For example, if you need to design a pcie card, you dont have to create it from scratch. Where altium users and enthusiasts can interact with each other. Now you can use trace length report generators and realtime trace length reporting, while you are routing, to find the exact trace length. Fedevel development we specialize in advanced digital hardware development with a focus on motherboard, processor and microcontroller board design including power supplies, digital analog. In this altium designer 17 advanced pcb training course module, you will learn. By downloading and using these sunstone specific rule sets you can have. If the length of the conductor is a certain ratio or multiple of the. Signal routing and length tuning simple pointtopoint net length control. Jul 08, 2014 length matching in altium robertferanec altium, hardware design july 8, 2014 this video explains how to setup a length matching rule and do interactive length tuning in altium designer.
Your length matching settings and meander geometry should be easily accessed directly from the layout. Grafic display with pic24 and ks0108 controller and touch. Matching trace lengths within a predefined tolerance interval is easy when you work with the best autointeractive routing tools. With altium designer, design complex boards and instantly see the board. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files. This video explains how to setup a length matching rule and do interactive length tuning in altium designer. Contractworks makes executing, storing, and tracking corporate agreements easier. Pcb layout is a highlevel engineering tool for board design featuring smart manual routing of highspeed and differential signals, shapebased autorouter, advanced verification, and wide importexport. Highspeed digital board design with altium designer. Many times a signal integrity engineer uses words like as small as possible to describe the difference in length of matching group signal.
We use the same solver from simberian to calculate the trace delay and allow the user to enter pin package delay and via delay in the objects properties. Pcb length matching implementation signal integrity. If the chips themselves are able to do the deskewing, of course you should use that feature rather than extend the traces to do length matching. Discover features you didnt know existed and get the most out of those you already know about. This video explains one of possible pcb layout techniques used for ddr2 ddr3 length matching in altium designer. Trace tuning for routing length matching by altium audio bites from desktop or your mobile device.
Considering the tight timing requirements at gig speeds, the signal from one side of. Download all the example files associated with this training here. Fedevel development we specialize in advanced digital hardware development with a focus on motherboard, processor and microcontroller board design including power supplies, digital analog interfaces firmware and software development. A user can create several templates representing common projects and then initialise new layouts from template to preload all of the configured information. Mastering the matching of the lines xsignals and length tuning. Interactive tuning gives you the ability to automatically add a tuning. Trace lengths in gen 1 and gen 2 both allow rx and tx signal traces to reach up to 21 inches in length, while gen 3 only allows trace lengths up to 14 inches on these signal traces. The first rule defines the pairtopair length matching requirements, and has the constraint set to group matched lengths. Introduction on the whole design process from schematic to pcb design based on altium designer, through which you can learn about the basic applications of altium designer based on which youll well.
A switching power supply design is used as an example to demonstrate the whole process of designing a board. Adding a miter for length tuning should be as easy as dragging the mouse across the mismatched trace. Altium pads desktop pcb design blogs mentor graphics. The length matching tool allows the user to route and edit copper traces according to required length and tolerance values that are recalculated in real time. Learn more about the high speed design tools in altium designer. Sep 19, 2019 in this altium designer 17 advanced pcb training course module, you will learn.
Tuning and matching route lengths is also an essential ingredient of differential pair routing. The length rule is used to ensure that the overall routed length is within the specified range. Jul 08, 2014 this video explains how to setup a length matching rule and do interactive length tuning in altium designer. The celestial altium library is a massive, free, open source database library for altium designer created by altium industry expert mark harris. Both rules used for net length matching high speed length and high speed matched lengths can now also be used to adjust delays. How to use the length design rule class to specify lengths for nets and net classes. I have provided a continuous pulse stimulus of 1volt and managed to obtain an overshoot of less than 10% as indicated by altium drc tool. There are 2 types of length matching available today to reduce that which is historically a very time consuming and tedious task. Altium circuitmaker free pcb design tool for opensource. The second rule is to ensure the nets within each differential pair are within tolerance, and has the constraint set to within differential pair length.
Measurement tools online documentation for altium products. No matter the application for your next circuit board, your design software plays a critical role in ensuring your board has the right trace geometry throughout the board. Download a free trial to find out which altium software best suits your needs. Download the excel spreadsheet used in the video here. Altium has a lot of free templates for different form factors. This does not help either the automation software of the pcb design professional to successfully implement the constraint. Pcb length matching implementation signal integrity tutorials. Online drc, batch drc, the equalize net lengths feature, interactive length tuning. Considering the tight timing requirements at gig speeds, the signal from one side of the diff pair does not have to be delayed by much compared to the other side for an incorrectmissed symbol to happen. Pcb layout for the ethernet phy interface introduction this technical note provides reference design information to allow you to design your own pcb with an ethernet connection. Altium designer november 22, 2017 the first time i heard someone talking about tuning their highspeed pcb design, the memory of my middle. Altium differential pair and tuning length routing. Altium offers a limitedtime free trial of its software. Question about trace length matching patterns for high speed.
For many designs, an important aspect of routing the pcb is knowing the net length. Altium how to set and use layer type very useful in. Click the button below to download the latest altium designer installer. Length matching in altium robertferanec altium, hardware design july 8, 2014 this video explains how to setup a length matching rule and do interactive length tuning in altium designer. Altium designer ddr2 ddr3 length matching welldone blog. Altium kindly issued a trial license to me for the viewer but i cannot figure out how to download. Learn more about trace length matching with interactive routing in altium designer. After this course, you will know how to design your own boards in altium designer. The proteus layout module includes a comprehensive scheme for design reuse in the form of board templates and technology data. For differential pair interactive length tuning to work properly, there are a few preconditions that must be true before you can do that. These dimensions are used to minimize any impedance discontinuities along the length of the trace. With a little bit of added work upfront creating new rules for length matching via additional classes. When this constraint option is used, the software will detect all.
Down load all the info on the arm you are using, you should find info on routing rules for the ddr bus. Altium differential pair and tuning length routing my. How to use the length design rule class to specify lengths for. Length tuning and matching altium designer 17 advanced. It is a more comprehensive document on high speed design in altium. Pcie layout and routing guidelines blog altium designer. Mainly because, 1, youre actually doing the length matching, and 2, youre using arcs. So if the maximum length specified by the length rule is shorter than the longest length targeted by the match length rule, then the length rule wins and its length is used during tuning. How to use the interactive length tuning during pcb editing to add.
Location india posts 77 helped points 2,008 level 10. You can follow all the steps based on the video, repeat them and then design your own boards. Altium techdocs are online documentation for altium products, providing the basic information you need to get the most out of our tools. Different types of trace tuning for trace length matching in pcb design. Dec 26, 2011 this video explains one of possible pcb layout techniques used for ddr2 ddr3 length matching in altium designer. A couple of times, the lengthtune smart union seems to have crashed when i tried to drag it across areas where it could not fit a route. This does not help either the automation software of the pcb design. The routing tools in your pcb design software are also critical for ensuring your traces have the right clearances, length matching, and bends. Altium designer also offers plenty of addons that will help you take your designs to the next level. After altium rejected this attempted move, it would not allow me to move or change the shape to legitimate places, basically locking the route. A colleague and i had a discussion and a disagreement about the different ways high speed signals can be lengthmatched. Hyperlynx design rule checking starter editions mentor.
Pcb layout considerations for length tolerance matching. Whether youre working with multiple signal nets that require tuning across a number of signals, or you just need to length match two ends of a differential pair, youll need to use some method for length tuning. Aug 23, 2018 altium techdocs are online documentation for altium products, providing the basic information you need to get the most out of our tools. Altium designer makes trace length tolerance matching and impedance controlled design easy by giving you the best high speed design tools in a single package. But given that length matching is required, it looks like everything youre doing is done as well as it can be. So if you have any doubts which package is right for you, then i highly recommend that you download and test their free versions first. Now you can download a free trial of altium designer and learn more about the industrys best layout, simulation, and production planning tools.
I managed also to use altium signal integrity tool through drc to check for impedance matching, overshoot and undershoot. This video explains how to setup a length matching rule and do interactive length. Altium how to set and use layer type very useful in libraries. Differential pair length matching for gige100m ethernet. A guideline from schematic to pcb design based on altium. Altium uses a unified interface that makes routing.
The database is hosted on a dedicated cloud platform built for the library, to ensure you always have the latest components. Submit ideas and vote for new features you want in altium tools. Hi speeddesigntutorialforaltiumdesigner slideshare. Length tuning in altium just got better hardware, software. Question about trace length matching patterns for high.
Diptrace is a robust, powerful program that helps you easily design even the most. Nine dot connects is no stranger to complex highspeed designs with very tight timing constraints. The length rule now respects the xsignal type queries listed above. I have provided a continuous pulse stimulus of 1volt and managed to. Diptrace team invites you to download the latest beta version of our popular pcb cad program and test all the new features that we have developed for you.
You can also use trace length rule constraints and automated tuning functions to help you. It generally will tell you how close to keep the lengths and may have special requirements. Tbranches, daisychain flyby routing, and serial terminations. Work with the best high speed design features in altium designer. Showcasing the proper use of altium designer tool features length tuning and xsignals. Browse the vast library of free altium design content including components, templates and reference designs. The focus should be on preserving the timing, match the lengths close enough. This rule is typically used to ensure that the target nets are no longer than the specified length, for exampe to. This rule is typically used to ensure that the target nets are no longer than the specified length, for exampe to ensure that the circuit timing requirements will be met. Manage pcb trace lengths for optimal system timing altium. The interactive length tuning and interactive differential pair length tuning commands launched from the route menu provide a dynamic means of optimizing and controlling net or differential pair lengths. Interactive tuning gives you the ability to automatically add a tuning feature and then adjust as needed to provide the proper length via realtime feedback.
Now you can download a free trial of altium and learn more about the layout. I wanted to see the length of the trace for length matching. The interactive length tuning and interactive differential pair length tuning commands launched from the route menu provide a dynamic means of optimizing and controlling net or differential pair lengths by allowing variable amplitude wave patterns accordions to be inserted according to the available space, rules, and obstacles in your design. In altium designer we could have if the fromto length meets to speed up the tuning on buses, we should really see same segment from. In all three of the above methods, you should be careful not to place each section of a serpentine length matching section too close together. We spend countless hours researching various file formats and software that. H 3 2 antenna basics an antenna is basically a conductor exposed in space. Our blog about things that interest us and hopefully you too. A user can create several templates representing common projects.
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