Explain the working of direct memory access controller, Electrical Engineering

Assignment Help:

Explain the various modes in which DMAC works.

Working of Direct memory access controller:

The modes of operation has demand mode, block mode, single mode and cascade mode. Demand mode transfers data till an external EOP is input or till the DREQ input becomes inactive. Particular mode releases the HOLD after all byte of data transferred. Block mode automatically transfers the no. of bytes specified by the county register for the channel. Cascade mode is used while more than one 8237 is present into a system.


Related Discussions:- Explain the working of direct memory access controller

Power transistor, Power Transistor A power  transistor  is a three laye...

Power Transistor A power  transistor  is a three layer  PNP  or NPN  semiconductor device  having  two  junctions. Three  terminals of power  transistors are collector emitter

Find the new operating point in transistor, Q. A transistor in a fixed bias...

Q. A transistor in a fixed bias amplifier circuit was replaced by another transistor of beta equaling 150 instead of 60.if IB of transistor is equal to 100 microampere and collecto

Visual presentation of an electrical network, Visual Presentation of an Ele...

Visual Presentation of an Electrical Network: The second layer corresponds to the distribution network coverage. The low voltage system and customer supply points along with l

Radio hardware, Filters 1. You need to design a lowpass filter with cutoff ...

Filters 1. You need to design a lowpass filter with cutoff frequency Fc= 1MHz. a. What is the minimum filter order required for 30 dB rejection (-30 dB gain) of 10 MHz? b. What is

Transformer, 1 diagram basic layout of a simple transformer

1 diagram basic layout of a simple transformer

Explain the types of power plants, Explain in detail the various energy res...

Explain in detail the various energy resources and their availability. Explain the following: (a) Types of power plants (b) Selection of power Plants

Design a circuit using op-amp amplifier, Design a circuit using op-amp that...

Design a circuit using op-amp that will reject the 60kHz power line noise and also reject high signal frequency above 800Khz. The stop-band width around the 60kHz centre frequency

Explain relative data addressing mode, Explain relative data addressing mod...

Explain relative data addressing mode (with examples) available in microprocessors. Relative Mode: Operand supplied is an offset, not the actual address. Added the con

Find the voltage drops across the resistors, Consider the network shown in ...

Consider the network shown in Figure (a). (a) Find the voltage drops across the resistors and mark them with their polarities on the circuit diagram. (b) Check whether the KV

Oscilloscope, Describe in detail the construction and working of digital ty...

Describe in detail the construction and working of digital type oscilloscope.

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd