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When can a user program execution be interrupted?
It won't be desirable to interrupt a program when an instruction is being executed and is in a state such as instruction decode. The most desirable place for program interruption will be when it has completed the prior instruction and is about to begin a new instruction. Figure below shows instruction execution cycle with interrupt cycle where interrupt situation is acknowledged. Please remember that even interrupt service routine is also a program and after recognizing interrupt next instruction executed by instruction cycle is first instruction of ISR (interrupt servicing routine).
In applications where the required memory capacity cannot be satisfied by a single available memory IC chip, what should the designer do to meet this requirement? Ans: If th
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What are the steps in executing the program? 1.Fetch 2.Decode 3.Execute 4.Store
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