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Chapter 2 - Microcontroller PIC16F84

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2.6 Interrupts

Interrupts are a mechanism of a microcontroller which enables it to respond to some events at the

moment when they occur, regardless of what microcontroller is doing at the time. This is a very

important part, because it provides connection between a microcontroller and environment which

surrounds it. Generally, each interrupt changes the program flow, interrupts it and after executing an

interrupt subprogram (interrupt routine) it continues from that same point on.

One of the possible sources of an interrupt and how it affects the main program

Control register of an interrupt is called INTCON and is found at 0Bh address. Its role is to allow or

disallowed interrupts, and in case they are not allowed, it registers single interrupt requests through

its own bits.

INTCON Register

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