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2026-04-11T06:01:24Z
Benutzerbeiträge
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https://www.mikrocontroller.net/index.php?title=UCF-Dateien&diff=62873
UCF-Dateien
2011-12-30T20:34:08Z
<p>79.83.80.11: /* Weblinks */ Namen werden groß geschrieben</p>
<hr />
<div>Hier eine kleine Merkhilfe zu Xilinx-.ucf-Dateien. In den .ucf-Dateien (User Constraint File) wird die Verbindung von logischen Netzen (in- und out-Ports im top level entity) mit physikalischen Pins hergestellt. Zusätzlich können auch Timing-Bedingungen abgebildet werden.<br />
<br />
Die hier angegebenen Definitionen sind nur Beispiele. Sie müssen an die konkrete Hardware angepasst werden! <br />
<br />
'''Bei fehlerhaften Zuweisungen kann Hardware zerstört werden!'''<br />
<br />
'''Hinweis:'''<br />
Damit der Fitter die Pinzuweisungen in der .ucf-Datei auch beachtet, muß in den Fitter-Properties die Einstellung "Use Location Constrains" auf "Always" oder "Try" gesetzt sein. Auf jeden Fall sollte man im Fitter-Report nachschauen, ob die Signale auch auf die gewünschten Pins geroutet wurden.<br />
<br />
== Taktdefinition==<br />
NET CLOCK LOC = AA12;<br />
NET CLOCK TNM_NET = "CLOCK_50";<br />
TIMESPEC TS_CLOCK_50 = PERIOD CLOCK_50 50 MHz HIGH 50 %;<br />
<br />
== unkritisches Timing ==<br />
NET reset LOC = D8;<br />
NET reset TIG;<br />
<br />
== Pinzuordung==<br />
NET LED LOC = W2;<br />
NET SWITCH_n LOC = D1;<br />
<br />
NET VGA_RED<2> LOC = X4;<br />
NET VGA_RED<1> LOC = W5;<br />
NET VGA_RED<0> LOC = T9;<br />
<br />
== Ausgangstreiber==<br />
NET my_netname FAST;<br />
NET my_netname DRIVE = 12;<br />
NET "*" IOSTANDARD = LVTTL;<br />
<br />
== Pullup/-down==<br />
NET netname PULLUP;<br />
NET netname PULLDOWN;<br />
<br />
== Kombinationen==<br />
NET netname LOC = A1 | DRIVE = 2 | FAST;<br />
<br />
== Weblinks ==<br />
* http://www.xilinx.com/itp/xilinx10/books/docs/cgd/cgd.pdf: Xilinx Constraints Guide 10<br />
* http://www.xilinx.com/support/documentation/sw_manuals/xilinx11/cgd.pdf: Xilinx Constraints Guide 11<br />
* http://direct.xilinx.com/bvdocs/whitepapers/wp237.pdf: What are OFFSET Constraits?<br />
* http://forums.xilinx.com/t5/PLD-Blog/Timing-Constraints-Part-1-of-5/ba-p/57594: Timing Constraints by Xilinx Employee Austin Lesea<br />
<br />
<br />
[[Category:Xilinx ISE]]</div>
79.83.80.11
https://www.mikrocontroller.net/index.php?title=Logische_Verkn%C3%BCpfungen&diff=61542
Logische Verknüpfungen
2011-11-09T11:50:49Z
<p>79.83.80.11: müll entfernt</p>
<hr />
<div>====UND====<br />
Verknüpfung (Konjunktion)<br />
<br />
:<math>x = a \wedge b</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:AND.png]]</td><br />
<br />
<td><br />
<br />
<table border="0"><br />
<tr><br />
<td> ''' a ''' </td><br />
<td> ''' b ''' </td><br />
<td> | </td><br />
<td> ''' x ''' </td><br />
</tr><br />
<td>----</td><br />
<td>----</td><br />
<td>+</td><br />
<td>----</td><br />
<tr><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td> | </td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td> | </td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td> | </td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td> | </td><br />
<td>1</td><br />
</tr><br />
</table><br />
</td><br />
</tr><br />
</table><br />
-----<br />
<br />
====ODER====<br />
Verknüpfung (Disjunktion)<br />
<br />
:<math>x = a \vee b</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:ODER.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
-----<br />
<br />
====NICHT====<br />
Verknüpfung (Negation)<br />
<br />
:<math>x = \overline{a}</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:NOT.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>-</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>-</td><br />
<td>0</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
-----<br />
<br />
====NAND====<br />
Verknüpfung<br />
<br />
:<math>x = \overline{a \wedge b}</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:NAND.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>0</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
----<br />
====NOR====<br />
Verknüpfung (Konjunktion)<br />
<br />
:<math>x = \overline{a \vee b}</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:NOR.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>0</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
-----<br />
<br />
====XOR====<br />
Exklusiv-ODER-Verknüpfung (Antivalenz)<br />
<br />
:<math>x = (a \wedge \overline{b}) \vee (\overline{a} \wedge b)</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:XOR.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>0</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
-----<br />
<br />
====XNOR====<br />
Exklusiv-NOR-Verknüpfung (Äquivalenz)<br />
<br />
:<math>x = (a \wedge b) \vee (\overline{a} \wedge \overline{b})</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:XNOR.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
-----<br />
<br />
'''Sperrgatter''' (Inhibition)<br />
<br />
:<math>x = \overline{a} \wedge b</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:Inhibition.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>0</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
-----<br />
<br />
'''Subjunktion''' (Implikation)<br />
<br />
:<math>x = \overline{a} \vee b</math><br />
<br />
<table border="0"><br />
<tr><br />
<td>[[Bild:Implikation.png]]</td><br />
<td><br />
<table border="1"><br />
<tr><br />
<td> '''a''' </td><br />
<td> '''b''' </td><br />
<td> '''x''' </td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>0</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>0</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>0</td><br />
<td>0</td><br />
</tr><br />
<tr><br />
<td>1</td><br />
<td>1</td><br />
<td>1</td><br />
</tr><br />
</table><br />
</td></tr><br />
</table><br />
<br />
[[Kategorie:Grundlagen]]</div>
79.83.80.11