[digg=http://digg.com/programming/AVR_Fuse_Bits_for_clock_selection] VIMP NOTE: fuse bit = 0 => fuse bit is PROGRAMMED fuse bit = 1 => fuse bit is UN-PROGRAMMED Fuse bits configuration is required when one has to change default factory setting of clock (internal/external) to desired setting. This is most important thing and setting fuse bits incorrectly may render microcontroller useless. Let …