Updated some of the HTML command reference documentation to reflect
changes just made in the "extract" and "extresist" commands.
This commit is contained in:
R. Timothy Edwards
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55eadcfb90
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@ -42,9 +42,11 @@ Circuit netlist extractor
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<DL>
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<DT> <B>capacitance</B>
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<DD> Extract local parasitic capacitance values to substrate
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<DT> <B>resistance</B>
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<DD> Extract lumped resistance values. Note that this
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is <I>not</I> the same as full parasitic resistance.
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<DT> <B>coupling</B>
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<DD> Extract the parasitic coupling capacitance between
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nodes.
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<DT> <B>lumped</B>
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<DD> Extract lumped resistance values.
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The values extracted are "lumped" resistance and
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indicate the value for which the delay through the
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net can be computed with R times C, where R is the
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@ -55,9 +57,10 @@ Circuit netlist extractor
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command. Lumped resistances have no meaning in
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SPICE netlists and will only be used when running
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<B>ext2sim</B> to generate a .sim netlist.
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<DT> <B>coupling</B>
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<DD> Extract the parasitic coupling capacitance between
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nodes.
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Prior to magic version 8.3.597, this option was
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<B>resistance</B>, but as that was often confused
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with full parasitic resistance extraction, it has
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been changed.
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<DT> <B>length</B>
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<DD> Extract the length of the shortest path from a driver
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to a receiver, for computing more accurate parasitic
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@ -73,7 +76,7 @@ Circuit netlist extractor
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array instances, is guaranteed to be strictly positive.
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<DT> <B>all</B>
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<DD> Apply all standard options (does not include options
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"local", "labelcheck", or "aliases").
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"local", "labelcheck", "aliases", or "resistance").
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<DT> <B>local</B>
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<DD> Write all .ext files to the current working directory.
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If not specified, each .ext file will be placed in the
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@ -109,6 +112,18 @@ Circuit netlist extractor
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Note the difference: "extract unique" is a command that
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runs immediately, and cannot be undone;
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"extract do unique" is an option setting for "extract".
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<DT> <B>resistance</B>
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<DD> (Added in magic version 8.3.597) This setting replaces
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the use of the standalone command "extresist". The
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effect is the same: Magic performs full R-C extraction,
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generating a <TT>.res.ext</TT> file that annotates the
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existing <TT>.ext</TT> file (see the "extresist" command
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documentation). The "extresist" command options can
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still be used to set options such as tolerance for the
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R-C extraction.
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Note that prior to magic version 8.3.597, this option
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name would produce the lumped resistance approximation
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(see <B>lumped</B>, above).
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</DL>
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</BLOCKQUOTE>
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These options (except for "local") determine how much
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@ -223,7 +238,9 @@ Circuit netlist extractor
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<I>Warning:</I> This operation immediately modifies the
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existing layout in preparation for extraction. Label
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modifications are permanent, and cannot be undone. All
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cells in the hierarchy may potentially be modified. <BR>
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cells in the hierarchy may potentially be modified. To avoid
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this issue, use the "extract do unique" option instead (see
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above). <BR>
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<DT> <B>warn</B> [[<B>no</B>] <I>option</I>]
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<DD> Enable/disable reporting of non-fatal errors, where <I>option</I>
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may be one of the following:
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@ -92,17 +92,25 @@ information.
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The <B>extresist</B> command provides a method for generating
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a more detailed model of resistance, in which long network
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routes and branching routes are replaced with resistor devices
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and device networks. <P>
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and device networks. This is known as "full R-C extraction". <P>
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Using <B>extresist</B> is a multi-step process. It is first
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necessary to run both <B>extract</B> and <B>ext2sim</B> to get
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the initial netlist (with lumped, not detailed, resistances).
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After a <TT>.sim</TT> file has been generated, the
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<B>extresist all</B> command may be run. The output is
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Using <B>extresist</B> as a standalone command is a multi-step
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process. It is first necessary to run <B>extract</B> to get
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the initial netlist.
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After a <TT>.ext</TT> file has been generated, the
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<B>extresist</B> command may be run. The output is
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a file <TT>.res.ext</TT> for each cell in the hierarchy.
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Finally, with the option <B>extresist on</B> set,
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<B>ext2sim</B> or <B>ext2spice</B> will generate the final,
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detailed simulation file. <P>
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Finally, with the option <B>extresist on</B> set, <B>ext2spice</B>
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will generate the final, detailed simulation file. <P>
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Prior to magic version 8.3.597, it was also necessary to run
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<B>ext2sim labels on</B> and <B>ext2sim</B> to write out a
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<TT>.sim</TT> and a <TT>.node</TT> file before running
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<B>extresist</B>. This is no longer necessary. There is since
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magic version 8.3.597 an option <B>extract do resistance</B>
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that runs the resistance extraction in sequence with the regular
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extraction, producing both the <TT>.ext</TT> and <TT>.res.ext</TT>
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files.
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More details on using <B>extresist</B> can be found in
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<B>magic</B> Tutorial number 8.
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@ -117,6 +125,7 @@ information.
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<BLOCKQUOTE>
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<A HREF=extract.html><B>extract</B></A> <BR>
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<A HREF=ext2sim.html><B>ext2sim</B></A> <BR>
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<A HREF=ext2spice.html><B>ext2spice</B></A> <BR>
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</BLOCKQUOTE>
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<P><IMG SRC=graphics/line1.gif><P>
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