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. Altium how to set and use layer type very useful in libraries. Jul 08, 2014 this video explains how to setup a length matching rule and do interactive length tuning in altium designer. 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. After altium rejected this attempted move, it would not allow me to move or change the shape to legitimate places, basically locking the route. This does not help either the automation software of the pcb design. 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.
The proteus layout module includes a comprehensive scheme for design reuse in the form of board templates and technology data. These dimensions are used to minimize any impedance discontinuities along the length of the trace. This video explains one of possible pcb layout techniques used for ddr2 ddr3 length matching in altium designer. Length tuning and matching altium designer 17 advanced. Different types of trace tuning for trace length matching in pcb design. Now you can download a free trial of altium designer and learn more about the industrys best layout, simulation, and production planning tools. Highspeed digital board design with altium designer. 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. Down load all the info on the arm you are using, you should find info on routing rules for the ddr bus. H 3 2 antenna basics an antenna is basically a conductor exposed in space. Mainly because, 1, youre actually doing the length matching, and 2, youre using arcs. 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. Altium has a lot of free templates for different form factors.
How to use the interactive length tuning during pcb editing to add. After this course, you will know how to design your own boards in altium designer. We spend countless hours researching various file formats and software that can open, convert, create or otherwise work with those files. 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. 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. Browse the vast library of free altium design content including components, templates and reference designs. Altium pads desktop pcb design blogs mentor graphics. The focus should be on preserving the timing, match the lengths close enough. 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. Learn more about trace length matching with interactive routing in altium designer.
Dec 26, 2011 this video explains one of possible pcb layout techniques used for ddr2 ddr3 length matching in altium designer. Hi speeddesigntutorialforaltiumdesigner slideshare. Download a free trial to find out which altium software best suits your needs. Now you can download a free trial of altium and learn more about the layout. For differential pair interactive length tuning to work properly, there are a few preconditions that must be true before you can do that. Hyperlynx design rule checking starter editions mentor. Mastering the matching of the lines xsignals and length tuning. You can also use trace length rule constraints and automated tuning functions to help you. Tuning and matching route lengths is also an essential ingredient of differential pair routing. This video explains how to setup a length matching rule and do interactive length. We spend countless hours researching various file formats and software that. 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.
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. A colleague and i had a discussion and a disagreement about the different ways high speed signals can be lengthmatched. In this altium designer 17 advanced pcb training course module, you will learn. The database is hosted on a dedicated cloud platform built for the library, to ensure you always have the latest components. 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. Pcb length matching implementation signal integrity tutorials. Learn more about the high speed design tools in altium designer. 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.
Altium designer also offers plenty of addons that will help you take your designs to the next level. The length rule now respects the xsignal type queries listed above. 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. The celestial altium library is a massive, free, open source database library for altium designer created by altium industry expert mark harris. Many times a signal integrity engineer uses words like as small as possible to describe the difference in length of matching group signal. It generally will tell you how close to keep the lengths and may have special requirements. 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. 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. By downloading and using these sunstone specific rule sets you can have. Download all the example files associated with this training here. Question about trace length matching patterns for high speed. Signal routing and length tuning simple pointtopoint net length control. How to use the length design rule class to specify lengths for.
For many designs, an important aspect of routing the pcb is knowing the net length. Contractworks makes executing, storing, and tracking corporate agreements easier. Fedevel development we specialize in advanced digital hardware development with a focus on motherboard, processor and microcontroller board design including power supplies, digital analog. Altium differential pair and tuning length routing my. 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. With a little bit of added work upfront creating new rules for length matching via additional classes. A user can create several templates representing common projects and then initialise new layouts from template to preload all of the configured information. Where altium users and enthusiasts can interact with each other. A switching power supply design is used as an example to demonstrate the whole process of designing a board.
I managed also to use altium signal integrity tool through drc to check for impedance matching, overshoot and undershoot. Altium differential pair and tuning length routing. Download the excel spreadsheet used in the video here. The length rule is used to ensure that the overall routed length is within the specified range. Your length matching settings and meander geometry should be easily accessed directly from the layout. 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. Differential pair length matching for gige100m ethernet. Pcb length matching implementation signal integrity. Pcb layout considerations for length tolerance matching.
With altium designer, design complex boards and instantly see the board. Altium uses a unified interface that makes routing. I have provided a continuous pulse stimulus of 1volt and managed to. If the length of the conductor is a certain ratio or multiple of the. Measurement tools online documentation for altium products. 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. Matching trace lengths within a predefined tolerance interval is easy when you work with the best autointeractive routing tools. Adding a miter for length tuning should be as easy as dragging the mouse across the mismatched trace. Discover features you didnt know existed and get the most out of those you already know about.
Length tuning in altium just got better hardware, software. This does not help either the automation software of the pcb design professional to successfully implement the constraint. 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. Pcie layout and routing guidelines blog altium designer. Altium offers a limitedtime free trial of its software. Sep 19, 2019 in this altium designer 17 advanced pcb training course module, you will learn. Click the button below to download the latest altium designer installer. 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. Location bangalore posts 8 helped 0 0 points 592 level 5. Altium kindly issued a trial license to me for the viewer but i cannot figure out how to download.
Manage pcb trace lengths for optimal system timing altium. How to use the length design rule class to specify lengths for nets and net classes. Altium designer ddr2 ddr3 length matching welldone blog. Grafic display with pic24 and ks0108 controller and touch.
Altium circuitmaker free pcb design tool for opensource. Trace tuning for routing length matching by altium audio bites from desktop or your mobile device. The first rule defines the pairtopair length matching requirements, and has the constraint set to group matched lengths. Interactive tuning gives you the ability to automatically add a tuning. Work with the best high speed design features in altium designer. This video explains how to setup a length matching rule and do interactive length tuning in altium designer. There are 2 types of length matching available today to reduce that which is historically a very time consuming and tedious task. 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. Location india posts 77 helped points 2,008 level 10.
Altium designer november 22, 2017 the first time i heard someone talking about tuning their highspeed pcb design, the memory of my middle. For example, if you need to design a pcie card, you dont have to create it from scratch. A guideline from schematic to pcb design based on altium. Altium how to set and use layer type very useful in. It is a more comprehensive document on high speed design in altium. Considering the tight timing requirements at gig speeds, the signal from one side of.
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. When this constraint option is used, the software will detect all. Question about trace length matching patterns for high. 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. Online drc, batch drc, the equalize net lengths feature, interactive length tuning. 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. 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. Submit ideas and vote for new features you want in altium tools. Tbranches, daisychain flyby routing, and serial terminations.
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. Now you can use trace length report generators and realtime trace length reporting, while you are routing, to find the exact trace length. 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. Both rules used for net length matching high speed length and high speed matched lengths can now also be used to adjust delays. Showcasing the proper use of altium designer tool features length tuning and xsignals. But given that length matching is required, it looks like everything youre doing is done as well as it can be.1177 229 340 1507 38 1228 54 1536 287 207 692 1559 302 788 1511 623 21 201 1589 378 1569 151 471 446 33 287 465 841 1295 278 1444 792 1068