177 lines
5.6 KiB
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177 lines
5.6 KiB
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<!--Converted with LaTeX2HTML 2012 (1.2)
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original version by: Nikos Drakos, CBLU, University of Leeds
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* revised and updated by: Marcus Hennecke, Ross Moore, Herb Swan
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* with significant contributions from:
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<TITLE>DpgenSfft</TITLE>
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<td class="navigation" align="left" width="33%"><A HREF="node37.html">DpgenSff</A></td>
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<td class="navigation" align="center" width="34%"><A HREF="dpgen.html">Dpgen generators User's Manual</A></td>
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<H1><A NAME="SECTION000380000000000000000">
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DpgenSfft</A>
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</H1>
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<UL>
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<LI><SPAN CLASS="textbf">Name</SPAN> : DpgenSfft - Static Flip-Flop with Scan-Path Macro-Generator
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</LI>
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<LI><SPAN CLASS="textbf">Synopsys</SPAN> :
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<PRE>
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Generate ( 'DpgenSfft', modelname
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, param = { 'nbit' : n
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, 'physical' : True
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, 'behavioral' : True
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}
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)
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</PRE>
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</LI>
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<LI><SPAN CLASS="textbf">Description</SPAN> : Generates a n bits static flip-flop with scan-path named <code>modelname</code>. The two latches of this flip-flop are static i.e. each one is made of two interters looped togethers.
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</LI>
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<LI><SPAN CLASS="textbf">Terminal Names</SPAN> :
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<UL>
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<LI><SPAN CLASS="textbf">scan</SPAN> : scan-path mode (input, 1 bit)
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</LI>
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<LI><SPAN CLASS="textbf">scin</SPAN> : scan path in (input, 1 bit)
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</LI>
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<LI><SPAN CLASS="textbf">wen</SPAN> : write enable (1 bit)
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</LI>
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<LI><SPAN CLASS="textbf">ck</SPAN> : clock signal (1 bit)
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</LI>
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<LI><SPAN CLASS="textbf">i0</SPAN> : data input (<code>n</code> bits)
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</LI>
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<LI><SPAN CLASS="textbf">q</SPAN> : output (<code>n</code> bits)
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</LI>
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<LI><SPAN CLASS="textbf">vdd</SPAN> : power
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</LI>
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<LI><SPAN CLASS="textbf">vss</SPAN> : ground
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</LI>
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</UL>
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</LI>
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<LI><SPAN CLASS="textbf">Parameters</SPAN> : Parameters are given in the a map <code>param</code>.
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<UL>
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<LI><SPAN CLASS="textbf">nbit</SPAN> (mandatory) : Defines the size of the generator
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</LI>
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<LI><SPAN CLASS="textbf">physical</SPAN> (optional, default value : False) : In order to generate a layout
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</LI>
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<LI><SPAN CLASS="textbf">behavioral</SPAN> (optional, default value : False) : In order to generate a behavior
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</LI>
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</UL>
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</LI>
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<LI><SPAN CLASS="textbf">How it works</SPAN> :
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<UL>
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<LI>When scan is set to <code>one</code>, it enables the scan-path mode. Note that in scan-path mode, the wen signal is not effective
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</LI>
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<LI>scin : the input of the scan-path. This terminal is different from <code>i0[0]</code>. The scout is <code>q[N</code>-<code>1]</code> (in the following example this is <code>q[3]</code>)
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</LI>
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<LI>When wen is set to <code>one</code>, it enables the writing of the flip-flop
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</LI>
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</UL>
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</LI>
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<LI><SPAN CLASS="textbf">Example</SPAN> :
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<PRE>
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from stratus import *
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class inst_sfft ( Model ) :
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def Interface ( self ) :
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self.scan = SignalIn ( "scin", 1 )
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self.scin = SignalIn ( "scan", 1 )
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self.ck = SignalIn ( "ck", 1 )
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self.wen = SignalIn ( "wen", 1 )
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self.i = SignalIn ( "in", 4 )
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self.o = SignalOut ( "out", 4 )
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self.vdd = VddIn ( "vdd" )
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self.vss = VssIn ( "vss" )
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def Netlist ( self ) :
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Generate ( 'DpgenSfft', 'sfft_4'
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, param = { 'nbit' : 4
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, 'physical' : True
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}
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)
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self.I = Inst ( 'sfft_4', 'inst'
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, map = { "wen" : self.wen
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, "ck" : self.ck
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, "scan" : self.scan
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, "scin" : self.scin
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, "i0" : self.i
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, "q" : self.o
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, 'vdd' : self.vdd
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, 'vss' : self.vss
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}
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)
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def Layout ( self ) :
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Place ( self.I, NOSYM, Ref(0, 0) )
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</PRE>
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</LI>
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</UL>
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<P>
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<p>
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<hr><table align="center" width="100%" cellpadding="0" cellspacing="2">
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<tr><td class="navigation" align="left" width="33%"><B>Previous</B></td>
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<td class="navigation" align="center" width="34%"><B>Up</B></td>
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<td class="navigation" align="right" width="33%"><B>Next</B></td>
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</tr><tr>
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<td class="navigation" align="left" width="33%"><A HREF="node37.html">DpgenSff</A></td>
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<td class="navigation" align="center" width="34%"><A HREF="dpgen.html">Dpgen generators User's Manual</A></td>
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<td class="navigation" align="right" width="33%"><A HREF="node39.html">About this document ...</A></td>
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<ADDRESS>
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Sophie B<small>ELLOEIL</small><br>20051116.1
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