inst_s46.htm

来自「ST20 Embedded Toolset R2.0.5用于开发基于ST20芯片」· HTM 代码 · 共 79 行

HTM
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<html>

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<title>devlb</title>

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<!--
	span.Signal { text-transform: uppercase; font-family: Verdana }
-->
</STYLE>

</head>

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<blockquote>
<h2>
  <a name="1219757"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">devlb</font>
</h2><hr>


<p>
  <a name="1219758"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">device load byte</font>
</p>


<h3>
  <a name="1219759"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Code</font>
</h3>


<p>
  <a name="1219760"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">2F F0</font>
</p>


<h3>
  <a name="1219761"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Description</font>
</h3>


<p>
  <a name="1219762"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">Perform a device read from memory, a memory-mapped device or a peripheral. The byte addressed by <span class=Signal>Areg</span> is read into <span class=Signal>Areg</span> as an unsigned value. The memory access performed by this instruction is guaranteed to be correctly sequenced with respect to other device-access instructions. Also, the instruction is guaranteed to be executed after all normal memory load instructions that appear before it in the code sequence, and before all normal memory loads that appear later.</font>
</p>


<h3>
  <a name="1219763"> </a><font color="#003366"  face="Verdana, Arial, Helvetica, sans-serif">Definition</font>
</h3>


<p>
  <a name="1219764"> </a><font size=2  face="Verdana, Arial, Helvetica, sans-serif">if ( <em>PeripheralStart</em> <font face=symbol>

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