Specifications

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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