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Recover Microchip PIC12F683 Locked MCU Flash Heximal is a process to unlock PIC12F683 secured microcontroller security fuse bit and copy firmware binary to new PIC12F683 microprocessor;

Adjustments to the internal oscillator block, using the OSCTUNE register, also affect the period of the FSCM by the same factor. This can usually be neglected, as the clock frequency being monitored is generally much higher than the sample clock frequency.

The FSCM will detect failures of the primary or second- ary clock sources only. If the internal oscillator block fails, no failure would be detected, nor would any action be possible to break off pic12f683 microcomputer security fuse bit.

Both the FSCM and the WDT are clocked by the INTRC oscillator. Since the WDT operates with a separate divider and counter, disabling the WDT has no effect on the operation of the INTRC oscillator when the FSCM is enabled.

As already noted, the clock source is switched to the INTOSC clock when a clock failure is detected when reverse engineering pic12f683 ic mcu firmware. Depending on the frequency selected by the IRCF2:IRCF0 bits, this may mean a substantial change in the speed of code execution.