Which of the following expansions matches the acronym DDR?

Which of the following expansions matches the acronym DDR?

• A. Dynamic Data Rate
• B. Double Data Rate
• C. Data Rate Density
• D. Dual Data Rate

Answer: (B)

DDR is shorthand for Double Data Rate. The idea behind this term is that data is transferred on both edges of the memory clock—rising and falling—so two data transfers occur each cycle. This doubles the amount of data moved per clock without needing to increase the clock frequency, which is why the technology is called “double data rate.” The other phrases don’t reflect the standard terminology used for this memory feature: Dynamic Data Rate isn’t the established name, Data Rate Density isn’t used to describe this mechanism, and Dual Data Rate isn’t the conventional term you’ll see in documentation and specs.

DDR is shorthand for Double Data Rate. The idea behind this term is that data is transferred on both edges of the memory clock—rising and falling—so two data transfers occur each cycle. This doubles the amount of data moved per clock without needing to increase the clock frequency, which is why the technology is called “double data rate.” The other phrases don’t reflect the standard terminology used for this memory feature: Dynamic Data Rate isn’t the established name, Data Rate Density isn’t used to describe this mechanism, and Dual Data Rate isn’t the conventional term you’ll see in documentation and specs.