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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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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 scanned it has to be fetched from memory. This would be a complete waste of time for the processing power of the ..................[:=> Show Contents <=:]



Butterfly valve


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:01:41 PM
Last Edited Or Replied at :Saturday 20th of September 2008 12:01:41 PM
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est right pedal in the drivers footwell (although adaptions for hand control do exist). This is why the accelerator pedal in some countries is called a throttle pedal...................[:=> Show Contents <=:]



MegaSquirt


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 12:00:34 PM
Last Edited Or Replied at :Saturday 20th of September 2008 12:00:34 PM
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ects, including:
MegaJoltLite “ an ignition system controller for the Ford Enhanced Distributorless Ignition System (EDIS)
UltraMegaSquirt “ an integrated fuel injection and ignition controller..................[:=> Show Contents <=:]



VTEC


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:59:36 AM
Last Edited Or Replied at :Wednesday 13th of February 2013 08:48:58 AM
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ntrol) is a system developed by Honda to improve the combustion efficiency of its internal combustion engines throughout the RPM range. This was the first system o..................[:=> Show Contents <=:]



ball valve


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:57:34 AM
Last Edited Or Replied at :Saturday 20th of September 2008 11:57:34 AM
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s blocked. The handle position lets you 'see' the valve's position.

Ball valves are durable and usually work to achieve perfect shutoff even after years of disuse. They are therefore an excellent choice for shutoff applications (and are often preferred to globe valves and gate valves for this purpose). They do not offer the fine control that may be necessary in throttling applications but are sometimes used for this purpose.

The body of ball valves may be made of metal, ceramic, or plastic. The ball may be chrome plated to make it more durable.

There are three general types of ball va..................[:=> Show Contents <=:]



VANOS Variable Nockenwellen Steuerung


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:56:59 AM
Last Edited Or Replied at :Sunday 29th of September 2013 05:23:13 AM
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movement varies from 6degrees of advanced to 6degrees of retarded camshaft timing. BMW recently began offering 'double' VANOS, which operates on the exhaust camshaft as well, on a number of its cars...................[:=> Show Contents <=:]



Gasoline direct injection or GDI


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:55:43 AM
Last Edited Or Replied at :Saturday 26th of June 2010 08:03:19 AM
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output-power, the engine power is governed by modulating fuel injection, like a diesel engine; as opposed to restricting intake airflow, like a conventional gas internal combustion engine...................[:=> Show Contents <=:]



Valvetronic


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:55:16 AM
Last Edited Or Replied at :Saturday 20th of September 2008 11:55:16 AM
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of rocker arms, called intermediate arms (lift scaler), positioned between the valve stem and the camshaft. These intermediate arms are able to pivot on a central point, by means of an extra, electronicly actuated camshaft. This movement alone, without any movement of the intake camshaft, can open or close the intake valves.

Because the intake valves now have the ability to move from fully closed to fully open positions, and everywhere in between, the primary means of engine load control is transferred from the throttle plate to the intake valvetrain. By eliminating the throttle plate's 'bo..................[:=> Show Contents <=:]



BlueTec


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:52:33 AM
Last Edited Or Replied at :Monday 26th of January 2015 04:23:38 AM
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model year...................[:=> Show Contents <=:]



List of mechanical Seminar topics4


Posted by: computer science crazy
Created at: Saturday 20th of September 2008 11:52:04 AM
Last Edited Or Replied at :Wednesday 12th of November 2014 10:46:52 AM
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more details...
/Flying on Water
Applications Of Nanotechnology
EURO V
Piezoelectric Actuators
Electric Cylinders
Visualization and Computer-Aided Design
Thermo Acoustic Refrigeration
Technology-Based Entrepreneurship
Turbofan Engines
Underwater Welding
Directed Energy
mechanosynthesis
Super Air Nozzles
Finite Element Analysis
Diffusion Flame Shapes And Thin Filament Diagnostics
Boosting Gas Turbine Energy Efficiency
Flexible Manufacturing Systems
Iontophoresis
Perpetual Motion Machines
Advanced Cooling Systems
Hydrogen Production using Nuclear Energy
Modern..................[:=> Show Contents <=:]



ppt presentation on 8237 dma controller


Posted by:
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
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#FF4500]DIRECT MEMORY ACCESS




introduction

An important aspect governing the Computer System performance is the transfer of data between memory and I/O devices.

Direct memory access (DMA) is a means of having a peripheral device control a processor's memory bus directly.

computer system with dma

Consider a typical system consisting of a CPU ,memory and one or more input/output devices as shown in fig. Assume one of the I/O devices is a disk drive and that the computer must load a program from this drive into memo..................[:=> 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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60 times a second means that there is a little over 2 microseconds to scan each byte. Each time the byte is scanned it has to be fetched from memory. This would be a complete waste of time for the processing power of the CPU.
For the computer to be efficient, it needs special circuitry to read these bytes. One solution is to store these bytes in a special display memory with built-in scanning circuitry and an arbitration scheme between the memory accesses by the scanning circuitry and memory accesses by the CPU. (This solution is mostly used today by the use of Video RAM – VRAM.) This is s..................[:=> 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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tion Set Computer) Processor
ll. Design of AES (Advanced Encryption Standard) Encryption and Decryption Algorithm with 128-bits Key Length
mm. Design and Implementation of USB 2.0 Transceiver Macro-cell Interface (UTMI)
nn. Design and Implementation of Lossless DWT/IDWT (Discrete Wavelet Transform & Inverse Discrete Wavelet Transform) for Medical Images
oo. Design of an Open Core Protocol (OCP) IP Block
pp. Design and Implementation of Reversible Watermarking for JPEG2000 Standard
qq. Design and Implementation of Adaptive Viterbi Decoder
rr. Design and Implementation of 10/100 Mb..................[:=> 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 :Wednesday 28th of January 2015 02:30:17 PM
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is to provide a signal to tell the processor to remove itself from the bus so there is no contention on the memory control, address, or data lines.

This is the entire concept behind direct memory access (DMA). To complete our picture, it is important to note that there are actually several ways that DMA can be done. In particular, there are three common choices:-

burst mode DMA :- In burst mode the DMA controller transfers an entire block of data without interruption. During the time of the transfer, the DMA controller retains complete control of the processor's bus.

Cycle Stealing :-..................[:=> Show Contents <=:]



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