INTRODUCTION TO MICROPEOCESSOR
MICRO PROCESSOR AND MICRO CONTROLLER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Direct transfer of data between memory and accumulator
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Direct transfer of data between memory and I/O devices without the use of microprocessor
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Transfer of data exclusively within the microprocessor registers
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Fast Transfer of data between I/O devices and microprocessor
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Detailed explanation-1: -During the DMA (Direct Memory Access) Transfer, the microprocessor is in an idle state. Hence It will not perform any operations like read the data or write the data. Therefore, during DMA transfer, DMA controller transfers data directly between the I/O module and main memory.
Detailed explanation-2: -Explanation: DMA is an approach of performing data transfers in bulk between memory and the external device without the intervention of the processor.
Detailed explanation-3: -Direct Memory Access (DMA) transfers the block of data between the memory and peripheral devices of the system, without the participation of the processor. The unit that controls the activity of accessing memory directly is called a DMA controller. The processor relinquishes the system bus for a few clock cycles.