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Chapter 2 - Microcontroller PIC16F84
especially in industrial environment where disturbances and instability of supply are an everyday
occurrence. To solve this problem we need to make sure that microcontroller is in a reset state
each time supply falls below the approved limit.
If, according to electrical specification, internal reset circuit of a microcontroller can not satisfy the
needs, special electronic components can be used which are capable of generating the desired
reset signal. Beside this function, they can also function in watching over supply voltage. If
voltage drops below specified level, a logical zero would appear on MCLR pin which holds the
microcontroller in reset state until voltage is not within limits that guarantee correct functioning.
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