Question Bank (1 mark) · Q5
Q.What is an intercept circuit?
Karnataka PUCTextbookShort· 1mImportance★★★★★est
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The interrupt circuit lets an event break into the running program so the CPU can service it at once.
Without interrupts the CPU would have to keep checking (polling) every device, wasting time. The interrupt circuit senses an interrupt request, saves the current program counter on the stack, transfers control to the interrupt service routine, and restores the program on return. The 8051 provides five such interrupt sources. …
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