Wednesday 16 March 2011

machine cycles of 8085 microprocessor

List the various machine cycles of 8085.

Each time the CPU executes an instruction, it takes a series of steps. The complete series of steps is called a machine cycle. A machine cycle can be divided into two smaller cycles. These are instruction cycle and execution cycle.

7 MACHINE CYCLES

Opcode fetch

Memory read

Memory write

I/O read

I/O write

interrupt acknowledge

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