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DMA Controller


Posted by: seminar class
Created at: Thursday 21st of April 2011 11:53:35 PM
Last Edited Or Replied at :Friday 30th of November 2012 01:17:30 AM
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The Intel 82357 DMA Controller is used to perform DMA transfers. It comes with 40-pin package. The 82357 DMA Controller can provide service for a total of four different devices at once. For example, on 82357 DMA Controller might be handling transfers for two different CRT (Cathode Ray Tube) displays, a floppy-disk controller and a magnetic tape unit. Each device is assigned a channel in the 82357. By connecting several DMA chips together, any number of channels can be supported at once. The 82357 has registers to keep track of source and destination addresses, counts and masks, and comma..................[:=> Show Contents <=:]



ppt presentation on 8237 dma controller


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Created at: Thursday 29th of November 2012 11:00:51 AM
Last Edited Or Replied at :Friday 30th of November 2012 01:17:27 AM
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8237 dma cantroller :pin diagram,w..................[:=> Show Contents <=:]



DIRECT MEMORY ACCESS details


Posted by: seminar paper
Created at: Wednesday 14th of March 2012 04:59:28 AM
Last Edited Or Replied at :Wednesday 14th of March 2012 04:59:28 AM
technical seminar topic on dma , direct memory access dma and dma controlled i o seminar, seminar paper for dma memory ,
e first byte of the program and then write that byte to memory. Then it would do the same for the second byte, until it had loaded the entire program into memory.

implementing dma in a computer system

A DMA controller implements direct memory access in a computer system.

It connects directly to the I/O device at one end and to the system buses at the other end. It also interacts with the CPU, both via the system buses and two new direct connections.

data transfer using dma controller

To transfer data from an I/O device to memory, the DMA controller first sends a Bu..................[:=> Show Contents <=:]



DMA Controller


Posted by: seminar class
Created at: Thursday 21st of April 2011 11:53:35 PM
Last Edited Or Replied at :Friday 30th of November 2012 01:17:30 AM
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e field) every 60 seconds. Suppose we wish to display a black and white picture that has 256 horizontal and 240 vertical dots, which are either on or off. Such a medium-resolution picture is usually scanned once every field and thus twice every frame. In this way each dot will actually appear as a double dot on the screen, and the whole picture will be scanned 60 times a second. Now 256 by 240 dots will require 61440 bits of information or 7680 bytes. Scanning through all of these 60 times a second means that there is a little over 2 microseconds to scan each byte. Each time the byte is scanne..................[:=> Show Contents <=:]



vlsi project ideas


Posted by: electronics seminars
Created at: Friday 15th of January 2010 01:21:21 PM
Last Edited Or Replied at :Thursday 23rd of February 2012 01:25:25 AM
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gn of JPEG Image compression standard
f. Design of RS-232 System Controller
g. Design of 16 Point Radix-4 FFT (Fast Fourier Transform) Algorithm
h. Design of Triple Data Encryption Standard (DES)
i. Design of Floating Point Unit (FPU)
j. Design of Universal Asynchronous Receiver Transmitter (UART) “ 16550
k. Design of OFDM (Orthogonal Frequency Division Multiplexing) Transmitter
l. Design of a Reconfigurable Coprocessor for Redundant Radix-4 Arithmetic
m. Design of SRAM (Static Random Access Memory)
n. Design of Pseudo Random Binary Sequence (PRBS) and Linear Feedback S..................[:=> Show Contents <=:]



Direct Memory Access


Posted by: computer science crazy
Created at: Sunday 21st of September 2008 11:21:32 PM
Last Edited Or Replied at :Thursday 09th of February 2012 03:29:35 AM
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r by raising hold. After the processor completes the current
instruction, it tri-states the data, address, and control lines, and raises hold acknowledge (holda). Once the DMA controller sees holda, it knows it is free to use the bus...................[:=> Show Contents <=:]



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