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PORT B Interrupt

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Largely simplified block schematic to demonstrate where the PORT Interrupt (sometimes called IOC or Interrupt on Change) is located in the PIC 16F1937 Architecture:

PORT B External Interrupt:

• A logic level change on any combination of pins on PORTB can be configured to generate one and the same single interrupt.
• It can be configured to react to a rising or to a falling edge, or to both.
• When it is configured in Flowcode and a level change occurs on any of the selected input pins of Port B:
  • This will immediately stop the main program
  • The PORTB related macro is executed
  • After this PORTB macro is executed, the main program goes further where it had left before.

This will happen every time a level change is detected on one of the pins selected on PORTB.

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