COMPUTER SCIENCE AND ENGINEERING
COMPUTER ARCHITECTURE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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fetch
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decode
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execute
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None of the above
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Detailed explanation-1: -The control unit decodes the instruction (decides what it means) and directs that the necessary data be moved from memory to the arithmetic/logic unit. These first two steps together are called instruction time, or I-time.
Detailed explanation-2: -During the decode stage, the control unit (CU) will decode the instruction in the CIR. The CU then sends signals to other components within the CPU, such as the arithmetic logic unit (ALU) and the floating point unit (FPU).
Detailed explanation-3: -Microcontroller Operation 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.
Detailed explanation-4: -The value for instruction is fetched out of this given location within the memory; after being fetched just according to the execution instruction definition, decoding and executing follow suit. After this instruction is executed, the processor again turns to the program counter. It gets a new instruction.