Rmii routing guidelines. 7mm (depending on results).
Rmii routing guidelines 7 %âãÏÓ 829 0 obj > endobj 843 0 obj >/Encrypt 830 0 R/Filter/FlateDecode/ID[5EE268C5D89392D0BBCF5BC4EF98467E>]/Index[829 61]/Info 828 0 R/Length 84/Prev 2 RMIITM Specification Rev. I have follow the advanced course of Fedevel so i have set the xsignal roules for length match and set the impendece to 50ohm. S32G2 Data Sheet S32G2 - NXP Semiconductors 2 Have a custom board design using the OSD3358 C-SiP and TI DP83822 PHY, both are configured for MII. First things first, there are some important points to note about the overall architecture of Ethernet-capable devices and the associated routing standards. ti. HPS EMAC PHY Interfaces 5. I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. MII and RMII have round-trip time restrictions, since the TX data path on MII is destination synchronous, and the RX data path on RMII is destination synchronous. 3. Intensive layout planning is mandatory for a successful PCB design. Routing Checklist for the LAN8740, 32-pin QFN Package SMSC 80 Arkay Drive Hauppauge, New York 11788 When using the LAN8740 in RMII mode, place the 50 MHz clock oscillator approximately Following these guidelines and other general design rules in PCB construction should ensure a clean operating system. 7. rabbit. In this routing maximum trace length is 2. 3 standard; furthermore, it supports both MII and RMII interfacing to the PHY. 1 Discrete DC-DC Power Solution. RX Family Ethernet Hardware Design Guide R01AN3342EJ0101 Rev. DP83620: RMII routing guidelines - length matching tolerance. 1 Use of inner and outer layers If the power supply network and grounding is designed as described Section 3, the MII, RMII and RGMII 3. The skew imposed on the clock and data shall be chosen carefully to ensure meeting the requirements of the interface as described in the next section. when I put the ethernet there is a long 9 RMII/MAC Connection 4 TLK1XX Design and Layout Guide SLVA531A–February 2013–Revised September 2013 Therefore, the same MDI signal routing recommendations described in Section 7 apply to Fiber-enabled systems as well. 4. Typical Ethernet switch and PHY application 2. Learn about media independent interface variants for routing Ethernet links, including gigabit variants for 1 GbE and faster links. The AM263x LaunchPad and AM263x controlCard EVM designs both integrate a set of buck-converter, DC-DC I'm drawing the layout for an RMII interface, but I have two doubts: 1 - Do RMII interface traces need length matching? 2 - Do the traces of the RMII interface have to be impedance controlled? I ask Just follow good routing practices don't use too many vias, and don't split the ground plane. We are able to detect and ping from 1Gbps PHYs and able to detect the 2 100mbps but unable to ping. MII (media-independent interface I founds lots of guidelines online (although some conflicting, so I need to tread carefully). We will also try to understand the layer stack-up for the Ethernet interface and explore specific guidelines related to MII, It provides recommendations on the implementation of multipurpose media-independent interfaces MII/ RMII, RGMII and SGMII, including multiple implementations of these interfaces. While I’ve tried to provide a good guide to the basics of successful gigabit Ethernet routing, it’s always a good idea to follow the recommended layout and guidelines in the datasheet of the ICs you are working with. Here are some recommendations for the data lane signal layout. Ethernet PCB Routing Guidelines. Using u-boot and Linux, based on your RED platform with I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. 1 2 2 Overview This document provides useful guidelines for the design and layout of printed circuit boards utilizing the VSC8541 and VSC8531 Single Port Gigabit Ethernet PHY and the VSC8540 and VSC8530 Single Port Fast Ethernet PHY. If the designer has elected to use impedance VSC8211 Design and Layout Guide (VPPD-01173) VSC8224 Design and Layout Guide (VPPD-01145) 2. The birth of Gigabit Ethernet brought about GMII, the Gigabit Media Independent Interface. In RMII Master operation, the PHY operates off either a 25-MHz CMOS-level oscillator It provides design guidelines when using the RA MCU with RMII modes for Ethernet specific applications. The /P and /Q variants do not feature an SGMII port and remain 100 % pin-compatible with the SJA1105/SJA1105T switches. RMII signals considered critical should be routed on the top layer next to a contiguous, digital ground plane. Some general design rules for differential pair routing are given here. • It is recommended to route all signals of the same data lane (TX or RX) on the same layer. Linked. DDR Routing Guidelines. Critical Signals (continued) Signal Name Description HDMI_DATA1x High-Definition Multimedia Interface (HDMI) differential data pair, positive or negative 9 RMII/MAC Connection 4 TLK1XX Design and Layout Guide SLVA531A–February 2013–Revised September 2013 Therefore, the same MDI signal routing recommendations described in Section 7 apply to Fiber-enabled systems as well. 3dg 100 Mb/s Long -Reach Single Pair Ethernet Task Force 4 • 802. c Page 4 of 8 3. It uses differential pairs at 625 mhz I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. 01 Page 4 of 9 Jan. We are using DP83620SQE this in our design. 01 AN7012 Application Note for 64-bit NuMicro® Family Document Information Abstract This MA35D1 hardware design guide is intended for hardware system designers who require a hardware implementation overview Download the industrial gigabit Ethernet PHY reference designhttps://www. AN-1469 PHYTER Design & Layout Guide for RMII routing guildeines. You’ll want to pay equal attention to the digital connection between the ethernet MAC and PHY. When tasked Design and Layout Guide VPPD-04420 ENT-AN1231 Application Note Revision 1. I'm trying to implement RMII from STM32F7 through PHY to 服务器出错，请稍后重试1 IEEE 802. 2 IEEE Standards CSMA/CD Access Method and Physical Layer Specification (IEEE802. 2. 31. 0 Application The RMII specification has been optimized for use in high port density interconnect devices which require independent treatment of the data paths. I'm assuming that the interface you're routing is RMII. (Default) RGMII: No effect 1 = MII: MAC mode RMII: Normal mode. Find reference designs and other technical resourceshttps://www. 01 AN7012 Application Note for 64-bit NuMicro® Family Document Information Abstract This MA35D1 hardware design guide is intended for hardware system designers who require a hardware implementation overview Design Guidelines for HPS Portion of Arria 10 SoC FPGAs 4. CLOCK is output normally, but it fails if there is a problem with SYNC. In addition, if the CLK_OUT pin is to be used as a 50 MHz Where in course material can I find this particular coverage? I think the aspect of routing/stacking/ground plane design would an excellent area to be covered in the course, considered in the IoT world ethernet connection would be essential for all the boards (well, unless you're talking about wireless). com l info@toradex. 3 Pattern Design 1. toradex. Ethernet-Capable Device Architecture. 6 AN-1469PHYTER Design & Layout Guide SNLA079D– October 2006– Revised April 2013 are the same. When looking at the datasheet of LAN8742A, page 110 of the datasheet TX, TXEN setup time to rising edge of REFCLKO is 7. MII (media-independent interface) is the standard used to connect the MAC (media access control) block to the PHY (physical) layer for networking devices. One thing I cannot seem to find are guidelines for the PHY to the micro. com Additional Reference Information Consult the Rabbit 5000 Microprocessor User’s Manual, the Rabbit 6000 Microprocessor User’s Manual, or the User’s Manual for your RabbitCore module for additional reference information. Ground and power planes should i'm designing a pcb with an ethernet interface RMII with long nets from the mcu using altium. MX28 processor. Write 0x0 to Register 0x13 (PAGESEL). Furthermore, the SGMII interface available on the /R and /S variants extends the connectivity options of the switch. • Simplify the task of routing traces. Thus, component placement and routing strategies have a significant impact on ethernet routing. LVDS-PCB-Layout-Guidelines zur Gewährleistung der RMII mode: • RX_CLK • RXD[3:2] • COL • TXD[3:2] • TX_ER • TX_CLK NOTE: TXD[3:2] should be pulled low to put these inputs in a known state. (Tsu) Application Note for 32-bit NuMicro™ Family Document Information Abstract This document introduces how to use the NUC980 series and describes the minimum hardware resources required to develop a basic system. Your PCB foundry should be able to supply you with additional reference Is there any board hardware guidelines available for this ? The LAN8742A is used in REF_CLK OUT mode (50 MHz clock output from the PHY routed to the RMII_REF_CLK input of the STM32). Furthermore some recommendations of the specific realization for the Ethernet PHY are described. RMII uses a single centralized system-synchronous 50 MHz clock source (REF_CLK) Account for routing delay differences from the REF_CLK source to REF_CLK input pins between the HPS EMAC and PHY . 16mm. 1 MII/RMII/SDRAM Signal Patterns The following are some precautions for when designing MII, RMII, and SDRAM signal patterns. htmlIn this training you will learn how to design a 1 Das Routing zwischen MAC und PHY folgt über die MII- oder RMII-Routing-Standards mit Punkt-zu-Punkt-Topologie. 5v power supply can be used as well for rgmii and rtbi modes, as specified by the rgmii/rtbi standard. In order to accomplish this objective, the data. Set bits 14 (RMII_MASTER) and 5 (RMII_MODE) to 1 in Page 0 Register 0x17 (RBR). This is difficult to solve in H/W when making a PCB board, so REF_CLK of RMII is modified to GPIO17. Trace length matching to be within 2 inches. Quick overview of some general high-speed PCB design tips. 15cm and minimum trace length is 1. Part Number: DS125MB203 Other Parts Discussed in Thread: DS100MB203 , Hello Would like to 01 = RMII 10 = Reserved 11 = MII RXD7_1 (not applicable to KSZ9567S, KSZ9477, KSZ9896, and KSZ9897S) Port 7 MII/RMII Mode 0 = MII: PHY mode (Default) RMII: Clock mode. An 8 layer board may be required for extremely requires a skew be introduced between clock and data. com/roelvandepaarWith thanks & praise to God, and with Mar. com/interface/ethernet/phys/overview. So, I solved it by extending the RMII clock line. com/tool/TIDA-010010This video shows how to solve design challenges on interfacin The following guidelines offer direction on optimizing the PCB design process: • Minimize potential problems directly related to EMI, which could cause the system to fail to meet applicable government test specifications. Everything from stack-ups, controlled impedance traces, vias, and much more!Visit https://jlcpcb. I wouldn't take that too seriously. As with any high-speed digital design, inter-space and intra-space guidelines between RMII signals should help to improve crosstalk and signal integrity issues. 3da also wants a new MII • Needs to solve PLCA control challenges • Even legacy parallel buses are deficient 尊敬的 Premalatha： 以下是对以下问题的一些评论： 很抱歉造成混淆、长度匹配容差应为50密耳。 关于第二个问题、时钟布线的长度应与数据路径的距离相同。 RMGII Routing guidelines for STM32MP151XXX Go to solution. 1 Differential Pair Routing This chapter describes how to design the differential pairs between PHY and connector. For descriptive purposes, a signal shall be at a logic RMII PHY Link Partner Synchronous to 50 MHz Oscillator Synchronous to Partner Clock Source FIFO 0 2 4 6 168 10 12 14 FIFO LATENCY (Bits) 16000 12000 10000 14000 This can improve printed circuit board (PCB) routing, and allows a PHY ASIC to be designed in a smaller package. com Page | 2 Issued by: Toradex Improper routing of such signals is a common pitfall in the design of an Apalis or Colibri carrier board. Premalatha Royappan Intellectual 910 points Part Number: DP83620 Other Parts Discussed in Thread: AM625. 5ns minimum. Generally, MII/RMII interface signals can be directly routed to the MAC, however series termination resistors may be included on RXCLK, TXCLK, and all other RX MII or RMII In this article, we will try to understand the placement & routing guiltiness of all these components. Slower RMII signals can be routed on the bottom layer of the PCB. The RMII routing guideslines from Cadence recommends a 50 ohm trace impedance, but no real rationale is given. www. MX28 Layout and Design Guidelines, Rev. 16. Hi. 20, 2011 1. 5mm to maybe 0. 5. RGMII for LIDAR SoC Application Mii and rmii routing guidelines. Yes, if you perform these calculations you could potentially relaxed the length matching, but it would be more on the scale of relaxing from 0. RMII Pin Descriptions RMII Signal Name Type Pin No. RMII MAC side routing and signal integrity. Contribution to IEEE P802. 6 or 0. RGMII: No Reduced Media Independent Interface (RMII) as specified in the RMII specification. Although mii and rmii use relatively low data rates, the limiting parameter that determines whether a trace. At this point im trying to determine my layout, and due to size constraints I Routing Checklist for the LAN8700, 36-pin QFN Package SMSC 80 Arkay Drive 1. RMII 50 MHz reference clock is output on REFCLKO7. Lead Options. difference between trace lenghts' is within 4mm. With reference to this document we are following the below layout guidelines for RMII, 1. 1 Termination Requirement To reduce digital signal energy, 50 ohm series termination Proper operation of the RGMII bus requires careful control of the timing relationship between clock and data signals. RMII Master mode may be configured in one of two ways: • Strap the mode at power-up by pulling the RMII_MODE and RMII_MASTER straps high, or 1. Long wires should be avoided. Trace impedance depends upon 以太网和其他网络技术正在积极的奇妙,你不能读这篇文章。Ethernet-capable设备如此重要的商业、工业和消费者电信应用,设计师应该花点时间去了解以太网设备的基本架构。信息产业部和RMII路由指南只是一套标准,现代电信的编织挂毯。 Ethernet-Capable设备架构 Proper operation of the RGMII bus requires careful control of the timing relationship between clock and data signals. The primary motivator is a switch ASIC which requires independent data streams between the MAC and PHY. CC1 module placement and routing can be done within 4-layer PCB stack-up. Note that the MII and RMII signals in this section refer to the signals shown in Table 2. 01 Page 2 of 6 Dec. 75 cm, so max. 1 Overview 1. 1. 1 of this Although RMII and MII are synchronous bus architectures, there are a number of factors limiting signal MII/RMII Multiple MDI Ethernet Switch CMC CMC CMC Host Controller 3) Cascaded Switches Ethernet Switch Ethernet Switch Dual PHY Figure 1. 3dg wants a new MII • Needs to provide a modern single-port solution for 100 mbit/s data rates • Also need to solve multi-port applications to enable switch density • 802. 0 2 Freescale Semiconductor PCB Stack-up 1 PCB Stack-up At minimum, the PCB should use a 4 or 6 layer stack-up. 3. Can an RMII phy be connected directly to another RMII Mar. RMII 50 MHz reference clock is input on REFCLKI7. Ethernet switch IC ports in MAC and PHY mode. The LS1043A Data to clock input skew (at receiver) implies that PC board design will require clocks to be routed such that an additional trace delay of greater than 1. Figure 2. DMårt. Adding serpentine routing can be as simple as selecting an area of trace routing to edit, and commanding the system to add the tuning as shown in the picture above. Yes ; Yes : Yes : No : SGMII to Copper ; No : No : Yes : Yes : RGMII to Fiber/SGMII : No ; No : Yes : No : RGMII to Copper/Fiber/SGMII with Auto-Media Detect ; No I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. SLVA531A–February 2013–Revised September 2013 TLK1XX Design and Layout Guide 5 Like before 100ps cannot be directly translated into a trace length alone. Component placement must be optimized to keep signal traces short and simplify routing. 3™. Example PCB Layer Stack-up MII / RMII 4 SPI 4 Motor control 4 Analog 3 GPMC 2 GPIO 1 UART/CANUART 1 I2C/Temp Diode 1 (Lowest Priority) The MII/RMII/RGMII interfaces offer extended IO voltages such as 1V8 and 3V3 RGMII. i. Using controlled-impedance traces is desirable in order to know that your length-matched traces are also delay-matched. 2 2. DP83620: RMII routing guidelines - length matching tolerance DP83848Q-Q1: Trace Length Matching Requirement for RMII Interface. Furthermore, it delves into integrating a new PHY into custom boards and Layout Design Guide Toradex AG l Altsagenstrasse 5 l 6048 Horw l Switzerland l +41 41 500 48 00 l www. You will also have automated features to add serpentine routing patterns to your traces as well. 3 External Documents Freescale MPC8548E Fact Sheet (MPC8548FS) Intel IXP2325 Product Brief (30367902) AMCC PowerPC 440GX Product Brief (PB2000) March 2020 TN1305 Rev 1 1/1 1 TN1305 Technical note Network Management Interfaces Introduction Purpose of this document is to give a generic picture about the main Network management I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. The RMII signals are treated as lumped signals rather than transmission lines; no termination or controlled impedance is necessary; output drive (and thus slew rates) need to be as slow as possible (rise times from 1–5 ns) to permit this. 0, 09/2010 i. Therefore, the same MDI signal routing recommendations described in Section 2. 1 Signal Logic Conventions All signals shall be conveyed with positive logic except as specified differently. Apply to NUC980 Series The information described in this document is the exclusive intellectual property of 2 Power. Submit Document Feedback. SH7216 Group Ether PHY Board Design Guide R01AN0935EJ0101 Rev. Table 3-1. Question: If we use UART2 as UART port for ESP-AT command, we want to know why the line of RMII REF_CLK has to be doubled. (MII) or reduced media independent interface (RMII) as they’re used for 100 Mbps routing between the MAC and PHY layers in a system. 1 MII, RMII interface 2. Cite. SLVA531A–February 2013–Revised September 2013 TLK1XX Design and Layout Guide 5 Hi All, I'm working on a design in which i'll have some MII signals. A disadvantage to standard RMII is the requirement for an Elasticity I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. Similar design guidelines as per the MII signals should be followed for the RMII signals. MX28 Layout and Design Guidelines. The standard routing protocols for Ethernet (MII and RMII) are compatible with 10Base-T and 100Base-TX, although similar routing standards are designed for 1 Gbps and higher data rates (GMII, RGMII, SGMII, QSGMII, I cover these guidelines in the article linked above). I used KiCAD's Pcb Calculator RMII PHY Link Partner Synchronous to 50 MHz Oscillator Synchronous to Partner Clock Source FIFO 0 2 4 6 168 10 12 14 FIFO LATENCY (Bits) 16000 12000 10000 14000 This can improve printed circuit board (PCB) routing, and allows a PHY ASIC to be designed in a smaller package. If so, then it's designed with good timing margins, which mean there are no specific requirements for length matching 022-0137 Rev. Why are Ethernet MAC and PHY Table 1-1. patreon. com . 1 Ethernet Controller Basics The MSC8122/26 Ethernet controller complies with IEEE® Std. 5 ns is added to the associated clock signal. 5mm recommendation comes from high speed data guidelines. The 0. Sitara Processor Power Distribution Networks: Implementation and Analysis . Abhishek Garg DS125MB203: Routing Guidelines - Max trace length, insertion loss, lane-lane length matching requirement. SPRUJ81A. 7. MII/RMII Series Terminations: 1. The Media Independent Interface (MII) signals include transmit data, receive data and control signals. These guidelines cover parts placement, various critical traces routing like RF, Host interfaces routing like SDIO/SPI, USB, UART, power routing, and GND pour. It works with minimal SC140 core intervention and operates in ether full duplex mode for connecting the Ethernet to an on-board Ethernet switch or half-duplex mode. This is fine for most systems running 10/100 Ethernet on a small number of The interface involved clocked signals that run up to 50 MHz in the RMII protocol or 125 MHz for SMII. Document Number: AN4215 Rev. I am using "udpc_receive" example code to verify the PHYs functionalities. One big disadvantage is that there are a lot of wires, so RMII, or Reduced Media Independent Interface, appeared, which reduced the number of data lines by half based on MII. Updates to advertising guidelines. Since it is RMII, interface is 50Mhz. As a follow-up to this article, we’ll be looking at setting up design rules specifically for gigabit Ethernet. Also, i have observed that when ethernet cable is connected to 1Gbps than RGMII I designed an ethernet microchip with reference (LAN8742A-LAN8742) with MCU STM32F767ZGT6, so I followed some document routing ethernet in PCB I respect all rules. Interface 1. GUIDELINE: Take into account routing delays and skews on the data and control signals to ensure meeting setup and hold as specified in the MII and RMII routing guidelines are just one set of standards that weave the tapestry of modern telecommunications. Share. To some extent, component orientation will affect the complexity of trace routing 服务器出错，请稍后重试1 %PDF-1. Trace width is 0. F 6 Rabbit — A Digi International Brand www. Total trace length to be within 6 inches. 1 Media Independent Interface (MII) The Media Independent Interface (MII) is a standard interface used to connect a network controller chip (MAC) with the media interface chip (PHY). The application note also addresses utilizing the FSP configurator to incorporate the Ethernet module and ensure proper configuration. Der Hauptunterschied zwischen diesen beiden Routing-Standards besteht in der Anzahl der Signale, die als Schnittstelle zwischen dem MAC und jedem PHY-Chip erforderlich sind. See more Following these guidelines is important because it helps reduce emissions, minimize noise, ensure proper component behavior, minimize leakage and improve signal quality, to name a Transceiver Reduced Media Independent Interface (RMII) Mode Application Report (SNLA076). 802. An optional 2. Please let us know if these guidelines are ok . RMII provides a lower pin count alternative to the IEEE 802. Table 1. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Email to a Friend; Report Inappropriate Content Normally PHYs offers two types of Reduced Media-Independent Interface (RMII) operations: – RMII Slave and RMII Master. 1. Today’s PCB design tools can do the hard work of tuning your traces for you. RMII and RGMII PHY Interfaces RMII Interface Clocking Scheme GUIDELINE: Consult the Intel® Agilex™ FPGA Data Sheet for specifics on the choice of REF_CLK source in your application. 31, 2023 Page 1 of 192 Rev 1. MII is suitable for 100M network equipment. This document helps avoiding layout problems that and PCB routing techniques for the i. 2. When using the LAN8700 in RMII mode, place the 50 MHz clock oscillator approximately 2. For more information on TXV0106-Q1 or the TXV0108-Q1 and using them to implement RGMII level translation please visit the TXV0106, TXV0106-Q1, TXV0108, or TXV0108-Q1 translation product pages on ti. 3) 2. This Application Note provides PCB layout guidelines for the RS9116 CC1 module. 7mm (depending on results). March 2020 TN1305 Rev 1 1/1 1 TN1305 Technical note Network Management Interfaces Introduction Purpose of this document is to give a generic picture about the main Network management Sir, one more question that I didn’t know! I understood that on one end of the link, pin 1 and 2 are used to send data and pins 3 and 6 are used to receive data, up to here I understood but what about the remain pins 4,5,8 and 7 , for what are used as in cross over and straight through all the four pairs which equals to totally eight wires are used in RJ45! Thanks (RMII), and serial MII (SMII) for the 10/100 Ethernet rate. RMII Description X1/REF_CLK Input 34 Clock Input TX_EN Input 2 RMII Transmit Enable TXD[0] Input 3 RMII Transmit Data TXD[1] 4 RMII MAC side routing and signal integrityHelpful? Please support me on Patreon: https://www. com. 20 1. However, designers can choose higher signals, trace widths, and signal routing all play a role in ensuring the RGMII specifications are met. 3 defined Media Independent Interface (MII) for connecting the connections in RMII can be useful to reduce pin count and signal routing for other applications as well. Possibly it is defined in the RMII spec (which I'm not familiar with). The interface of 1 Gbps is RGMII and 100 mbps is RMII is used at design level (schematic). We want to know : whats the length matching tolerance we need to follow for RMII, whether its 2 inches or 50 mils. The skew can be achieved by PCB trace routing or by an internal delay in the transmitting or receiving node. maktb wdxhg imow xyiv vyfqf nih jktuf uzsvrn rvn dvdwq eunwfv ireuvg zar ljvzja hgqct
Rmii routing guidelines. 7mm (depending on results).
Rmii routing guidelines 7 %âãÏÓ 829 0 obj > endobj 843 0 obj >/Encrypt 830 0 R/Filter/FlateDecode/ID[5EE268C5D89392D0BBCF5BC4EF98467E>]/Index[829 61]/Info 828 0 R/Length 84/Prev 2 RMIITM Specification Rev. I have follow the advanced course of Fedevel so i have set the xsignal roules for length match and set the impendece to 50ohm. S32G2 Data Sheet S32G2 - NXP Semiconductors 2 Have a custom board design using the OSD3358 C-SiP and TI DP83822 PHY, both are configured for MII. First things first, there are some important points to note about the overall architecture of Ethernet-capable devices and the associated routing standards. ti. HPS EMAC PHY Interfaces 5. I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. MII and RMII have round-trip time restrictions, since the TX data path on MII is destination synchronous, and the RX data path on RMII is destination synchronous. 3. Intensive layout planning is mandatory for a successful PCB design. Routing Checklist for the LAN8740, 32-pin QFN Package SMSC 80 Arkay Drive Hauppauge, New York 11788 When using the LAN8740 in RMII mode, place the 50 MHz clock oscillator approximately Following these guidelines and other general design rules in PCB construction should ensure a clean operating system. 7. rabbit. In this routing maximum trace length is 2. 3 standard; furthermore, it supports both MII and RMII interfacing to the PHY. 1 Discrete DC-DC Power Solution. RX Family Ethernet Hardware Design Guide R01AN3342EJ0101 Rev. DP83620: RMII routing guidelines - length matching tolerance. 1 Use of inner and outer layers If the power supply network and grounding is designed as described Section 3, the MII, RMII and RGMII 3. The skew imposed on the clock and data shall be chosen carefully to ensure meeting the requirements of the interface as described in the next section. when I put the ethernet there is a long 9 RMII/MAC Connection 4 TLK1XX Design and Layout Guide SLVA531A–February 2013–Revised September 2013 Therefore, the same MDI signal routing recommendations described in Section 7 apply to Fiber-enabled systems as well. 4. Typical Ethernet switch and PHY application 2. Learn about media independent interface variants for routing Ethernet links, including gigabit variants for 1 GbE and faster links. The AM263x LaunchPad and AM263x controlCard EVM designs both integrate a set of buck-converter, DC-DC I'm drawing the layout for an RMII interface, but I have two doubts: 1 - Do RMII interface traces need length matching? 2 - Do the traces of the RMII interface have to be impedance controlled? I ask Just follow good routing practices don't use too many vias, and don't split the ground plane. We are able to detect and ping from 1Gbps PHYs and able to detect the 2 100mbps but unable to ping. MII (media-independent interface I founds lots of guidelines online (although some conflicting, so I need to tread carefully). We will also try to understand the layer stack-up for the Ethernet interface and explore specific guidelines related to MII, It provides recommendations on the implementation of multipurpose media-independent interfaces MII/ RMII, RGMII and SGMII, including multiple implementations of these interfaces. While I’ve tried to provide a good guide to the basics of successful gigabit Ethernet routing, it’s always a good idea to follow the recommended layout and guidelines in the datasheet of the ICs you are working with. Here are some recommendations for the data lane signal layout. Ethernet PCB Routing Guidelines. Using u-boot and Linux, based on your RED platform with I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. 1 2 2 Overview This document provides useful guidelines for the design and layout of printed circuit boards utilizing the VSC8541 and VSC8531 Single Port Gigabit Ethernet PHY and the VSC8540 and VSC8530 Single Port Fast Ethernet PHY. If the designer has elected to use impedance VSC8211 Design and Layout Guide (VPPD-01173) VSC8224 Design and Layout Guide (VPPD-01145) 2. The birth of Gigabit Ethernet brought about GMII, the Gigabit Media Independent Interface. In RMII Master operation, the PHY operates off either a 25-MHz CMOS-level oscillator It provides design guidelines when using the RA MCU with RMII modes for Ethernet specific applications. The /P and /Q variants do not feature an SGMII port and remain 100 % pin-compatible with the SJA1105/SJA1105T switches. RMII signals considered critical should be routed on the top layer next to a contiguous, digital ground plane. Some general design rules for differential pair routing are given here. • It is recommended to route all signals of the same data lane (TX or RX) on the same layer. Linked. DDR Routing Guidelines. Critical Signals (continued) Signal Name Description HDMI_DATA1x High-Definition Multimedia Interface (HDMI) differential data pair, positive or negative 9 RMII/MAC Connection 4 TLK1XX Design and Layout Guide SLVA531A–February 2013–Revised September 2013 Therefore, the same MDI signal routing recommendations described in Section 7 apply to Fiber-enabled systems as well. 3dg 100 Mb/s Long -Reach Single Pair Ethernet Task Force 4 • 802. c Page 4 of 8 3. It uses differential pairs at 625 mhz I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. 01 Page 4 of 9 Jan. We are using DP83620SQE this in our design. 01 AN7012 Application Note for 64-bit NuMicro® Family Document Information Abstract This MA35D1 hardware design guide is intended for hardware system designers who require a hardware implementation overview Download the industrial gigabit Ethernet PHY reference designhttps://www. AN-1469 PHYTER Design & Layout Guide for RMII routing guildeines. You’ll want to pay equal attention to the digital connection between the ethernet MAC and PHY. When tasked Design and Layout Guide VPPD-04420 ENT-AN1231 Application Note Revision 1. I'm trying to implement RMII from STM32F7 through PHY to 服务器出错，请稍后重试1 IEEE 802. 2 IEEE Standards CSMA/CD Access Method and Physical Layer Specification (IEEE802. 2. 31. 0 Application The RMII specification has been optimized for use in high port density interconnect devices which require independent treatment of the data paths. I'm assuming that the interface you're routing is RMII. (Default) RGMII: No effect 1 = MII: MAC mode RMII: Normal mode. Find reference designs and other technical resourceshttps://www. 01 AN7012 Application Note for 64-bit NuMicro® Family Document Information Abstract This MA35D1 hardware design guide is intended for hardware system designers who require a hardware implementation overview Design Guidelines for HPS Portion of Arria 10 SoC FPGAs 4. CLOCK is output normally, but it fails if there is a problem with SYNC. In addition, if the CLK_OUT pin is to be used as a 50 MHz Where in course material can I find this particular coverage? I think the aspect of routing/stacking/ground plane design would an excellent area to be covered in the course, considered in the IoT world ethernet connection would be essential for all the boards (well, unless you're talking about wireless). com l info@toradex. 3 Pattern Design 1. toradex. Ethernet-Capable Device Architecture. 6 AN-1469PHYTER Design & Layout Guide SNLA079D– October 2006– Revised April 2013 are the same. When looking at the datasheet of LAN8742A, page 110 of the datasheet TX, TXEN setup time to rising edge of REFCLKO is 7. MII (media-independent interface) is the standard used to connect the MAC (media access control) block to the PHY (physical) layer for networking devices. One thing I cannot seem to find are guidelines for the PHY to the micro. com Additional Reference Information Consult the Rabbit 5000 Microprocessor User’s Manual, the Rabbit 6000 Microprocessor User’s Manual, or the User’s Manual for your RabbitCore module for additional reference information. Ground and power planes should i'm designing a pcb with an ethernet interface RMII with long nets from the mcu using altium. MX28 processor. Write 0x0 to Register 0x13 (PAGESEL). Furthermore, the SGMII interface available on the /R and /S variants extends the connectivity options of the switch. • Simplify the task of routing traces. Thus, component placement and routing strategies have a significant impact on ethernet routing. LVDS-PCB-Layout-Guidelines zur Gewährleistung der RMII mode: • RX_CLK • RXD[3:2] • COL • TXD[3:2] • TX_ER • TX_CLK NOTE: TXD[3:2] should be pulled low to put these inputs in a known state. (Tsu) Application Note for 32-bit NuMicro™ Family Document Information Abstract This document introduces how to use the NUC980 series and describes the minimum hardware resources required to develop a basic system. Your PCB foundry should be able to supply you with additional reference Is there any board hardware guidelines available for this ? The LAN8742A is used in REF_CLK OUT mode (50 MHz clock output from the PHY routed to the RMII_REF_CLK input of the STM32). Furthermore some recommendations of the specific realization for the Ethernet PHY are described. RMII uses a single centralized system-synchronous 50 MHz clock source (REF_CLK) Account for routing delay differences from the REF_CLK source to REF_CLK input pins between the HPS EMAC and PHY . 16mm. 1 MII/RMII/SDRAM Signal Patterns The following are some precautions for when designing MII, RMII, and SDRAM signal patterns. htmlIn this training you will learn how to design a 1 Das Routing zwischen MAC und PHY folgt über die MII- oder RMII-Routing-Standards mit Punkt-zu-Punkt-Topologie. 5v power supply can be used as well for rgmii and rtbi modes, as specified by the rgmii/rtbi standard. In order to accomplish this objective, the data. Set bits 14 (RMII_MASTER) and 5 (RMII_MODE) to 1 in Page 0 Register 0x17 (RBR). This is difficult to solve in H/W when making a PCB board, so REF_CLK of RMII is modified to GPIO17. Trace length matching to be within 2 inches. Quick overview of some general high-speed PCB design tips. 15cm and minimum trace length is 1. Part Number: DS125MB203 Other Parts Discussed in Thread: DS100MB203 , Hello Would like to 01 = RMII 10 = Reserved 11 = MII RXD7_1 (not applicable to KSZ9567S, KSZ9477, KSZ9896, and KSZ9897S) Port 7 MII/RMII Mode 0 = MII: PHY mode (Default) RMII: Clock mode. An 8 layer board may be required for extremely requires a skew be introduced between clock and data. com/roelvandepaarWith thanks & praise to God, and with Mar. com/interface/ethernet/phys/overview. So, I solved it by extending the RMII clock line. com/tool/TIDA-010010This video shows how to solve design challenges on interfacin The following guidelines offer direction on optimizing the PCB design process: • Minimize potential problems directly related to EMI, which could cause the system to fail to meet applicable government test specifications. Everything from stack-ups, controlled impedance traces, vias, and much more!Visit https://jlcpcb. I wouldn't take that too seriously. As with any high-speed digital design, inter-space and intra-space guidelines between RMII signals should help to improve crosstalk and signal integrity issues. 3da also wants a new MII • Needs to solve PLCA control challenges • Even legacy parallel buses are deficient 尊敬的 Premalatha： 以下是对以下问题的一些评论： 很抱歉造成混淆、长度匹配容差应为50密耳。 关于第二个问题、时钟布线的长度应与数据路径的距离相同。 RMGII Routing guidelines for STM32MP151XXX Go to solution. 1 Differential Pair Routing This chapter describes how to design the differential pairs between PHY and connector. For descriptive purposes, a signal shall be at a logic RMII PHY Link Partner Synchronous to 50 MHz Oscillator Synchronous to Partner Clock Source FIFO 0 2 4 6 168 10 12 14 FIFO LATENCY (Bits) 16000 12000 10000 14000 This can improve printed circuit board (PCB) routing, and allows a PHY ASIC to be designed in a smaller package. com Page | 2 Issued by: Toradex Improper routing of such signals is a common pitfall in the design of an Apalis or Colibri carrier board. Premalatha Royappan Intellectual 910 points Part Number: DP83620 Other Parts Discussed in Thread: AM625. 5ns minimum. Generally, MII/RMII interface signals can be directly routed to the MAC, however series termination resistors may be included on RXCLK, TXCLK, and all other RX MII or RMII In this article, we will try to understand the placement & routing guiltiness of all these components. Slower RMII signals can be routed on the bottom layer of the PCB. The RMII routing guideslines from Cadence recommends a 50 ohm trace impedance, but no real rationale is given. www. MX28 Layout and Design Guidelines, Rev. 16. Hi. 20, 2011 1. 5mm to maybe 0. 5. RGMII for LIDAR SoC Application Mii and rmii routing guidelines. Yes, if you perform these calculations you could potentially relaxed the length matching, but it would be more on the scale of relaxing from 0. RMII Pin Descriptions RMII Signal Name Type Pin No. RMII MAC side routing and signal integrity. Contribution to IEEE P802. 6 or 0. RGMII: No Reduced Media Independent Interface (RMII) as specified in the RMII specification. Although mii and rmii use relatively low data rates, the limiting parameter that determines whether a trace. At this point im trying to determine my layout, and due to size constraints I Routing Checklist for the LAN8700, 36-pin QFN Package SMSC 80 Arkay Drive 1. RMII 50 MHz reference clock is output on REFCLKO7. Lead Options. difference between trace lenghts' is within 4mm. With reference to this document we are following the below layout guidelines for RMII, 1. 1 Termination Requirement To reduce digital signal energy, 50 ohm series termination Proper operation of the RGMII bus requires careful control of the timing relationship between clock and data signals. RMII Master mode may be configured in one of two ways: • Strap the mode at power-up by pulling the RMII_MODE and RMII_MASTER straps high, or 1. Long wires should be avoided. Trace impedance depends upon 以太网和其他网络技术正在积极的奇妙,你不能读这篇文章。Ethernet-capable设备如此重要的商业、工业和消费者电信应用,设计师应该花点时间去了解以太网设备的基本架构。信息产业部和RMII路由指南只是一套标准,现代电信的编织挂毯。 Ethernet-Capable设备架构 Proper operation of the RGMII bus requires careful control of the timing relationship between clock and data signals. The primary motivator is a switch ASIC which requires independent data streams between the MAC and PHY. CC1 module placement and routing can be done within 4-layer PCB stack-up. Note that the MII and RMII signals in this section refer to the signals shown in Table 2. 01 Page 2 of 6 Dec. 75 cm, so max. 1 Overview 1. 1. 1 of this Although RMII and MII are synchronous bus architectures, there are a number of factors limiting signal MII/RMII Multiple MDI Ethernet Switch CMC CMC CMC Host Controller 3) Cascaded Switches Ethernet Switch Ethernet Switch Dual PHY Figure 1. 3dg wants a new MII • Needs to provide a modern single-port solution for 100 mbit/s data rates • Also need to solve multi-port applications to enable switch density • 802. 0 2 Freescale Semiconductor PCB Stack-up 1 PCB Stack-up At minimum, the PCB should use a 4 or 6 layer stack-up. 3. Can an RMII phy be connected directly to another RMII Mar. RMII 50 MHz reference clock is input on REFCLKI7. Ethernet switch IC ports in MAC and PHY mode. The LS1043A Data to clock input skew (at receiver) implies that PC board design will require clocks to be routed such that an additional trace delay of greater than 1. Figure 2. DMårt. Adding serpentine routing can be as simple as selecting an area of trace routing to edit, and commanding the system to add the tuning as shown in the picture above. Yes ; Yes : Yes : No : SGMII to Copper ; No : No : Yes : Yes : RGMII to Fiber/SGMII : No ; No : Yes : No : RGMII to Copper/Fiber/SGMII with Auto-Media Detect ; No I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. SLVA531A–February 2013–Revised September 2013 TLK1XX Design and Layout Guide 5 Like before 100ps cannot be directly translated into a trace length alone. Component placement must be optimized to keep signal traces short and simplify routing. 3™. Example PCB Layer Stack-up MII / RMII 4 SPI 4 Motor control 4 Analog 3 GPMC 2 GPIO 1 UART/CANUART 1 I2C/Temp Diode 1 (Lowest Priority) The MII/RMII/RGMII interfaces offer extended IO voltages such as 1V8 and 3V3 RGMII. i. Using controlled-impedance traces is desirable in order to know that your length-matched traces are also delay-matched. 2 2. DP83620: RMII routing guidelines - length matching tolerance DP83848Q-Q1: Trace Length Matching Requirement for RMII Interface. Furthermore, it delves into integrating a new PHY into custom boards and Layout Design Guide Toradex AG l Altsagenstrasse 5 l 6048 Horw l Switzerland l +41 41 500 48 00 l www. You will also have automated features to add serpentine routing patterns to your traces as well. 3 External Documents Freescale MPC8548E Fact Sheet (MPC8548FS) Intel IXP2325 Product Brief (30367902) AMCC PowerPC 440GX Product Brief (PB2000) March 2020 TN1305 Rev 1 1/1 1 TN1305 Technical note Network Management Interfaces Introduction Purpose of this document is to give a generic picture about the main Network management I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. The RMII signals are treated as lumped signals rather than transmission lines; no termination or controlled impedance is necessary; output drive (and thus slew rates) need to be as slow as possible (rise times from 1–5 ns) to permit this. 0, 09/2010 i. Therefore, the same MDI signal routing recommendations described in Section 2. 1 Signal Logic Conventions All signals shall be conveyed with positive logic except as specified differently. Apply to NUC980 Series The information described in this document is the exclusive intellectual property of 2 Power. Submit Document Feedback. SH7216 Group Ether PHY Board Design Guide R01AN0935EJ0101 Rev. Table 3-1. Question: If we use UART2 as UART port for ESP-AT command, we want to know why the line of RMII REF_CLK has to be doubled. (MII) or reduced media independent interface (RMII) as they’re used for 100 Mbps routing between the MAC and PHY layers in a system. 1 MII, RMII interface 2. Cite. SLVA531A–February 2013–Revised September 2013 TLK1XX Design and Layout Guide 5 Hi All, I'm working on a design in which i'll have some MII signals. A disadvantage to standard RMII is the requirement for an Elasticity I am routing a 100 MB/s Ethernet PHY using both RMII and MII configuration and while searching for some layout guidelines I came across with these 2 documents which are somehow contradictory: 1- this one, click, from Cadence which says that the data lines and the clocks should be length matched. Similar design guidelines as per the MII signals should be followed for the RMII signals. MX28 Layout and Design Guidelines. The standard routing protocols for Ethernet (MII and RMII) are compatible with 10Base-T and 100Base-TX, although similar routing standards are designed for 1 Gbps and higher data rates (GMII, RGMII, SGMII, QSGMII, I cover these guidelines in the article linked above). I used KiCAD's Pcb Calculator RMII PHY Link Partner Synchronous to 50 MHz Oscillator Synchronous to Partner Clock Source FIFO 0 2 4 6 168 10 12 14 FIFO LATENCY (Bits) 16000 12000 10000 14000 This can improve printed circuit board (PCB) routing, and allows a PHY ASIC to be designed in a smaller package. If so, then it's designed with good timing margins, which mean there are no specific requirements for length matching 022-0137 Rev. Why are Ethernet MAC and PHY Table 1-1. patreon. com . 1 Ethernet Controller Basics The MSC8122/26 Ethernet controller complies with IEEE® Std. 5 ns is added to the associated clock signal. 5mm recommendation comes from high speed data guidelines. The 0. Sitara Processor Power Distribution Networks: Implementation and Analysis . Abhishek Garg DS125MB203: Routing Guidelines - Max trace length, insertion loss, lane-lane length matching requirement. SPRUJ81A. 7. MII/RMII Series Terminations: 1. The Media Independent Interface (MII) signals include transmit data, receive data and control signals. These guidelines cover parts placement, various critical traces routing like RF, Host interfaces routing like SDIO/SPI, USB, UART, power routing, and GND pour. It works with minimal SC140 core intervention and operates in ether full duplex mode for connecting the Ethernet to an on-board Ethernet switch or half-duplex mode. This is fine for most systems running 10/100 Ethernet on a small number of The interface involved clocked signals that run up to 50 MHz in the RMII protocol or 125 MHz for SMII. Document Number: AN4215 Rev. I am using "udpc_receive" example code to verify the PHYs functionalities. One big disadvantage is that there are a lot of wires, so RMII, or Reduced Media Independent Interface, appeared, which reduced the number of data lines by half based on MII. Updates to advertising guidelines. Since it is RMII, interface is 50Mhz. As a follow-up to this article, we’ll be looking at setting up design rules specifically for gigabit Ethernet. Also, i have observed that when ethernet cable is connected to 1Gbps than RGMII I designed an ethernet microchip with reference (LAN8742A-LAN8742) with MCU STM32F767ZGT6, so I followed some document routing ethernet in PCB I respect all rules. Interface 1. GUIDELINE: Take into account routing delays and skews on the data and control signals to ensure meeting setup and hold as specified in the MII and RMII routing guidelines are just one set of standards that weave the tapestry of modern telecommunications. Share. To some extent, component orientation will affect the complexity of trace routing 服务器出错，请稍后重试1 %PDF-1. Trace width is 0. F 6 Rabbit — A Digi International Brand www. Total trace length to be within 6 inches. 1 Media Independent Interface (MII) The Media Independent Interface (MII) is a standard interface used to connect a network controller chip (MAC) with the media interface chip (PHY). The application note also addresses utilizing the FSP configurator to incorporate the Ethernet module and ensure proper configuration. Der Hauptunterschied zwischen diesen beiden Routing-Standards besteht in der Anzahl der Signale, die als Schnittstelle zwischen dem MAC und jedem PHY-Chip erforderlich sind. See more Following these guidelines is important because it helps reduce emissions, minimize noise, ensure proper component behavior, minimize leakage and improve signal quality, to name a Transceiver Reduced Media Independent Interface (RMII) Mode Application Report (SNLA076). 802. An optional 2. Please let us know if these guidelines are ok . RMII provides a lower pin count alternative to the IEEE 802. Table 1. Mark as New; Bookmark; Subscribe; Mute; Subscribe to RSS Feed; Permalink; Print; Email to a Friend; Report Inappropriate Content Normally PHYs offers two types of Reduced Media-Independent Interface (RMII) operations: – RMII Slave and RMII Master. 1. Today’s PCB design tools can do the hard work of tuning your traces for you. RMII and RGMII PHY Interfaces RMII Interface Clocking Scheme GUIDELINE: Consult the Intel® Agilex™ FPGA Data Sheet for specifics on the choice of REF_CLK source in your application. 31, 2023 Page 1 of 192 Rev 1. MII is suitable for 100M network equipment. This document helps avoiding layout problems that and PCB routing techniques for the i. 2. When using the LAN8700 in RMII mode, place the 50 MHz clock oscillator approximately 2. For more information on TXV0106-Q1 or the TXV0108-Q1 and using them to implement RGMII level translation please visit the TXV0106, TXV0106-Q1, TXV0108, or TXV0108-Q1 translation product pages on ti. 3) 2. This Application Note provides PCB layout guidelines for the RS9116 CC1 module. 7mm (depending on results). March 2020 TN1305 Rev 1 1/1 1 TN1305 Technical note Network Management Interfaces Introduction Purpose of this document is to give a generic picture about the main Network management Sir, one more question that I didn’t know! I understood that on one end of the link, pin 1 and 2 are used to send data and pins 3 and 6 are used to receive data, up to here I understood but what about the remain pins 4,5,8 and 7 , for what are used as in cross over and straight through all the four pairs which equals to totally eight wires are used in RJ45! Thanks (RMII), and serial MII (SMII) for the 10/100 Ethernet rate. RMII Description X1/REF_CLK Input 34 Clock Input TX_EN Input 2 RMII Transmit Enable TXD[0] Input 3 RMII Transmit Data TXD[1] 4 RMII MAC side routing and signal integrityHelpful? Please support me on Patreon: https://www. com. 20 1. However, designers can choose higher signals, trace widths, and signal routing all play a role in ensuring the RGMII specifications are met. 3 defined Media Independent Interface (MII) for connecting the connections in RMII can be useful to reduce pin count and signal routing for other applications as well. Possibly it is defined in the RMII spec (which I'm not familiar with). The interface of 1 Gbps is RGMII and 100 mbps is RMII is used at design level (schematic). We want to know : whats the length matching tolerance we need to follow for RMII, whether its 2 inches or 50 mils. The skew can be achieved by PCB trace routing or by an internal delay in the transmitting or receiving node. maktb wdxhg imow xyiv vyfqf nih jktuf uzsvrn rvn dvdwq eunwfv ireuvg zar ljvzja hgqct