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- <html>
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- <title>NOT Gate</title>
- </head>
- <body bgcolor="FFFFFF">
- <h1><img align="center" src="../../../icons/notGate.gif" width="32" height="32"> <em>NOT Gate</em></h1>
- <p><table>
- <tr><td><strong>Library:</strong></td>
- <td><a href="index.html">Gates</a></td></tr>
- <tr><td><strong>Introduced:</strong></td>
- <td>2.0 Beta 1</td></tr>
- <tr><td valign="top"><strong>Appearance:</strong></td>
- <td valign="top"><table><tbody>
- <tr><th align="left">Shaped:</th><td><img src="../../../img-libs/not-shaped.png" width="34" height="16"></td></tr>
- <tr><th align="left">Rectangular:</th><td><img src="../../../img-libs/not-rect.png" width="34" height="21"></td></tr>
- </tbody></table></td></tr>
- </table></p>
- <h2>Behavior</h2>
- <p>The NOT Gate emits the complement of whatever input
- it receives.
- The truth table for a NOT gate is the following.</p>
- <center><table>
- <tr><th><var>x</var></th><th>out</th></tr>
- <tr><td align="center">0</td><td align="center">1</td></tr>
- <tr><td align="center">1</td><td align="center">0</td></tr>
- </table></center>
- <p>If the input is unspecified (i.e., floating), then the output will also be
- unspecified - unless the "Gate Output When Undefined" option is "Error for
- undefined inputs," in which case the output is an error. If the input is an
- error value, then the output will also be.</p>
- <p>A multi-bit NOT gate will perform the above transformation bitwise on
- its input.</p>
- <h2>Pins (assuming component faces east)</h2>
- <dl>
- <dt>West edge (input, bit width according to Data Bits attribute)
- <dd>The component's input.
- <dt>East edge (output, bit width according to Data Bits attribute)
- <dd>The output, whose value is the complement of the input value.
- </dl>
- <h2>Attributes</h2>
- <p>When the component is selected or being added,
- Alt-0 through Alt-9 alter its <q>Data Bits</q> attribute
- and the arrow keys alter its <q>Facing</q> attribute.</p>
- <dl>
- <dt>Facing</dt>
- <dd>The direction of the component (its output relative to its input).</dd>
- <dt>Data Bits</dt>
- <dd>The bit width of the component's input and output.</dd>
- <dt>Gate Size</dt>
- <dd>Determines whether to draw a larger or a smaller version of the
- component.</dd>
- <dt>Output Value</dt>
- <dd>Indicates how false and true results should be translated into output values.
- By default, false is indicated by a low voltage (0) and true by a high voltage (1),
- but one or the other can be replaced by a high-impedance (<q>floating</q>) value
- instead. This allows wired-or and wired-and connections, as illustrated in
- the <a href="basic.html">AND/OR/NAND/NOR Gate documentation</a>.</dd>
- <dt>Label</dt>
- <dd>The text within the label associated with the gate.</dd>
- <dt>Label Font</dt>
- <dd>The font with which to render the label.</dd>
- </dl>
- <h2>Poke Tool Behavior</h2>
- <p>None.</p>
- <h2>Text Tool Behavior</h2>
- <p>Allows the label associated with the gate to be edited.</p>
- <p><a href="../index.html">Back to <em>Library Reference</em></a></p>
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