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Interrupt On Change (IOC) in PIC Microcontrollers

The interrupt on change is a cool feature on microcontrollers. Like you guessed, the interrupt occurs when there is a state change in any of the port pin associated with this feature. In PIC microcontrollers, PORT B is has the Interrupt on Change feature. The controller jumps into the interrupt vector when there is a change in the state of any of the pins in the port. In my previous post on interfacing matrix keypad, we used the conventional polling …

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