INTRODUCTION TO COMPUTERS
COMPUTER SYSTEMS AND COMPONENTS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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At which step of F-D-E cycle, does the CPU refer to its Instruction Set Table?
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Fetch step
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Decode step
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Execute step
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All through F-D-E cycle
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Explanation:
Detailed explanation-1: -The second phase of the instruction cycle is called a Decode Phase . The control unit of the CPU decodes the program instruction once it is fetched into the instruction register ( IR ) .
Detailed explanation-2: -The essential idea of the FDE cycle is that instructions are fetched from RAM decoded executed by the CPU.
Detailed explanation-3: -To execute an instruction, the processor copies the instruction code from the program memory into the instruction register (IR). It can then be decoded (interpreted) by the instruction decoder, which is a combinational logic block which sets up the processor control lines as required.
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