coriolis/stratus1/doc/dpgen/man_dpgenmux2.tex

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2010-07-12 10:33:22 -05:00
\begin{itemize}
\item \textbf{Name} : DpgenMux2 -- Multiplexer Macro-Generator
\item \textbf{Synopsys} :
\begin{verbatim}
Generate ( 'DpgenMux2', modelname
, param = { 'nbit' : n
, 'drive' : d
, 'physical' : True
, 'behavioral' : True
}
)
\end{verbatim}
\item \textbf{Description} : Generates a \verb-n- bits two inputs multiplexer with an output power of \verb-d- named \verb-modelname-.
\item \textbf{Terminal Names} :
\begin{itemize}
\item \textbf{cmd} : select ( 1 bit )
\item \textbf{i0} : input ( \verb-n- bits )
\item \textbf{i1} : input ( \verb-n- bits )
\item \textbf{q} : output ( \verb-n- bits )
\item \textbf{vdd} : power
\item \textbf{vss} : ground
\end{itemize}
\item \textbf{Parameters} : Parameters are given in the map \verb-param-.
\begin{itemize}
\item \textbf{nbit} (mandatory) : Defines the size of the generator
\item \textbf{nbit\_cmd} (mandatory) : Defines the size of the generator
\item \textbf{drive} (optional) : Defines the output power of the gates
\begin{itemize}
\item Valid drive are : 2 or 4
\item If this parameter is not defined, it's value is the smallest one permitted
\end{itemize}
\item \textbf{physical} (optional, default value : False) : In order to generate a layout
\item \textbf{behavioral} (optional, default value : False) : In order to generate a behavior
\end{itemize}
\item \textbf{Behavior} :
\begin{verbatim}
nq <= WITH cmd SELECT i0 WHEN '0',
i1 WHEN '1';
\end{verbatim}
\item \textbf{Example} :
\begin{verbatim}
from stratus import *
class inst_mux2 ( Model ) :
def Interface ( self ) :
self.in1 = SignalIn ( "in1", 8 )
self.in2 = SignalIn ( "in2", 8 )
self.cmd = SignalIn ( "cmd", 1 )
self.o = SignalOut ( "o", 8 )
self.vdd = VddIn ( "vdd" )
self.vss = VssIn ( "vss" )
def Netlist ( self ) :
Generate ( 'DpgenMux2', 'mux2_8'
, param = { 'nbit' : 8
, 'physical' : True
}
)
self.I = Inst ( 'mux2_8', 'inst'
, map = { 'i0' : self.in1
, 'i1' : self.in2
, 'cmd' : self.cmd
, 'q' : self.o
, 'vdd' : self.vdd
, 'vss' : self.vss
}
)
def Layout ( self ) :
Place ( self.I, NOSYM, Ref(0, 0) )
\end{verbatim}
\end{itemize}