Define the dma controller interface, Electrical Engineering

Assignment Help:

Define the DMA controller interface.

A DMA controller interfaces along with a few peripherals which may request DMA. The controller chooses the priority of simultaneous DMA requests communicates along with the peripheral and the CPU, and gives memory addresses for data transfer. DMA controller generally used with 8088 is the 8237 programmable device.

The 8237 is actually a special-purpose microprocessor. Normally this appears as part of the system controller chip-sets. The 8237 is a 4-channel device type. All channels are dedicated to an exact peripheral device and able of addressing 64 K bytes section of memory.

1416_8237 microprocessor.png

8237 microprocessor


Related Discussions:- Define the dma controller interface

Usage of fixed bias, Usage: Because of the above inherent drawbacks, f...

Usage: Because of the above inherent drawbacks, fixed bias is seldom used in linear circuits (that is those circuits which use the transistor like a current source). Instead,

What do you mean by star topology, Q. What do you mean by Star Topology? ...

Q. What do you mean by Star Topology? Star Topology: In Star topology, all user nodes are connected to central node point that interconnects all individual users' links and nod

Illustrate about the digital televisions, Illustrate about the Digital tele...

Illustrate about the Digital televisions Microprocessor would be used to control the below features, for instance: - Automatically tuning into television stations - allow

For combined load calculate real power and reactive power, Q. A 6.6-kV line...

Q. A 6.6-kV line feeds two loads connected in parallel. Load A draws 100 kW at 0.6 lagging power factor, and load B absorbs 100 kVA at 0.8 lagging power factor. (a) For the comb

Explain indexed addressing in 8051, Probelm: (a) Explain indexed addre...

Probelm: (a) Explain indexed addressing in 8051. (b) How does the 8051 distinguish between a byte address and a bit address? (c) How do open-loop and closed loop appli

Transformer, how back emf is produced in transformer?

how back emf is produced in transformer?

Determine the highest value of voltage regulation, Q. A 25-kVA, 2200:220-V,...

Q. A 25-kVA, 2200:220-V, 60-Hz, single-phase transformer has an equivalent series impedance of 3.5 + j4.0  referred to the primary high- voltage side. (a) Determine the highest

Determine the memory access time, Question: (a) Explain the types of ha...

Question: (a) Explain the types of hazards in a 5 stage pipeline. (b) Describe the three RAW dependencies in the following instructions. i: R7←R12+R15 i + 1: R8←R7-R1

Determine the signal bandwidth and the amplitudes, Determine the signal ban...

Determine the signal bandwidth and the amplitudes, Computer Networking

Aerodynamic principles & aircraft design, Define the aircraft axes & degree...

Define the aircraft axes & degrees of freedom. Analyse the different maneuvers that can be done by an aircraft.

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