One microcontroller serves multiple external interrupts


Posted on Jul 14, 2012

In designing µC-based systems, you often face a situation in which the µC has to respond to an external event happening at an uncertain moment in time. One example is receiving an echo from an object in a pulse-range measuring system. In these situations, you would usually use an external interrupt. Unfortunately, low-end, small, inexpensive µCs have only one external-interrupt vector address, so the µC can execute only one interrupt-service routine.






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