distrib/docxml2/text/doc/hitas_reference/stmFormat.xml

   1 <?xml version="1.0" encoding="ISO-8859-1" ?>
   2 <section niv='2'><title>STM - The Models Format</title>
   3
   4 <section niv='3'><title>Description</title>
   5
   6 <p>The STM format is used by the timing analyzer &tool; to report delay and slope models. The file has the extension .stm.</p>
   7
   8 </section>
   9
  10 <section niv='3'><title>Articles</title>
  11
  12 <p>The STM file contains a header and a list of models. These models are delay and slope models.
  13 Models refer to timing arcs and timing paths.</p>
  14 <list>
  15 <article>A model may be:</article>
  16 <item>a 1 or 2 dimension lookup table</item>
  17 <item>a Current Source Model (SCM) containing parameters enabling delay and slope computation</item>
  18 </list>
  19 <p>lookup table model:</p>
  20 <code>
  21 <cl>model (</cl>
  22 <cl>   name (modelname)</cl>
  23 <cl>   vth (value) #measure threshold</cl>
  24 <cl>   vdd (value) #power supply</cl>
  25 <cl>   vt (value)  #vt transistor</cl>
  26 <cl>   vf (value)  #final voltage</cl>
  27 <cl>   spline (                             # 2D table</cl>
  28 <cl>      input_slope_axis (value value value)</cl>
  29 <cl>      load_axis (value value value)</cl>
  30 <cl>      data (                      #        load</cl>
  31 <cl>         (value value value)      #      ---------&gt;</cl>
  32 <cl>         (value value value)      # slope|</cl>
  33 <cl>         (value value value)      #      |</cl>
  34 <cl>      )                           #      V</cl>
  35 <cl>   )</cl>
  36 <cl>)</cl>
  37 </code>
  38 <p>"SCM" model:</p>
  39 <code>
  40 <cl>model (</cl>
  41 <cl>   name (modelname)</cl>
  42 <cl>   vth (value) #measure threshold</cl>
  43 <cl>   vdd (value) #power supply</cl>
  44 <cl>   vt (value)  #vt transistor</cl>
  45 <cl>   vf (value)  #final voltage</cl>
  46 <cl>   scm_dual (</cl>
  47 <cl>      dual (</cl>
  48 <cl>         (&lt;list_of_parameter_names&gt;)</cl>
  49 <cl>         (&lt;list_of_parameter_values&gt;)</cl>
  50 <cl>      )</cl>
  51 <cl>   )</cl>
  52 <cl>   noise_scr(val) #noise parameter</cl>
  53 <cl>)</cl>
  54 </code>
  55 <glossary>
  56 <row><article>pconf0, pconf1:</article><def>conflict capacitance parameters</def></row>
  57 <row><article>capai:</article><def>intrinsic capacitance</def></row>
  58 <row><article>irap:</article><def>currant ratio</def></row>
  59 <row><article>vddin:</article><def>input voltage</def></row>
  60 <row><article>vt:</article><def>vt transistor</def></row>
  61 <row><article>threshold:</article><def>measure threshold</def></row>
  62 <row><article>imax:</article><def>max currant</def></row>
  63 <row><article>an, bn:</article><def>specifical parameters</def></row>
  64 <row><article>vddmax:</article><def>power supply</def></row>
  65 <row><article>rsat:</article><def>saturation resistance</def></row>
  66 <row><article>rlin:</article><def>linear resistance</def></row>
  67 <row><article>drc:</article><def>intrinsic RC delay</def></row>
  68 </glossary>
  69 <list>
  70 <article>Four kinds of SCM models exist:</article>
  71 <item>scm_dual</item>
  72 <item>scm_good</item>
  73 <item>scm_false</item>
  74 <item>scm_path</item>
  75 </list>
  76 <p>scm_good model example:</p>
  77 <code>
  78 <cl>scm_good (</cl>
  79 <cl>   link_out (</cl>
  80 <cl>      (ci cf k3 k4 k5)</cl>
  81 <cl>      (val val val val val)</cl>
  82 <cl>   )</cl>
  83 <cl>   link_dual (</cl>
  84 <cl>      (ci cf acti bcti)</cl>
  85 <cl>      (val val val val)</cl>
  86 <cl>   )</cl>
  87 <cl>   dual (</cl>
  88 <cl>      (&lt;list_of_parameter_names&gt;)</cl>
  89 <cl>      (&lt;list_of_parameter_values&gt;)</cl>
  90 <cl>   )</cl>
  91 <cl>)</cl>
  92 </code>
  93 <p>scm_false model example:</p>
  94 <code>
  95 <cl>scm_false (</cl>
  96 <cl>   link_out (</cl>
  97 <cl>      (ci cf k3 k4 k5)</cl>
  98 <cl>      (val val val val val)</cl>
  99 <cl>   )</cl>
 100 <cl>   false (</cl>
 101 <cl>      (pconf0 pconf1 rtot kf vddmax)</cl>
 102 <cl>      (val val val val val)</cl>
 103 <cl>   )</cl>
 104 <cl>)</cl>
 105 </code>
 106 <p>scm_path model example:</p>
 107 <code>
 108 <cl>scm_path (</cl>
 109 <cl>   link_out (</cl>
 110 <cl>      (ci cf k3 k4 k5)</cl>
 111 <cl>      (val val val val val)</cl>
 112 <cl>   )</cl>
 113 <cl>   path (</cl>
 114 <cl>      (pconf0 vddmax)</cl>
 115 <cl>      (val val)</cl>
 116 <cl>   )</cl>
 117 <cl>)</cl>
 118 </code>
 119
 120 </section>
 121
 122 <section niv='3'><title>Units</title>
 123
 124 <p>Unless otherwise stated, all capacitances are given in Femto-farads and all times are given in picoseconds.</p>
 125
 126 </section>
 127 </section>