57 lines
1.9 KiB
TeX
57 lines
1.9 KiB
TeX
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\begin{itemize}
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\item Name : DpgenRom4 -- 4 words ROM Macro-Generator
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\item Description : Generates a \verb-n- bits 4 words optimized ROM named \verb-modelname-.
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\item Terminal Names :
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\begin{itemize}
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\item sel1 : upper bit of the address of the value (input, 1 bit)
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\item sel0 : lower bit of the address of the value (input, 1 bit)
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\item q : the selected word (output, \verb-n- bits)
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\item vdd : power
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\item vss : ground
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\end{itemize}
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\item Parameters : Parameters are given with a map called \verb-param-.
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\begin{itemize}
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\item nbit : Defines the size of the generator
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\item val0 : Defines the first word
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\item val1 : Defines the second word
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\item val0 : Defines the third word
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\item val1 : Defines the fourth word
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\end{itemize}
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\item Behavior :
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\begin{verbatim}
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q <= WITH sel1 & sel0 SELECT contsVal0 WHEN B"00",
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contsVal1 WHEN B"01",
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contsVal2 WHEN B"10",
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constVal3 WHEN B"11";
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\end{verbatim}
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\item Example :
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\begin{verbatim}
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class myClass ( Model ) :
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def Interface ( self ) :
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self._sel0 = LogicIn ( "sel0", 1 )
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self._sel1 = LogicIn ( "sel1", 1 )
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self._q = LogicOut ( "dataout", 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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Inst ( 'DpgenRom4'
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, param = { 'val0' : "0b1010"
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, 'val1' : "0b1100"
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, 'val2' : "0b1111"
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, 'val3' : "0b0001"
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, 'nbit' : 4
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}
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, map = { 'sel0' : self._sel0
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, 'sel1' : self._sel1
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, 'q' : self._q
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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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\end{verbatim}
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\end{itemize}
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