<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe
                class="youtube-player"
                src="https://www.youtube.com/embed/j2YGHZG1bLY?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en&autohide=2&wmode=transparent"
                allowfullscreen="true"
                style="border: 0px; display: block; margin: 0px; width: 740px; height: 416.418px;"
                sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"
                data-ratio="0.5627272727272727" data-width="1100" data-height="619"></iframe></span>
    </div>
    <div class="blog-content">
Watch how we probe the silicon of a chip and do laser drilling of a silicon die. A lot of information about why and how to probe silicon. Thank you very much John McMaster.
    </div>
    
    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">What</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:18</span><span class="chapters-text">Why to probe silicon?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">04:39</span><span class="chapters-text">How is the silicon probed? How does the probe look?</span></li>
            <li class="chapters-list-item"><span class="chapters-time">09:06</span><span class="chapters-text">Probe needles</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:49</span><span class="chapters-text">About probing silicon</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:36</span><span class="chapters-text">How to remove package</span></li>
            <li class="chapters-list-item"><span class="chapters-time">20:36</span><span class="chapters-text">Probing and broken bond wires</span></li>
            <li class="chapters-list-item"><span class="chapters-time">24:12</span><span class="chapters-text">Probing to read firmware, bypassing on chip fuses</span></li>
            <li class="chapters-list-item"><span class="chapters-time">29:37</span><span class="chapters-text">What microscope to use to probe chips</span></li>
            <li class="chapters-list-item"><span class="chapters-time">40:21</span><span class="chapters-text">Material the probes are made from</span></li>
            <li class="chapters-list-item"><span class="chapters-time">41:35</span><span class="chapters-text">How to know where to probe the silicon</span></li>
            <li class="chapters-list-item"><span class="chapters-time">51:46</span><span class="chapters-text">Why / how - wafer test</span></li>
            <li class="chapters-list-item"><span class="chapters-time">59:31</span><span class="chapters-text">About John and his work</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:04:56</span><span class="chapters-text">More about probes</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:08:46</span><span class="chapters-text">Probe cards</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:12:33</span><span class="chapters-text">Wafer probers / testers</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:18:26</span><span class="chapters-text">Wafer storage</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:22:13</span><span class="chapters-text">Optical probing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:25:34</span><span class="chapters-text">Alignment</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:28:00</span><span class="chapters-text">Wafers aren't flat</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:30:13</span><span class="chapters-text">Probe holders - Micro positioners</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:37:19</span><span class="chapters-text">About extracting firmware from 80C51</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:42:15</span><span class="chapters-text">Hans on micro probing class</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:44:16</span><span class="chapters-text">Live chip probing</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:47:55</span><span class="chapters-text">Live: Preparing the probe</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:52:51</span><span class="chapters-text">Live: Putting the probe on silicon</span></li>
            <li class="chapters-list-item"><span class="chapters-time">2:00:34</span><span class="chapters-text">Live: Laser drilling to silicon </span></li>
        </ul>
    </div>

    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.linkedin.com/in/mcmasterjohn/">John´s Linked In</a></li>
            <li class="links-list-item"><a href="https://twitter.com/johndmcmaster">John´s Twitter / X</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

How to probe the silicon inside of a chip | Explained by John McMaster

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe
                class="youtube-player"
                src="https://www.youtube.com/embed/OqN7xNn92pc?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en&autohide=2&wmode=transparent"
                allowfullscreen="true"
                style="border: 0px; display: block; margin: 0px; width: 740px; height: 416.418px;"
                sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"
                data-ratio="0.5627272727272727" data-width="1100" data-height="619"></iframe></span>
    </div>
    <div class="blog-content">
        After watching this video you may be considering CAN for your next project. Thank you very much Ken.
    </div>
    <div class="blog-content-chapters">
        <div>
            Chapters:
        </div>
        <ul class="chapters-list">
            <li class="chapters-list-item"><span class="chapters-time">00:00</span><span class="chapters-text">What is this video about</span></li>
            <li class="chapters-list-item"><span class="chapters-time">00:25</span><span class="chapters-text">About CAN bus</span></li>
            <li class="chapters-list-item"><span class="chapters-time">03:11</span><span class="chapters-text">Hardware setup and CAN boards used in this video</span></li>
            <li class="chapters-list-item"><span class="chapters-time">05:27</span><span class="chapters-text">CAN termination and cable</span></li>
            <li class="chapters-list-item"><span class="chapters-time">10:19</span><span class="chapters-text">How to use CAN in your own system</span></li>
            <li class="chapters-list-item"><span class="chapters-time">12:18</span><span class="chapters-text">MCP2518 CAN controller</span></li>
            <li class="chapters-list-item"><span class="chapters-time">13:08</span><span class="chapters-text">CAN Signals</span></li>
            <li class="chapters-list-item"><span class="chapters-time">17:07</span><span class="chapters-text">CAN Identifier</span></li>
            <li class="chapters-list-item"><span class="chapters-time">21:11</span><span class="chapters-text">CAN implementation in a system</span></li>
            <li class="chapters-list-item"><span class="chapters-time">23:33</span><span class="chapters-text">Handling errors in CAN bus</span></li>
            <li class="chapters-list-item"><span class="chapters-time">30:02</span><span class="chapters-text">Getting data based on request - remote frame</span></li>
            <li class="chapters-list-item"><span class="chapters-time">32:18</span><span class="chapters-text">Software setup</span></li>
            <li class="chapters-list-item"><span class="chapters-time">33:57</span><span class="chapters-text">Using microPython to communicate over CAN bus</span></li>
            <li class="chapters-list-item"><span class="chapters-time">39:44</span><span class="chapters-text">About CAN timestmaps</span></li>
            <li class="chapters-list-item"><span class="chapters-time">43:48</span><span class="chapters-text">CAN priority explained</span></li>
            <li class="chapters-list-item"><span class="chapters-time">49:46</span><span class="chapters-text">Tools to debug CAN bus</span></li>
            <li class="chapters-list-item"><span class="chapters-time">55:01</span><span class="chapters-text">What Ken does, CAN bus security</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:06:00</span><span class="chapters-text">Signal vs Reflections</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:11:36</span><span class="chapters-text">CAN bus baudrate</span></li>
            <li class="chapters-list-item"><span class="chapters-time">1:14:41</span><span class="chapters-text">Are there CAN standards?</span></li>
        </ul>
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://www.linkedin.com/in/kentindell/">Ken's Linked In</a></li>
            <li class="links-list-item"><a href="https://canislabs.com/">Ken's company</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL courses</a></li>
        </ul>
    </div>  
</div>

CAN Bus is Simple and Actually Really Cool | Explained by Ken Tindell

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe
                class="youtube-player"
                src="https://www.youtube.com/embed/t8MKDOuAs78?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en&autohide=2&wmode=transparent"
                allowfullscreen="true"
                style="border: 0px; display: block; margin: 0px; width: 740px; height: 416.418px;"
                sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"
                data-ratio="0.5627272727272727" data-width="1100" data-height="619"></iframe></span>
    </div>
    <div class="blog-content">
Behind the scenes - have a look how libraries are created for EasyEDA software.
    </div>
    
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="https://jlcpcb.com/">Thank you very much to JLCPCB</a></li>
            <li class="links-list-item"><a href="https://fedevel.com/courses">FEDEVEL Online courses</a></li>
        </ul>
    </div>  
</div>

Visiting a Big Factory in China - How they create libraries #EasyEDA #LCSC #JLCPCB

<div class="entry-content">
    <div class="blog-content">
        DDR3 mirroring is a feature of memory controller.<br><br>

        See the following text from <a href="http://www.jedec.org/sites/default/files/docs/4_20_19R20.pdf">DDR3 SDRAM Unbuffered DIMM Design Specification</a> (JEDEC website – Registration is required, page 17).<br><br>

        <i>Following pins are being mirrored: A3<->A4, A5<->A6, A7<->A8, BA0<->BA1.<br><br>

        “Since the cross-wired pins have no secondary functions, there is no problem in normal operation. Any data written is read the same way. There are limitations however. When writing to the internal registers with a “load mode” operation, the specific address is required. This requires the controller to know if the rank is mirrored or not. This requires a few rules. Mirroring is done on 2 rank modules and can only be done on the second rank. There is not a requirement that the second rank be mirrored. There is a bit assignment in the SPD that indicates whether the module has been designed with the mirrored feature or not. See the DDR3 UDIMM SPD specification for these details. The controller must read the SPD and have the capability of de-mirroring the address when accessing the second rank.”</i>
    </div>

    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/8ea2f-ddr3_mirroring_pcb_layout.jpg" alt="DDR3_mirroring_PCB_layout" />
    </div>

    <div class="blog-content-text">
        To confirm this, have a look on the following pictures from <a href="http://www.jedec.org/sites/default/files/docs/design/DDR3/PC3_12800_UDIMM_V07_RC_B0_20070529.zip">PC3-12800 UDIMM</a> layout where I have selected A8 signal:
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/b9f76-ddr3_mirroring_top_and_bottom_layout.jpg" alt="DDR3_mirroring_top_and_bottom_layout" />
    </div>
    
    <div class="blog-content-text">
        <i>Details of A8 Top and Bottom Layer:</i>
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/b37e2-ddr3_mirroring_top_layout1.jpg" alt="DDR3_mirroring_top_layout" />
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/47294-ddr3_mirroring_bottom_layout.jpg" alt="DDR3_mirroring_bottom_layout" />
    </div>
    
    <div class="blog-content-text">
        <i>Screenshot from schematic for D1 and D9:</i>
    </div>
    <div class="blog-content-img-wrapper">
        <img src="https://assets.fedevel.com/blog/2019/10/9bb0b-ddr3_mirroring_schematic.jpg" alt="DDR3_mirroring_schematic" />
    </div>


    <div class="blog-content-text">
        Components D1 and D9 are listed in the BOM with same part number.
    </div>

   
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.jedec.org/sites/default/files/docs/4_20_19R20.pdf">DDR3 SDRAM Unbuffered DIMM Design Specification</a></li>
            <li class="links-list-item"><a href="http://www.jedec.org/sites/default/files/docs/design/DDR3/PC3_12800_UDIMM_V07_RC_B0_20070529.zip">PC3-12800 UDIMM</a></li>
        </ul>
    </div>  
</div>

DDR3 memory mirroring – PCB layout

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe
                class="youtube-player"
                src="https://www.youtube.com/embed/SxeW_-UcZqk?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en&autohide=2&wmode=transparent"
                allowfullscreen="true"
                style="border: 0px; display: block; margin: 0px; width: 740px; height: 416.418px;"
                sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"
                data-ratio="0.5627272727272727" data-width="1100" data-height="619"></iframe></span>
    </div>
    <div class="blog-content">
        This video explains how to generate a STEP file (3D output) from Altium Designer. It also explains how to add mounting holes into the 3D model.
    </div>
    <div class="blog-content-links">
        <div>
            Links:
        </div>
        <ul class="links-list">
            <li class="links-list-item"><a href="http://www.cadexchanger.com/">3D CAD software from this video (CAD Exchanger)</a></li>
        </ul>
    </div>  
</div>


Altium Designer – Generating 3D CAD File

<div class="entry-content">
    <div class="jetpack-video-wrapper"><span class="embed-youtube" style="text-align:center; display: block;"><iframe
                class="youtube-player"
                src="https://www.youtube.com/embed/QlNgoS3SEME?version=3&rel=1&showsearch=0&showinfo=1&iv_load_policy=1&fs=1&hl=en&autohide=2&wmode=transparent"
                allowfullscreen="true"
                style="border: 0px; display: block; margin: 0px; width: 740px; height: 416.418px;"
                sandbox="allow-scripts allow-same-origin allow-popups allow-presentation"
                data-ratio="0.5627272727272727" data-width="1100" data-height="619"></iframe></span>
    </div>
    <div class="blog-content">
        This video explains how to do differential pair routing and how to setup rules for different impedances in Altium Designer PCB layout.
    </div>
</div>


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