjust pcb delays of individual rgmii signals relative the each other to provide proper timing margins.

Using gcr4 to adjust ethernet timing in msc8144 dsps, rev. Phy is connected to mac with custom rgmii to gmii adapter. Independent interface rgmii core provides the rgmii between rgmii compliant. In order use the correct timing model from quartus, below are the workarounds.

The serial gigabit mediaindependent interface sgmii is a variant of mii, a. Rgmii timing supports onchip delay according to rgmii. However, the ber analysis becomes overly pessimistic for longer crosstalk data patterns. Tells timing analysis that there is a phaseshift externaly. Hello, im constraining a double data rate rgmii input interface. Srinath devalapalli director, digital implementation. Gigabit ethernet transceiver with rgmii support microchip. Udp is a very simple protocol and is perfect for streaming sequences e. Codelevel wcet analysis determines worstcase timing behavior of a program. Instead, separate write commands are used to program each phy device. Timing constraints are essential to ensure that the right choices are made by the synthesis tool while performing logic and mapping optimizations of the design. For corergmii, advance the timing by one clock cycle to havethe correct edges used for timing analysis, refer to. The serial gigabit mediaindependent interface sgmii is a variant of mii, a standard interface used to connect an ethernet mac block to a phy.

The ip header is evaluated or generated by software. And from a software perspective all you need to do is to install the driver in windows. Advanced jitter and noise analysis as serial data speeds increase. Verify timing of parallel phy interfaces for gigabit ethernet ee times. Mii and rmii routing guidelines for ethernet advanced. The timing diagram for the transmit side figure 2, page 3 shows two clock cycles of delay before data and control signals are presented on the rgmii interface. This layer is based on the following two popular protocols. Analysis was carried out for various values of decoupling capacitors to calculate appropriate one and meet the given rgmii specification timing requirements. Separating noise and jitter for analysis is a useful tool for crosstalk analysis and can yield very accurate ber eye results for shorter prbs patterns. One of the definitions of rgmii is reduced gigabit media independent interface. Although the hps emac supports rgmii, you can route the emac to the fpga in. Corelis offers bus analysis tools, embedded test tools, and the industrys broadest line of jtagboundaryscan software and hardware products that combine exceptional easeofuse with advanced technical innovation and unmatched customer service. Additionally, the ability to change timing constraints and directly run a timing analysis without reimplementing the design significantly speeds the timing closure process.

Im working on a design to prototype using the osd335xsm for a future project, and in starting to draw up the ethernet phy ive noticed that the osd335xsm is set up for rmii, but i was. The methods in this document describe how to set up an rgmii specific timing budget and determine. The management of these phys is based on the access and modification of their various registers. All signals are synchronous with a 125 mhz clock signal. Dec 03, 2010 i noticed that hyperlynx can do timing analysis like setup time and hold time for ddrx boards. In summary, when using axi ethernet subsystem, you must disable tx clock skew in the phy and ensure that there is no skew added by the tx clock trace on the. If mdio access is available, and software configuration is possible, rgmii internal delays can be set on. Ti recommends you perform a timing analysis of this interface taking into account any pcb delays and specific timing requirementsswitching characteristics of both am3352 and attached rgmii device. Can it also do timing analysis for any other genral board.

Synthesis software uses timing constraints to make tradeoffs that lead. Smartfusion2igloo2 fpga timing constraints users guide. Crosstalk analysis in highspeed serial links evaluation. It is driven with a 25mhz crystal and generates a variety of clocks, including 125mhz rgmii. Ee times connects the global electronics community through news, analysis. In order use the correct timing model from quartus, below is workaround. From hps specifications on rgmii and tis description of rmii mode, rmii is a subset of the rgmii pins, dropping 2 each of tx and rx.

Focusing on such standard parallel phy interfaces for gigabit ethernet as rgmiiv2. Mii and rmii routing guidelines for ethernet advanced pcb. Allegro pcb designer and cadences full suite of design tools are. This design example is build based on cyclone v soc gsrd golden. The tables below summarizes the timing specifications of rgmiiv1. Fpga implementation of real time ethernet communication. Feature packed timing software take control of your events with rm timing. When youre designing your next ethernet interface, you need the right pcb layout and design software to get the job done. Reduced gigabit media independent interface rgmii features reduced gmii interface to physical layer capable of working at 1 gbs, 100 mbs and 10 mbs data rates selectable rgmii or reduced. This core can be used in all three modes of operation10100 mbs. The best way to assess rgmii timing is to look at the datasheet report implemented design report timing summary options report datasheet. Gigabit ethernet transceiver with rgmii support mouser electronics.

The focus is on the use of modelling techniques based on the socalled quirkmodel, initially developed in the united kingdom and, over the past decade, extensively developed in institutions in. This reference design provides a bidirectional bridge function. Timing analysis of realtime software is not a designers handbook. Xilinx xapp692 using the rgmii to interface with the gigabit. A subsidiary of electronic warfare associates, inc. If you are using the ethernet fmc, the phy is the marvell 88e1510, and the ethernet mac is inside the fpga. Max24287 1gbps paralleltoserial mii converter general description the max24287 is a flexible, lowcost ethernet interface conversion ic. 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 parallel interface can be configured for gmii, rgmii, tbi, rtbi, or 10100 mii, while the serial interface can be configured for 1. Mbs fpgabased ethernet communications with timing analysis. Rgmii to gmii bridge april 2005 reference design rd1022 introduction gmii gigabit media. No longer will you be locked into expensive timing chips and special hardware. Ethernet physical media devices phy and the gigabit ethernet controller. Rgmii as abbreviation means reduced gigabit media independent interface. Timing analysis of realtime software raimund kirner vienna university of technology austria this is joint work with peter puschner and the costa and. To close the source synchronous timing of corergmii, enable cross clock domain analysis. The parallel interface can be configured for gmii, rgmii, tbi, rtbi, or 10100 mii, while the serial interface can be configured for. Synthesis software uses timing constraints to make tradeoffs that lead to optimum use of resources to achieve requested timing goals. Allegro pcb designer and cadences full suite of design tools are designed with the layout and verification tools you implement mii and rmii routing guidelines. Open alliance rgmii epl epl recommendation for automotive application. It is unwanted relationship not to be analyzed in timing analysis. Lattice diamond software includes a new timing analyzer view that provides a rich graphical interface to viewing timing constraint paths, reports, and schematics.