2022-03-06 23:09:47 +00:00
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<title>AVRDUDE: 4.4 Other Notes</title>
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<a name="Other-Notes"></a>
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<table class="header" cellpadding="1" cellspacing="1" border="0">
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<tr><td valign="middle" align="left">[<a href="avrdude_9.html#Configuration-File" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_12.html#Instruction-Format" title="Previous section in reading order"> < </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_9.html#Configuration-File" title="Up section"> Up </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_14.html#Programmer-Specific-Information" title="Next section in reading order"> > </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_14.html#Programmer-Specific-Information" title="Next chapter"> >> </a>]</td>
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<td valign="middle" align="left"> </td>
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<td valign="middle" align="left"> </td>
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<td valign="middle" align="left"> </td>
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<td valign="middle" align="left"> </td>
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<td valign="middle" align="left">[<a href="avrdude.html#Introduction" title="Cover (top) of document">Top</a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
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<td valign="middle" align="left">[Index]</td>
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<td valign="middle" align="left">[<a href="avrdude_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
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</tr></table>
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<a name="Other-Notes-1"></a>
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<h2 class="section">4.4 Other Notes</h2>
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<ul>
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<li>
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The <code>devicecode</code> parameter is the device code used by the STK500
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and is obtained from the software section (<code>avr061.zip</code>) of
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Atmel’s AVR061 application note available from
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<a href="http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf">http://www.atmel.com/dyn/resources/prod_documents/doc2525.pdf</a>.
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</li><li>
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Not all memory types will implement all instructions.
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</li><li>
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AVR Fuse bits and Lock bits are implemented as a type of memory.
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</li><li>
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Example memory types are: <code>flash</code>, <code>eeprom</code>, <code>fuse</code>,
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<code>lfuse</code> (low fuse), <code>hfuse</code> (high fuse), <code>efuse</code>
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(extended fuse), <code>signature</code>, <code>calibration</code>, <code>lock</code>.
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</li><li>
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The memory type specified on the AVRDUDE command line must match one of
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the memory types defined for the specified chip.
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</li><li>
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The <code>pwroff_after_write</code> flag causes AVRDUDE to attempt to power
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the device off and back on after an unsuccessful write to the affected
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memory area if VCC programmer pins are defined. If VCC pins are not
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defined for the programmer, a message indicating that the device needs a
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power-cycle is printed out. This flag was added to work around a
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problem with the at90s4433/2333’s; see the at90s4433 errata at:
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<p> <a href="http://www.atmel.com/dyn/resources/prod_documents/doc1280.pdf">http://www.atmel.com/dyn/resources/prod_documents/doc1280.pdf</a>
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</p>
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</li><li>
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The boot loader from application note AVR109 (and thus also the AVR
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Butterfly) does not support writing of fuse bits. Writing lock bits
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is supported, but is restricted to the boot lock bits (BLBxx). These
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are restrictions imposed by the underlying SPM instruction that is used
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to program the device from inside the boot loader. Note that programming
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the boot lock bits can result in a “shoot-into-your-foot” scenario as
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the only way to unprogram these bits is a chip erase, which will also
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erase the boot loader code.
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<p>The boot loader implements the “chip erase” function by erasing the
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flash pages of the application section.
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</p>
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<p>Reading fuse and lock bits is fully supported.
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</p>
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</li></ul>
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<hr>
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<table class="header" cellpadding="1" cellspacing="1" border="0">
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<tr><td valign="middle" align="left">[<a href="avrdude_9.html#Configuration-File" title="Beginning of this chapter or previous chapter"> << </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_12.html#Instruction-Format" title="Previous section in reading order"> < </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_9.html#Configuration-File" title="Up section"> Up </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_14.html#Programmer-Specific-Information" title="Next section in reading order"> > </a>]</td>
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<td valign="middle" align="left">[<a href="avrdude_14.html#Programmer-Specific-Information" title="Next chapter"> >> </a>]</td>
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</tr></table>
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2022-03-12 23:31:27 +00:00
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