SDR is an acronym that can contain many meanings which are listed below.
SDR – Single Data Rate, Store Data Register, Streaming Data Request
There may be many popular meanings for SDR with the most popular definition being that of Single Data Rate, Store Data Register, Streaming Data Request
Single Data Rate is not the only word formed from SDR. There are 2 more listed below.
- SDR is also derived from Store Data Register
- SDR is also derived from Streaming Data Request
More SDR Definitions
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Double Data Rate synchronous dynamic random access memory (or also known as DDR SDRAM) is a class of memory integrated circuits used in computers.
Compared to the preceding 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.[1][2]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 single data rate (SDR) SDRAM running at the same clock frequency, due to this double pumping.