Extended Data Out Random Access Memory

Extended Data Out Random Access Memory. DescriptionPrinciples of OperationApplicationReferencesUsually another type of dynamic memory is mentioned alongside EDO DRAM which is called FMP DRUM In the evolution of the dynamic memory EDO DRUM holds a higher position as it is a more upgraded version Unlike the usual memory with the page organization (the abovementioned FMP DRAM) the randomaccess memory is equipped with the additional set of latch registers that make it possible for the data to be stored even during the next query Such an effect can be achieved on FPM DRAMonly in the addressinterleave mode In any memory access there are three phases 1 Getting access 2 Data becomes valid 3 The actual data transfer These phases are repeated in sequence for each cell when reading the line In case of EDO memory the time parameters including the operational speed are improved due to the exclusion of waiting cycles in the phase of data availability Typical data access times are 45 50 60 and 70 ns of speed The reduction of access time in EDOcircuits is due to the exclusion of waiting for data availability on the data line in the process of accessing memory It was achieved by converting the normal sequence of operations in paging mode to the “twostage command pipe” which allows the overlapping of some operations Thus the new memory access cycle begins before the end of the previous cycle ie before the data is deleted from the data line Data that is read from a particular address is “captured” by special registers of memory circuits (data output drivers) and is stored in the data line until the end of memory access cycle Along with the data output for the control of which there’s an additional control signal in the memory circuit there’s data selection in the new address Moreover the independence of the new data selection process from the readiness of the previous results is preserved even when the request is interrupted As a result of the improvements introduced on the c FMP DRAM devices were rather popular and spread in various devices in 1980s and the first half of 1990s Then in the late &#3990s there was a new type of DRAM EDO In its structure there was a new signal output (OE) which helped to control the buffer output from the CAS signal to the original signal Reading data from EDOoutput could be done during a long time after the CAS signal hence the name “extended signal” It can be used in pipelined systems to block the access where the next cycle begins before the data from the previous cycle is deleted from the data line EDO DRAM is primarily used with the Intel Pentium processors starting with the slower older versions with no significant work speed (the beginning of the application in 1995) In order to make the work more productive using EDOin the Pentium processors they use for example chipsets Triton HX EDO DRAM has successfully replaced FMP on the PC market Its capacity is higher so EDO is in priority However after a wh Forum CIT [Electronic resource]V3 Dynamic RAM/ Retrieved 10052016 Mode of access http//citforumru/hardware/memory/mem_0203shtmlHiT [Electronic resource] Dynamic RAM/ Retrieved 10052016 Mode of access http//allhtru/inf/pc/mem_dramhtml#23Forum CIT [Electronic resource] Program optimization technique/ Retrieved 10052016 Mode of access http//citforumru/book/optimize/ramshtmlTechopedia [Electronic resource] Extended Data Out(EDO)/ Retrieved 10052016 Mode of access https//wwwtechopediacom/definition/11439/extendeddataoutedo.

Extended data out random access memory (EDO RAM/DRAM) is an early type of dynamic random access memory (DRAM) chip which was designed to improve the performance of fast page mode DRAM (FPM DRAM) that was used in the 1990s Its main feature was that it eliminated wait times by allowing a new cycle to start while retaining the data output buffer from the previous cycle active which allows a.

What is Extended Data Out Random Access Memory (EDO RAM

Extended data out random access memory (EDO RAM/DRAM) is an early type of dynamic random access memory (DRAM) chip which was designed to improve the performance of fast page mode DRAM (FPM DRAM) that was used in the 1990s Its main feature was that it eliminated wait times by allowing a new cycle to start while retaining the data output buffer from the previous cycle active which allows a degree of pipelining (overlap in operation) that improved performance.

Extended Data Out Dynamic Random Access Memory from FOLDOC

Extended Data Out Dynamic Random Access Memory (EDO DRAM EDO RAM) A type of DRAM designed to access nearby memory locations faster than FPM DRAM Extended Data Out DRAM (EDODRAM) allows the data outputs to be kept active after the CAS\ signal goes inactive using an additional signal OE\ to control the data outputs.