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• DDR_SDRAM abstract "Double data rate synchronous dynamic random-access memory (DDR SDRAM) is a class of memory integrated circuits used in computers. DDR SDRAM, also called DDR1 SDRAM, has been superseded by DDR2 SDRAM and DDR3 SDRAM, neither of which is either forward or backward compatible with DDR1 SDRAM -meaning that DDR2 or DDR3 memory modules will not work in DDR1-equipped motherboards, and vice versa.Compared to single data rate (SDR) SDRAM, the DDR SDRAM interface makes higher transfer rates possible by more strict control of the timing of the electrical data and clock signals. Implementations often have to use schemes such as phase-locked loops and self-calibration to reach the required timing accuracy. The interface uses double pumping (transferring data on both the rising and falling edges of the clock signal) to lower the clock frequency. One advantage of keeping the clock frequency down is that it reduces the signal integrity requirements on the circuit board connecting the memory to the controller. The name "double data rate" refers to the fact that a DDR SDRAM with a certain clock frequency achieves nearly twice the bandwidth of a SDR SDRAM running at the same clock frequency, due to this double pumping.With data being transferred 64 bits at a time, DDR SDRAM gives a transfer rate of (memory bus clock rate) × 2 (for dual rate) × 64 (number of bits transferred) / 8 (number of bits/byte). Thus, with a bus frequency of 100 MHz, DDR SDRAM gives a maximum transfer rate of 1600 MB/s."Beginning in 1996 and concluding in June 2000, JEDEC developed the DDR (Double Data Rate) SDRAM specification (JESD79)." JEDEC has set standards for data rates of DDR SDRAM, divided into two parts. The first specification is for memory chips, and the second is for memory modules.".
• DDR_SDRAM thumbnail Generic_DDR_Memory_(Xytram).jpg?width=300.
• DDR_SDRAM wikiPageExternalLink www.jedec.org.
• DDR_SDRAM wikiPageID "8922".
• DDR_SDRAM wikiPageRevisionID "605242548".
• DDR_SDRAM hasPhotoCollection DDR_SDRAM.
• DDR_SDRAM subject Category:JEDEC_standards.
• DDR_SDRAM subject Category:SDRAM.
• DDR_SDRAM type Abstraction100002137.
• DDR_SDRAM type JEDECStandards.
• DDR_SDRAM type Measure100033615.
• DDR_SDRAM type Standard107260623.
• DDR_SDRAM type SystemOfMeasurement113577171.
• DDR_SDRAM comment "Double data rate synchronous dynamic random-access memory (DDR SDRAM) is a class of memory integrated circuits used in computers.".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR SDRAM".
• DDR_SDRAM label "DDR-SDRAM".
• DDR_SDRAM label "ذاكرة دي.دي.آر اس.دي.رام".
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR-SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR-SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM sameAs m.02gl4.
• DDR_SDRAM sameAs Q333914.
• DDR_SDRAM sameAs Q333914.
• DDR_SDRAM sameAs DDR_SDRAM.
• DDR_SDRAM wasDerivedFrom DDR_SDRAM?oldid=605242548.
• DDR_SDRAM depiction Generic_DDR_Memory_(Xytram).jpg.
• DDR_SDRAM homepage www.jedec.org.
• DDR_SDRAM isPrimaryTopicOf DDR_SDRAM.