East Germany: Abbr.

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Possible Answers: DDR.

Last seen on: NY Times Crossword 19 Jun 2018, Tuesday

Random information on the term “DDR”:

In computing, a computer bus operating with double data rate (DDR) transfers data on both the rising and falling edges of the clock signal.[page needed] This is also known as double pumped, dual-pumped, and double transition. The term toggle mode is used in the context of NAND flash memory.

The simplest way to design a clocked electronic circuit is to make it perform one transfer per full cycle (rise and fall) of a clock signal. This, however, requires that the clock signal changes twice per transfer, while the data lines change at most once per transfer. When operating at a high bandwidth, signal integrity limitations constrain the clock frequency. By using both edges of the clock, the data signals operate with the same limiting frequency, thereby doubling the data transmission rate.

This technique has been used for microprocessor front side busses, Ultra-3 SCSI, graphics RAM (the AGP bus and GDDR), main memory (both RDRAM and DDR1 through DDR4), and the HyperTransport bus on AMD’s Athlon 64 processors. It is more recently being used for other systems with high data transfer speed requirements – as an example, for the output of analog-to-digital converters (ADCs).

DDR on Wikipedia