RCEN fuse programmer with AT90S1200A

  
As you know the AT90S1200 microcontroller include an internal RC oscillator that is disabled by default. If you want to change it (enable or disable) you must to program it with parallel mode. The most programmers working with serial mode and its not possible to program this fuse bit (RCEN). With this stand-alone programmer you can now enable or disable the internal RC oscillator that is working at ~1MHz.
RCEN fuse programmer with AT90S1200A - schematic




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