Question

In 805 an external interrupt 1 vector address is of and causes of interrupt if

Answer 1

Explanation:

The most powerful and important features are interrupts in 8051 microcontroller. In most of the real-time processes, to handle certain conditions properly, the actual task must be halt for some time – it takes required action – and then must return to the main task. For executing such type of programs, interrupts are necessary. It entirely differs from the polling method wherein the processor must check sequentially each device and ask whether the service is required or not while consuming more processor time.

Interrupts in 8051 microcontroller

Interrupts in 8051 microcontroller are more desirable to reduce the regular status checking of the interfaced devices or inbuilt devices. Interrupt is an event that temporarily suspends the main program, passes the control to a special code section, executes the event-related function and resumes the main program flow where it had left off.