Read-and-write memory, Electrical Engineering

Assignment Help:

Q. Read-and-write memory?

Writing is the same as storing data intomemory and reading is the same as retrieving the data later. RAM is said to be volatile because its contents are retained only as long as power is present. A RAM device is a collection of 2n addressable storage locations, each of which contains k bits. Its block diagram is shown in Figure, in which each cell may be a flip-flop or a capacitor, and n address lines are decoded to select k cells. A static RAM, in which each cell is a flip-flop, is the read-and-write memory that retains its data so long as the power is applied, without any further action needed from the computer. Static RAMis used in microprocessor-based systems requiring small memory. Common static-RAMsizes are 2K × 8, 8K × 8, and 32K × 8, where K stands for 210 = 1024. A dynamic RAM, in which each cell is a capacitor (which leaks charges and therefore requires continuous refreshing from the computer to maintain its value), is the read-and-write memory that is used in large memory systems due to its lower cost and greater density. Common dynamic-RAMpackages are available in 16K-bit, 64K-bit, 256K-bit, and 1M-bit (whereMstands for mega = 220 ) sizes.

2051_Read-and-write memory.png


Related Discussions:- Read-and-write memory

Data analysis in gis, Data analysis in GIS: Therefore, GIS consists of...

Data analysis in GIS: Therefore, GIS consists of the following: 1.  Database - for storage and retrieval of information. The database forms the foundation of the GIS syst

Wireless and communication, With a maximum excess delay of and a chip durat...

With a maximum excess delay of and a chip duration of , the multipath components fall in delay bins. This means that we experience leakage of energy between chips and the channel i

Multiplexer, design a 32:1 multiplexer using two 16:1 multiplexer

design a 32:1 multiplexer using two 16:1 multiplexer

Digital signal processing, A DT LTI system has the following impulse respon...

A DT LTI system has the following impulse response: h(n)=[cos(pi/+delta(n)] u(n-3)u(n-2) (a) Find the system’s frequency response h(e^jw ). (b) Sketch the magnitude and phase respo

Common-emitter configuration, Common-emitter configuration: The commo...

Common-emitter configuration: The common-emitter that is abbreviated as CE transistor configuration is displayed in figure.  The transistor terminal common to both the input

Illustrates power dissipation management in embedded system, Illustrates ab...

Illustrates about the power dissipation management in embedded system? Power Dissipation Management a. Clever real-time programming through Wait and Stop instructions b.

Power system, what is speed governing frenqency control

what is speed governing frenqency control

Power distribution, Power Distribution You will study about the legisl...

Power Distribution You will study about the legislative measures that have been taken by our government to address these challenges. In particular, we discuss the Energy Conse

Software defined radio and modulation recognition, As we all know the next ...

As we all know the next century demand for wireless technology is expected to be the commercial implementation of Software Defined Radio (SDR) paradigm to improve base station effi

Wireless and communication, With a maximum excess delay of and a chip durat...

With a maximum excess delay of and a chip duration of , the multipath components fall in delay bins. This means that we experience leakage of energy between chips and the channel i

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