75 lines
2.7 KiB
TeX
75 lines
2.7 KiB
TeX
\begin{itemize}
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\item \textbf{Name} : DpgenMux2 -- Multiplexer Macro-Generator
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\item \textbf{Synopsys} :
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\begin{verbatim}
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Generate ( 'DpgenMux2', modelname
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, param = { 'nbit' : n
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, 'drive' : d
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, 'physical' : True
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, 'behavioral' : True
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}
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)
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\end{verbatim}
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\item \textbf{Description} : Generates a \verb-n- bits two inputs multiplexer with an output power of \verb-d- named \verb-modelname-.
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\item \textbf{Terminal Names} :
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\begin{itemize}
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\item \textbf{cmd} : select ( 1 bit )
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\item \textbf{i0} : input ( \verb-n- bits )
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\item \textbf{i1} : input ( \verb-n- bits )
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\item \textbf{q} : output ( \verb-n- bits )
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\item \textbf{vdd} : power
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\item \textbf{vss} : ground
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\end{itemize}
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\item \textbf{Parameters} : Parameters are given in the map \verb-param-.
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\begin{itemize}
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\item \textbf{nbit} (mandatory) : Defines the size of the generator
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\item \textbf{nbit\_cmd} (mandatory) : Defines the size of the generator
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\item \textbf{drive} (optional) : Defines the output power of the gates
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\begin{itemize}
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\item Valid drive are : 2 or 4
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\item If this parameter is not defined, it's value is the smallest one permitted
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\end{itemize}
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\item \textbf{physical} (optional, default value : False) : In order to generate a layout
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\item \textbf{behavioral} (optional, default value : False) : In order to generate a behavior
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\end{itemize}
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\item \textbf{Behavior} :
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\begin{verbatim}
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nq <= WITH cmd SELECT i0 WHEN '0',
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i1 WHEN '1';
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\end{verbatim}
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\item \textbf{Example} :
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\begin{verbatim}
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from stratus import *
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class inst_mux2 ( Model ) :
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def Interface ( self ) :
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self.in1 = SignalIn ( "in1", 8 )
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self.in2 = SignalIn ( "in2", 8 )
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self.cmd = SignalIn ( "cmd", 1 )
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self.o = SignalOut ( "o", 8 )
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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 ( 'DpgenMux2', 'mux2_8'
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, param = { 'nbit' : 8
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, 'physical' : True
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}
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)
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self.I = Inst ( 'mux2_8', 'inst'
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, map = { 'i0' : self.in1
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, 'i1' : self.in2
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, 'cmd' : self.cmd
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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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\end{verbatim}
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\end{itemize}
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