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<h1 id="firstHeading" class="firstHeading">XC9500XL CPLD breakout board</h1>
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<tr>
<th style="text-align: center; color: #fff; border: 1px solid #1E7B8E; background-color:#1E7B8E; font-size: 11px;" colspan="2">Project Summary
</th></tr>
<tr>
<td colspan="2">
</td></tr>
<tr>
<th> Name:
</th><td> XC9500XL CPLD breakout board
</td></tr>
<tr>
<th> Buy it:
</th><td> <a href="http://www.seeedstudio.com/depot/xc9572xl-cpld-development-board-p-799.html?cPath=174" class="external text" rel="nofollow">Get one for $15 at Seeed Studio</a>
</td></tr>
<tr>
<th> Price:
</th><td> $15
</td></tr>
<tr>
<th> Status:
</th><td> <a href="/docs/Project_status#Development_status" title="Project status">Test production</a>
</td></tr>
<tr>
<th> Manufacturing:
</th><td> <a href="/docs/Project_status#Manufacturing" title="Project status">Shipping</a>
</td></tr>
<tr>
<th> Forum:
</th><td> <a href="http://dangerousprototypes.com/forum/viewforum.php?f=51" class="external text" rel="nofollow">XC9500XL CPLD breakout board Forum</a>
</td></tr></table><a href="/docs/File:Xc9572-cpld-breakoutvib.jpg" class="image"><img alt="Xc9572-cpld-breakoutvib.jpg" src="/docs/images/6/6c/Xc9572-cpld-breakoutvib.jpg" width="490" height="277" /></a>
<p>Ever get stuck choosing the right logic chip combination or voltage level translator? Give up the hunt and create your own custom logic chip. CPLDs can give you the logic you need, with the pinout you want, while saving board space and board revisions.
</p><p>The Xilinx XC9500XL family has some of the cheapest and readily-available CPLDs. This development board from Dangerous Prototypes will help you build your first custom logic chip using simple schematic entry, Verilog, or VHDL.
</p>
<ul><li>XC9572XL CPLD with 72 macrocells
</li><li>5volt tolerant inputs
</li><li>On-board 3.3volt power supply for core and pins
</li><li>Selectable 3.3volt or external supply for pins (1.8volt to 3.3volt)
</li><li>LEDs for output
</li><li>Push button for input
</li><li>Populated JTAG header
</li><li>Unpopulated oscillator footprint on the bottom
</li><li>Easy to program with the Bus Pirate
</li><li>Pre-programmed with <a href="/docs/CPLD_intro_3:_Inverse_LED_toggle" title="CPLD intro 3: Inverse LED toggle">LED inverse toggle demo</a>
</li><li>Open source (CC-BY-SA)
</li></ul>
<p><b><a href="http://www.seeedstudio.com/depot/xc9572xl-cpld-development-board-p-799.html?cPath=174" class="external text" rel="nofollow">Available for $15 at Seeed Studio</a></b>
</p>
<table id="toc" class="toc"><tr><td><div id="toctitle"><h2>Contents</h2></div>
<ul>
<li class="toclevel-1 tocsection-1"><a href="#Overview"><span class="tocnumber">1</span> <span class="toctext">Overview</span></a></li>
<li class="toclevel-1 tocsection-2"><a href="#Hardware"><span class="tocnumber">2</span> <span class="toctext">Hardware</span></a>
<ul>
<li class="toclevel-2 tocsection-3"><a href="#XC9572XL_CPLD"><span class="tocnumber">2.1</span> <span class="toctext">XC9572XL CPLD</span></a></li>
<li class="toclevel-2 tocsection-4"><a href="#Power_supply"><span class="tocnumber">2.2</span> <span class="toctext">Power supply</span></a></li>
<li class="toclevel-2 tocsection-5"><a href="#Button_and_LEDs"><span class="tocnumber">2.3</span> <span class="toctext">Button and LEDs</span></a></li>
<li class="toclevel-2 tocsection-6"><a href="#Pinout_table"><span class="tocnumber">2.4</span> <span class="toctext">Pinout table</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-7"><a href="#PCB"><span class="tocnumber">3</span> <span class="toctext">PCB</span></a>
<ul>
<li class="toclevel-2 tocsection-8"><a href="#Partslist"><span class="tocnumber">3.1</span> <span class="toctext">Partslist</span></a></li>
</ul>
</li>
<li class="toclevel-1 tocsection-9"><a href="#Programming"><span class="tocnumber">4</span> <span class="toctext">Programming</span></a></li>
<li class="toclevel-1 tocsection-10"><a href="#Get_one.21"><span class="tocnumber">5</span> <span class="toctext">Get one!</span></a></li>
<li class="toclevel-1 tocsection-11"><a href="#Resources"><span class="tocnumber">6</span> <span class="toctext">Resources</span></a></li>
<li class="toclevel-1 tocsection-12"><a href="#License"><span class="tocnumber">7</span> <span class="toctext">License</span></a></li>
</ul>
</td></tr></table><script>if (window.showTocToggle) { var tocShowText = "show"; var tocHideText = "hide"; showTocToggle(); } </script>
<h2> <span class="mw-headline" id="Overview">Overview</span></h2>
<p><a href="/docs/File:XC9572XL-CPLD-breakout-dia.png" class="image"><img alt="XC9572XL-CPLD-breakout-dia.png" src="/docs/images/thumb/2/2a/XC9572XL-CPLD-breakout-dia.png/490px-XC9572XL-CPLD-breakout-dia.png" width="490" height="500" /></a>
</p>
<h2> <span class="mw-headline" id="Hardware">Hardware</span></h2>
<p><a href="/docs/File:Cct-XC9572XL-CPLD-breakout-lv.png" class="image"><img alt="Cct-XC9572XL-CPLD-breakout-lv.png" src="/docs/images/thumb/c/cd/Cct-XC9572XL-CPLD-breakout-lv.png/490px-Cct-XC9572XL-CPLD-breakout-lv.png" width="490" height="366" /></a>
</p><p>Click for a full size schematic image. Schematic and PCB were designed with the freeware version of <a href="http://www.cadsoft.de" class="external text" rel="nofollow">Cadsoft Eagle</a>, download the latest project files from our <a href="http://code.google.com/p/dangerous-prototypes-open-hardware/source/browse/#svn%2Ftrunk%2FCPLD-breakout" class="external text" rel="nofollow">Google Code project SVN</a>.
</p>
<h3> <span class="mw-headline" id="XC9572XL_CPLD">XC9572XL CPLD</span></h3>
<p><a href="/docs/File:XC9572XL-CPLD-breakout-cpld.jpg" class="image"><img alt="XC9572XL-CPLD-breakout-cpld.jpg" src="/docs/images/6/6d/XC9572XL-CPLD-breakout-cpld.jpg" width="490" height="273" /></a>
</p><p>The XC9572XL (U1) is a 72 macrocell CPLD with 5volt tolerant pins. It is one of the smallest CPLDs made by Xilinx, and is readily available from Digikey for around $2.40.
</p><p>The CPLD core requires a 3.3volt supply to each VINT pin. This supply is provided by the on board 3.3volt regulator.
</p><p>The IO pins operate from a separate supply of 1.2volts to 3.3volts. An external supply can be connected to either IO pin, or place a jumper on VIO to connect the on board 3.3volt power supply.
</p><p>Each supply pin has a 0.1uF capacitor (C1,C2,C3,C4).
</p><p>The JTAG programming pins are brought to header JT. The JTAG interface is powered by the 3.3volt core supply.
</p>
<ul><li>For more see the <a href="/docs/Xilinx_XC9500XL_CPLD_quick_start" title="Xilinx XC9500XL CPLD quick start">Xilinx XC9500XL CPLD quick start</a>
</li></ul>
<h3> <span class="mw-headline" id="Power_supply">Power supply</span></h3>
<p>A 3.3volt regulator (U2) powers the CPLD core and (optionally) the IO pins. C5 and C6 are 3.3uF input and out capacitors. Capacitor C7 is an optional feedback bypass capacitor that can be used with some voltage regulators, it is not used here.
</p><p>The 3.3volt regulator is supplied through pin V+. The supply can be up to 5volts. Up to 100mA is available from the 3v3 pin when using the on-board regulator.
</p><p>LED PWR lights if the power supply is active.
</p>
<h3> <span class="mw-headline" id="Button_and_LEDs">Button and LEDs</span></h3>
<p><a href="/docs/File:XC9572XL-CPLD-breakout-userio.jpg" class="image"><img alt="XC9572XL-CPLD-breakout-userio.jpg" src="/docs/images/7/74/XC9572XL-CPLD-breakout-userio.jpg" width="490" height="313" /></a>
</p><p>Two LEDs (D1, D2) and a push button (PB) are included for a little user IO.
</p><p>LED D1 and D2 source current from the CPLD. Generally, designers sink current from CPLDs and FPGAs - the chip connects the LED to ground instead of power - because many parts can sink 20mA but only source a few. On this chip, however, the maximum current is a paltry 8mA for both source and sink. The LEDs have 2K resistors (R2,R3) that keep the current at an acceptable 2mA.
</p><p>A push button (PB) provides a way for user input. Resistor R1 holds the CPLD pin high when the button is not pressed. When the button is pressed the pin is connect to ground and taken low.
</p>
<h3> <span class="mw-headline" id="Pinout_table">Pinout table</span></h3>
<table class="wikitable" border="1">
<caption> Pinout
</caption><tr>
<th> FB4/2 </th><th>Description</th><th>Description</th><th> FB3/FB1
</th></tr>
<tr>
<td> GND </td><td>Ground connection </td><td>Ground connection </td><td>GND
</td></tr>
<tr>
<td> V+ </td><td>Supply voltage (max 5volts)</td><td>Supply voltage</td><td> V+
</td></tr>
<tr>
<td> 3V3</td><td>3.3volt output (max 100mA) </td><td>IO external supply (1.2-3.3volts) </td><td>IO
</td></tr>
<tr>
<td> IO</td><td>IO external supply</td><td>Push button</td><td> 18
</td></tr>
<tr>
<td> 19</td><td> </td><td> </td><td> 16
</td></tr>
<tr>
<td> 20</td><td> </td><td> </td><td> 14
</td></tr>
<tr>
<td> 21</td><td> </td><td> </td><td> 13
</td></tr>
<tr>
<td> 22</td><td> </td><td> </td><td> 12
</td></tr>
<tr>
<td> 23</td><td> </td><td> </td><td> 8
</td></tr>
<tr>
<td> 27</td><td> </td><td> </td><td> 6
</td></tr>
<tr>
<td> 28</td><td> </td><td> </td><td> 5
</td></tr>
<tr>
<td> 29</td><td> </td><td> </td><td> 3
</td></tr>
<tr>
<td> 30</td><td> </td><td> </td><td> 2
</td></tr>
<tr>
<td> 31</td><td> </td><td> </td><td> 1
</td></tr>
<tr>
<td> 32</td><td> </td><td> </td><td> 44
</td></tr>
<tr>
<td> 33</td><td> </td><td> </td><td> 43
</td></tr>
<tr>
<td> 34</td><td> </td><td> </td><td> 42
</td></tr>
<tr>
<td> 36</td><td> </td><td> </td><td> 41
</td></tr>
<tr>
<td> 37</td><td> </td><td> </td><td> 40
</td></tr>
<tr>
<td> 38</td><td>LED D2</td><td>LED D1</td><td> 39
</td></tr></table>
<h2> <span class="mw-headline" id="PCB">PCB</span></h2>
<p><a href="/docs/File:Pcb-XC9572XL-CPLD-breakout-lv.jpg" class="image"><img alt="Pcb-XC9572XL-CPLD-breakout-lv.jpg" src="/docs/images/9/9d/Pcb-XC9572XL-CPLD-breakout-lv.jpg" width="490" height="279" /></a>
</p><p>We used the freeware version of <a href="http://www.cadsoft.de/" class="external text" rel="nofollow">Cadsoft Eagle</a> to make the schematic and PCB. Download the latest board files from <a href="http://code.google.com/p/dangerous-prototypes-open-hardware/source/browse/#svn%2Ftrunk%2FCPLD-breakout" class="external text" rel="nofollow">SVN</a>.
</p>
<h3> <span class="mw-headline" id="Partslist">Partslist</span></h3>
<p><a href="/docs/File:Board-XC9572XL-CPLD-breakout-iv.png" class="image"><img alt="Board-XC9572XL-CPLD-breakout-iv.png" src="/docs/images/thumb/8/88/Board-XC9572XL-CPLD-breakout-iv.png/490px-Board-XC9572XL-CPLD-breakout-iv.png" width="490" height="295" /></a>
</p><p>Click for a full size placement image.
</p>
<table class="wikitable" border="1">
<caption> partlist
</caption><tr>
<th> Parts </th><th> Quantity </th><th> Value </th><th> Package
</th></tr>
<tr>
<td> C1,C2,C3,C4 </td><td> 4 </td><td> <a href="http://www.mouser.com/Search/ProductDetail.aspx?R=C0603C104K5RACTUvirtualkey64600000virtualkey80-C0603C104K5R" class="external text" rel="nofollow">0.1uF</a> </td><td> C603
</td></tr>
<tr>
<td> C5,C6 </td><td> 2 </td><td> <a href="http://www.mouser.com/ProductDetail/Kemet/T491A335K016AT7280/?qs=sGAEpiMZZMsh%252b1woXyUXj5o2u5v0rqXQreqCFpobM0A%3d" class="external text" rel="nofollow">3.3uF tantalum</a> </td><td> SMC_A
</td></tr>
<tr>
<td> D1, D2, PWR </td><td> 3 </td><td> <a href="http://www.mouser.com/Search/ProductDetail.aspx?R=598-8140-107Fvirtualkey64500000virtualkey645-598-8140-107F" class="external text" rel="nofollow">Yellow LED</a> </td><td> LED-805
</td></tr>
<tr>
<td> JTAG </td><td> 1 </td><td> 0.1” Pin header </td><td> 1X06
</td></tr>
<tr>
<td> PB </td><td> 1 </td><td> <a href="http://www.mouser.com/Search/ProductDetail.aspx?R=SKQGADE010virtualkey68800000virtualkey688-SKQGAD" class="external text" rel="nofollow">SMD button, small</a> </td><td> TACT_SWITCH_SMALL
</td></tr>
<tr>
<td> R1 </td><td> 1 </td><td> <a href="http://www.mouser.com/Search/ProductDetail.aspx?R=CR0603-JW-103GLFvirtualkey65210000virtualkey652-CR0603-JW-103GLF" class="external text" rel="nofollow">10K</a> </td><td> R603
</td></tr>
<tr>
<td> R2,R3, R4 </td><td> 3 </td><td> <a href="http://www.mouser.com/Search/ProductDetail.aspx?R=CRCW06032K00FKEAvirtualkey61300000virtualkey71-CRCW0603-2.0K-E3" class="external text" rel="nofollow">2K</a> </td><td> R603
</td></tr>
<tr>
<td> VIO </td><td> 1 </td><td> 0.1” Pin header </td><td> M1X2
</td></tr>
<tr>
<td> U1 </td><td> 1 </td><td> <a href="http://search.digikey.com/scripts/DkSearch/dksus.dll?vendor=0&amp;keywords=+122-1448-N" class="external text" rel="nofollow">XC9572XL_VQ44</a> </td><td> VQ44
</td></tr>
<tr>
<td> U2 </td><td> 1 </td><td> <a href="http://www.mouser.com/Search/ProductDetail.aspx?R=SI9183DT-33-T1-E3virtualkey61360000virtualkey781-SI9183DT-33-E3" class="external text" rel="nofollow">3.3volt LDO voltage regulator 150mA</a> </td><td> SOT-23-5
</td></tr></table>
<ul><li> <a href="http://www.mouser.com/ProjectManager/ProjectDetail.aspx?AccessID=46202208a9" class="external text" rel="nofollow">Shopping cart at Mouser</a>
</li></ul>
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Q1 on the bottom of the PCB is for an optional 3.3volt oscillator. It feeds into a global clock pin. Some suitable values are:
</p>
<ul><li><a href="http://www.mouser.com/ProductDetail/ABRACON/ASV-20000MHZ-EJ-T/?qs=H8AWquzS%2flNowiZ9Nk9Uyw%3d%3d" class="external text" rel="nofollow">20MHz</a>
</li><li><a href="http://www.mouser.com/ProductDetail/ABRACON/ASV-50000MHZ-EJ-T/?qs=H8AWquzS%2flOR%252bU4UILwQkw%3d%3d" class="external text" rel="nofollow">50MHz</a>
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<h2> <span class="mw-headline" id="Programming">Programming</span></h2>
<p><a href="/docs/CPLD:_Complex_programmable_logic_devices#Programming" title="CPLD: Complex programmable logic devices">Development and programming tutorials</a> are on the main CPLD page.
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<h2> <span class="mw-headline" id="Resources">Resources</span></h2>
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</li><li><a href="/docs/Xilinx_XC9500XL_CPLD_quick_start" title="Xilinx XC9500XL CPLD quick start">XC9500XL CPLD quick start</a>
</li><li><a href="http://www.xilinx.com/support/documentation/data_sheets/ds054.pdf" class="external text" rel="nofollow">XC9500XL family manual</a>
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