Chapter 8. Exceptions and Interrupts
What Are Exceptions and Interrupts?
Exceptions are events that cause changes in program flow control outside a normal code sequence. When it happens, the program that is currently executing is suspended, and a piece of code associated with the event (the exception handler) is executed. The events could either be external or internal. When an event is from an external source, it is commonly known as an interrupt or interrupt request (IRQ). Exceptions and interrupts are supported in almost all modern processors. In microcontrollers, the interrupts can also be generated using on-chip peripherals or by software.
The software code that is executed when an exception occurs is called exception handler. If the exception ...
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