In the field of microprocessor what is DMA?why it is used?
Answers were Sorted based on User's Feedback
Answer / vivek gautam
DMA means Direct memory access ''for fast transfer of data
between I/O devices and Memory devices and does not involve
|Is This Answer Correct ?||41 Yes||4 No|
Answer / srinivas
DMA means Direct memory access, its used to get data's from
U can see that an DMA controller is used to get data's from
|Is This Answer Correct ?||28 Yes||7 No|
Answer / rahul
DMA basically used for speed up the data transfer
using DMA it is possible to get fast data.....
|Is This Answer Correct ?||20 Yes||4 No|
Answer / shankar
whn a text file is o/p to a disk drive, we are concerned
with transferring data from memeory to that drive. yet with
programmed or interrupt driven I/O approches tht data mst
be read from memeory into the cpu and then transffered to
the didk drive . the microproccessor is na
unnecessary "middleman" in this process with the result
that the transfer rate is decresed. the dma is approach is
to turn off the processor and let the disk drive access the
data file in memeory itself : a sort of direct memory
|Is This Answer Correct ?||12 Yes||3 No|
Answer / veer thakur
The transer of data between a fast storage device such as
magnetic disk and memory is often limited by the speed of
the CPU, by removing the CPU from the path and letting the
peripheral device manage the memory buses directly would
improve the speed of the transfer, this transfer technique
is called DIRECT MEMORY ACCESS(DMA)...
|Is This Answer Correct ?||6 Yes||1 No|
Answer / mitch
for fast tranfering data
|Is This Answer Correct ?||8 Yes||5 No|
Answer / satya narayana from tanuku
dma means direct memory access the dma controller raises
|Is This Answer Correct ?||6 Yes||3 No|
Answer / crazy
In practical DMA used to communication between the processor
and another without the need of interrupts. If there is no
interrupts obiviously speed also increase :)
|Is This Answer Correct ?||5 Yes||3 No|
Direct memory access (DMA) is a method of transferring data
between system memory and I/O devices without requiring
intervention by the microprocessor.DMA is more efficient
than programmed I/O, in which the microprocessor reads the
data from the sending device and then writes it to the
receiving device.In DMA data transfers, data can bypass the
system microprocessor as it moves between system memory and
I/O devices. DMA improves server performance because the
microprocessor does not have to interrupt its processing
activities to manage data transfers.
|Is This Answer Correct ?||1 Yes||0 No|
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