As the power-up default, the KSZ8081RNA uses a 25MHz crystal to generate all required clocks, including the 50MHz RMII … RMII (R. educed . The objective of this design example is to showcase the way to constraint the TSE_RGMII. I’ve opted to break out the option pins to a header that can be used to choose the value of each one.Note that the default address of zero is also the broadcast address for PHYs so if you have multiple PHYs attached to your controller then they’d all respond to this address.The wake-on-lan options are special feature of the KSZ8091.

These two portions of an overall Ethernet networking device perform different functions within the OSI (open systems interconnect) model. Work with the best tools to verify adequately.Working remotely has its challenges.The challenges are doubled for the manager of a remote CAD team.Unfinished business that was started in the 60s calls on us to revisit the terminology used in the design world.EMI is a complex problem. The MII interface is not supported on this device. You can only move the TX pins up from port B to port G, and then only if you’re using at least the 144 pin package. Nonetheless, it’s a welcome option because port B is a crowded place and there’s comparatively little up there in port G. Incidentally, The RXER, LED0, LED1 and INTRP pins are not required in order to get the board working and so they are left unconnected. Not too bad at all actually, and a lot better than I thought it would be. In Ethernet, the number of signals required for the PHY to communicate with the MAC is quite large under the MII standard, thus the RMII standard was developed to reduce the number of signals.Each PHY controls a single physical interface, thus PCBs for devices like network switches contain many traces to provide communication between the PHY and MAC. Here’s how to model and extract coupling capacitance.Converting capacitance to impedance is a necessary requirement for accurate AC circuit analysis.Sustainable electronics materials have the potential to revolutionize the way we approach modern electronics design and is a current hotbed of research.This article is about what EMC circuit performance is, why it is important to your PCB design, along with some useful EMI control tips for your next project.The understanding of equivalent noise bandwidth and all noise that affects a signal aids in receiver sensitivity predictions.Circuit board viewer tools can help your design department by involving everyone virtually and reducing the amount of paperwork.A load or load impedance is the concept of connecting a device or component to the output of a functional block.The use of a figure of merit in electronic systems, as we explain in this blog, can help you improve the cost-effectiveness of your PCBA development.Eco-friendly electronic product design is about learning from our current environmental crisis and employing various Design for Environment standards.Convolution in the frequency domain can be complex (literally), but a set of simulation data can be used to calculate this easily.Schmitt triggers are easy to design and simulate with the right design tools.

Each portion of the system performed the following functions:PHY: An IC that converts digital data from the MAC and sends it along the physical networking interface as an analog signal.

RMII is a reduced pin-count interface that multiplexes some of the control and clock signals and halves the bus width to 2-bits at the expense of doubling the clock speed to 50MHz. because the KSZ8863 is a switch and always needs 100M at the RMII to work, one can replace the speed selection in Line 440: /* Configure the MAC with the speed fixed by the auto-negotiation process */ if ((phyreg & PHY_SPEED_STATUS) == PHY_SPEED_STATUS) {/* Set Ethernet speed to 10M following the auto-negotiation */ (heth-> Init). One of the burdens of MII is that it requires rather a lot of pins to implement. But before I sign off let’s take a look at one more essential topic.No project that features on-board frequencies above a few tens of megahertz is complete without an analysis of signal integrity. 17 . With Ethernet-capable devices being so important in commercial, industrial, and consumer telecom applications, designers should take time to understand the basic architecture of Ethernet devices. First things first, there are some important points to note about the overall architecture of Ethernet-capable devices and the associated routing standards.

The advantage to us is that we can connect an RMII PHY to … Converting Capacitance to Impedance and the Relationship Between the TwoSustainable Electronics Materials: The Future of Electronics DesignKeeping EMC Controlled to Optimize Circuit PerformanceEquivalent Noise Bandwidth, Its Applications, and How Is It Calculated?How Using a Circuit Board Viewer Will Increase Your Design Group’s EfficiencyThe Use of Load Impedance in Circuits and its Effects on Circuit FunctionalityUsing Figure of Merit in Electronic Systems for PCBA Cost-Benefit AnalysisConvolution in the Frequency Domain and Time Domain from Simulation DataMaximize PCB Project Management with Cloud-Based ToolsAddressing Electromigration and IR Drop Within VLSI Interconnect Downscaling Managing a Distributed Team of PCB Designers - Remote ControlCleaning up Our Electronics Design Language: Words MatterTaming Electromagnetic Interference on Your PCB - What’s All This Noise?Calculating PCB Circuit Density to Estimate Layer-Count and Required TechnologyWhat is Multiphysics and How Does it Relate to PCB Design?Translating Logical System Design into a PCB Layout

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