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<a name="Register-Names-11"></a>
<h4 class="subsubsection">9.28.2.3 Register Names</h4>
<a name="index-MSP-430-register-names"></a>
<a name="index-register-names_002c-MSP-430"></a>
<p>General-purpose registers are represented by predefined symbols of the
form ‘<samp>r<var>N</var></samp>’ (for global registers), where <var>N</var> represents
a number between <code>0</code> and <code>15</code>. The leading
letters may be in either upper or lower case; for example, ‘<samp>r13</samp>’
and ‘<samp>R7</samp>’ are both valid register names.
</p>
<a name="index-special-purpose-registers_002c-MSP-430"></a>
<p>Register names ‘<samp>PC</samp>’, ‘<samp>SP</samp>’ and ‘<samp>SR</samp>’ cannot be used as register names
and will be treated as variables. Use ‘<samp>r0</samp>’, ‘<samp>r1</samp>’, and ‘<samp>r2</samp>’ instead.
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