Differences

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--- flash_the_atmega [2013/10/20 10:58] – [Three different storage areas] breaker27
+++ flash_the_atmega [2013/11/17 14:06] – [Strange avrdude error messages] breaker27
@@ Line 34: / Line 34: @@
 (replace ?? by the hex value for the needed fuse settings and use "lfuse", "hfuse" or "efuse" accordingly).
+===== Strange avrdude error messages =====
+Some fuses only use a part of their bits. If you set such a fuse, avrdude may complain at verification that it read out another value than it wrote.
+Writing the EFuse of the ATMega168 or 328 returns a value of only the last 3 bits (upper 5 unused), so a value of xxxxxyyy is read out as 00000yyy. Example:
+<code>
+avrdude: verification error, first mismatch at byte 0x0000
+xfc != 0x04
+avrdude: verification error; content mismatch
+</code>
+Don't worry. The warning is only returned because avrdude does not know that the upper 5 bits are always 1 (as per spec).
 ====== Flashing the firmware / eeprom ======