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| <title>Using as: AVR-Regs</title> |
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| Next: <a href="AVR_002dModifiers.html#AVR_002dModifiers" accesskey="n" rel="next">AVR-Modifiers</a>, Previous: <a href="AVR_002dChars.html#AVR_002dChars" accesskey="p" rel="prev">AVR-Chars</a>, Up: <a href="AVR-Syntax.html#AVR-Syntax" accesskey="u" rel="up">AVR Syntax</a> [<a href="index.html#SEC_Contents" title="Table of contents" rel="contents">Contents</a>][<a href="AS-Index.html#AS-Index" title="Index" rel="index">Index</a>]</p> |
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| <a name="Register-Names-4"></a> |
| <h4 class="subsubsection">9.5.2.2 Register Names</h4> |
| |
| <a name="index-AVR-register-names"></a> |
| <a name="index-register-names_002c-AVR"></a> |
| |
| <p>The AVR has 32 x 8-bit general purpose working registers ‘<samp>r0</samp>’, |
| ‘<samp>r1</samp>’, ... ‘<samp>r31</samp>’. |
| Six of the 32 registers can be used as three 16-bit indirect address |
| register pointers for Data Space addressing. One of the these address |
| pointers can also be used as an address pointer for look up tables in |
| Flash program memory. These added function registers are the 16-bit |
| ‘<samp>X</samp>’, ‘<samp>Y</samp>’ and ‘<samp>Z</samp>’ - registers. |
| </p> |
| <div class="smallexample"> |
| <pre class="smallexample">X = <span class="roman">r26:r27</span> |
| Y = <span class="roman">r28:r29</span> |
| Z = <span class="roman">r30:r31</span> |
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