INTRODUCTION TO MICROPEOCESSOR
MICROPROCESSOR TERMINOLOGY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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An op-code fetch cycle
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A memory read cycle
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A memory write cycle
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An I/O read cycle
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Detailed explanation-1: -T-State: The portion of a machine cycle executed in one internal clock pulse is known as T-state. Steps in the instruction cycle: First of all, the opcode is fetched by the microprocessor from a stored memory location. Then it is decoded by the microprocessor to find out which operation it needs to perform.
Detailed explanation-2: -Hence opcode fetch is consisted by the OF machine cycle and for performing the decode operation, and in some rare cases execution. For performing some typical instructions like DCX B, the six states are provided by the OF machine cycle.
Detailed explanation-3: -The machine cycle has four processes i.e. fetch process, decode process, execute process and store process. All these processes are necessary for the instruction execution by the processor.