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define flash memoryit is an approach same to eeprom technology a flash cell is based on a one transistor controlled by trapped charge just like an
what is cache memoryit is a small fast memory that is inserted among large slower main memory and the processor it decreases the memory access
explain flash devicesit is possible to read the contents of a one cell but it is only possible to write an whole block of cellsgreater density which
what are advantages and disadvantages of using eepromthe benefits are that eeprom do not have to be removed for erasure also it is possible to delete
what are disadvantages of epromthe chip must be physically removed from the circuit for reprogramming and its whole contents are erased by the uv
why eprom chips are mounted in packages that have transparent windowsince the erasure needs dissipating the charges trapped in the transistors of
what are the features of promthey are programmed directly by the userfasterless expensivemore flexible
define romit is a non-volatile memory it includes only reading of stored
what are rimmrdram chips can be assembled into larger modules known as rimm it can hold up to 16
what are the special features of direct rdramit is a two channel rambus it has 18 data lines intended to transfer two bytes of data at a time there
what are rdramrdram are rambus dram rambus needs specially designed memory chips these chips use cell arrays based on the standard dram technology
what is ram bus technologythe key feature of ram bus technology is a fast signalling method used to transfer information among chips instead of using
what is memory controllera memory controller is a circuit which is interposed among the processor and the dynamic memory it is used for performing
what are simm and dimmsimm are single in-line memory module dimm is dual in-line memory modules such modules are an assembly of various memory chips
what is mother boardmother board is a main system printed circuit board which having the processor it will occupy an unacceptably large amount of
what is double data rate sdram double data rates sdram are those which can transfer data on both edges of the clock and their bandwidth is
define bandwidthwhen transferring blocks of data it is of interest to know how much time is required to transfer an entire block as blocks can be
what is synchronous dramsynchronous drams are those whose operation is directly synchronized with a clock
what is asynchronous dramin asynchronous dram the timing of the memory device is controlled asynchronously a specialized memory controller circuit
define memory latencyit is used to refer to the amount of time it takes to transfer a word of data to or from the
define refresh circuitsit is a circuit which make sure that the contents of a dram are maintained when every row of cells are accessed
what are the characteristics of dramlow costhigh densityrefresh circuitry is
what are the characteristics of sramsram are fastthey are volatilethey are of high costless
why sram are said to be volatilebecause their contents are lost when power is interrupted so sram are said to be
what are the characteristics of semiconductor ram memories they are available in a wide range of speeds their cycle time range from 100ns to less