Watch Free Classes
GATE CSE IT » DDR full form
Prepare for GATE & ESE

DDR full form

Read this article to know about the full form of DDR, its key features, characteristics, applications, advantages, and disadvantages.

Table of Content

DDR stands for Double data rate. It is a computing technology in which a universal serial bus transmits data at a double rate by delivering data at the rising and falling sides of a clock cycle. This approach allows for the transmission of two signals every clock cycle.

One transfer per clock cycle is the most basic approach to creating an electrical circuit (the SDR technique uses this). This necessitates changing the clock signal twice every cycle. Signal integrity constraints restrict the clock frequency while operating at high bandwidth. The data packets operate with the same limiting rate but double the overall communicated data by utilising both sides of the clock. It was an upgraded version of SDRAM that sent data using an SDR mechanism.

Table of Contents

  1. Working of DDR
  2. Key features of DDR :
  3. Characteristics of DDR
  4. Advantages of DDR
  5. Disadvantages of DDR
  6. Applications of DDR

Working of DDR

Making a timed electrical circuit do one transfer every clock cycle is the simplest method to construct it (rise and fall). It is used in the SDR method. However, this step needs the clock signal to be changed twice every cycle, but the data lines can only change once per cycle. As a result, when it works at a greater bandwidth, its clock frequency is limited by signal integrity constraints. Both clock edges allow the data signals to run at a comparable limiting frequency while doubling their transmission rate.

Key features of DDR

  1. It achieves an excellent balance of transfer rate, cost, and power consumption.
  2. It performs well because it is speedier and more efficient.
  3. It recognises and corrects errors using ECC and CRC. It is employed to ensure memory reliability.
  4. It also offers the automatic self-refresh operation, which is temperature dependent.
  5. It is a great option for many applications, including high-performance computing, supercomputers, and smaller power-constrained mobile devices.

Characteristics of DDR:

  1. Data is sent twice every cycle (wave/clock), once at the rising and once at the falling edges of a clock cycle.
  2. DDR SDRAM technology uses less energy than earlier SDRAM modules, which grew 3.3 volts as opposed to DDR SDRAM’s 2.6 volts every clock cycle.
  1. DDR works at the same rate as that of the clock cycle.

Advantages DDR :

  • Higher transmission speeds are attained.
  • decreases the number of cycles necessary to complete a task, Reduces the cost of the components required
  • Allows for computer devices with a reduced form size.

DDR disadvantages:

  • Slower than QDR (quad data rate) approach
  • Devices that use the DDR approach generate higher heat.

DDR applications:

This technology is widely used in applications needing high data transmission rates, such as:

  • The process is widely used in manufacturing volatile components for computers (RAM). It is typically called DDR SDRAM (double data rate synchronous dynamic random access memory). The approach was so successful in the field that it was incorporated in successive iterations of technology under the names DDR2 SDRAM, DDR3 SDRAM, and DDR4 SDRAM.
  • The method, known as GDDR, is used to add volatile storage capacity in Graphics Chips (graphic cards) (graphics double data rate). Which technology is designed to function with video cards?
  • Analogue-to-digital converters use it.
  • Used in the bus of some microprocessors (AMD’s Athlon64 series), providing quicker data transfer to and from the CPU.

Related links

Trending Topics

practicewithpyqs_gate
Download previous years papers
.