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* CPU speed is 4.8Mhz without the 8x divider when low fuse is 0x79
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* define F_CPU 4800000 CPU: 4.8MHz PWM: 9.4kHz ####### use low fuse: 0x79 #######
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* Above PWM speeds are for phase-correct PWM. This program uses Fast-PWM,
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* which when the CPU is 4.8MHz will be 18.75 kHz
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* I use these fuse settings
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* (flash-noinit.sh has an example)
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* (check bin/flash*.sh for recommended values)