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<title>DAC Output (Embedded Target for Freescale 9S12)</title>
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<td bgcolor="#ffe4b0" valign="baseline"><b>Embedded Target for
Freescale 9S12 microcontrollers<br>
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<a name="180531"><font color="#990000" size="+3">Digital-to-Analog
Converter </font></a><font><a name="180531"><font color="#990000"
size="+3">(DAC)</font></a></font>
<!-- FNAME:ADC Input --><a name="180531"></a><a
name="hc12_ADC_In_blkref"></a><!-- H2 --><a name="180533"></a><br>
<p><a name="180534"></a>Driver for Digital-to-Analog Converters (DAC)
unit on the protective board of the Dragon12.<br>
</p>
<a name="library"></a><!-- H2 --><a name="180535"></a>
<p><font color="#990000" size="+1"><b>Library</b></font><br>
</p>
<p><a name="180536"></a>Real-Time mc9S12 Toolbox<br>
</p>
<a name="description"></a><!-- H2 --><a name="180539"></a>
<p><font color="#990000" size="+1"><b>Description</b></font></p>
<p><font color="#990000" size="+1"><b><img src="mc9S12_dac_1.gif" alt=""
style="width: 107px; height: 70px;"></b></font><br>
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<p><a name="180540"></a>The DAC Output block gives access to the two
D/A converters on the protective circuit board of the Dragon12 (Analog
Devices AD5311).<br>
</p>
<!-- H2 --><a name="180541"></a>
<p><font color="#990000" size="+1"><b>Dialog Box</b></font><br>
</p>
<p><a name="180545"></a><img src="mc9S12_dac_2.gif" alt=""
style="width: 375px; height: 295px;"></p>
<dl>
<a name="182791"></a><dt><b>Sample time</b></dt>
<a name="180701"></a><dd>Sample time for the block. To set a correct,
hardware-achieveable sample time, you should use the <span
style="font-family: monospace;">display timing signals</span><code></code>
option described in <span style="text-decoration: underline;">Determining
the base sample rate</span>.</dd>
</dl>
<a name="183014"></a><b><br>
DAC channel</b>
<dl>
<a name="180701"></a><dd>Currently the protective circuit board of
the Dragon12 features two D/A converters, <code>DAC0</code> and <code>DAC1</code>.
This board has been developped at the <a
href="www.mecheng.adelaide.edu.au">School of Mechanical Engineering</a>
of the <a href="www.adelaide.edu.au">University of Adelaide</a>.
Please see the download section of our <a
href="www.mecheng.adelaide.edu.au/robotics/main.htm">robotics web page</a>
for further details (schematics, parts lists, etc.)<br>
</dd>
</dl>
<a name="183014"></a><b><br>
</b><b>Saturation level (block input)</b>
<dl>
<a name="180701"></a><dd>This value represents the model sided
full-scale value of the DAC. Block input signals above this threshold
will yield a full-scale output of 5 V. In other words, the <span
style="font-weight: bold;">Saturation level</span> defines the model
sided output range (0 - <span style="font-weight: bold;">Saturation
level</span>).<br>
</dd>
<dt><br>
</dt>
</dl>
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