In the field of microprocessor what is DMA?why it is used?

Answer Posted / 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
access.

Is This Answer Correct ?    12 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

What are the applications of fm transceiver.

607


Explain what is angle and amplitude modulation? What is noise in modulation?

562


By referring to the barkhausen criterion and conventional circuit's analysis,show that for the Wein Bridge oscillator to oscillate,the voltage gain (Av) of the op amp must be set to 3 and the feedback ratio must be 1/Av.. Anyone, please help me!

3007


How many such pairs of digits are there in the word " strive" each of which has as many letters between them in the word as they are in english alphabets?

2107


Define peak inverse voltage?

637






What is the difference between xdm 100, 300, 1000, 2000

1218


What is the difference between edge triggered flip flop and level triggered flip flop?

545


how do link aT1 from the 1st BTS to 2nd BTS4?

1601


i am using LM7805 for my project in which 12v dc supply is given.how should i calculate the values of C0 and C1?

1384


Give the typical value of bias current for ca741 operational amplifier.

574


Compare csi and vsi?

844


What is the difference between generator differential protection and transformer differential protection??

1689


define voltage regulator.

544


hi, This is manglam.I have done BE(E&TC). I have been selected for icici po interview on 7th sept.So what type of questions they may ask? If u have any interview questions , plz mail me(vickymanglam@gmail.com). are the gd topics always related with economics?

1855


i want to know some description about SIM architecture... what is inside the SIM?

1426