随机存储器，分为静态和动态两种。主要用于数据存储，掉电数据丢失。 SRAM（Static Random Access Memory）： 静态随机存储器，这种存储器只要保持通电，存储的数据就不会丢失，掉电后所有数据丢失。这种内存容量不能做得很大，制造成本也较高，但是速度很快。

DDR SDRAM（Double Data Rate Synchronous Dynamic Random Access Memory，双数据率同步动态随机存储器）通常被我们称为DDR，其中的“同步”是指内存工作需要同步时钟，内部命令的发送与数据传输都以它为基准。DDR是一种掉电就丢失数据的存储器件，并且需要定时的刷新 ...

The recently introduced DDR3 SDRAM technology paves the way to higher data rates (from 800 Mbps to 1600 Mbps) and provides higher performance for many systems that depend on data, video, or packet ...

Almost everyone knows that the bulk of DRAMs produced end up in desktop and laptop computers just like the one used to write this article. In fact, approximately 90% of all DRAMs produced are used in ...

These design guidelines provide the best practices for DDR and DDR2 SDRAM custom memory interface implementation in Stratix III and Stratix IV FPGAs. Figure 1 shows the design flow that is required ...

Representing the most recent generation of double-data-rate (DDR) SDRAM memory, DDR4 and low-power LPDDR4 together provide improvements in speed, density, and power over DDR3. However, such speed and ...

At its simplest, RAM (Random Access Memory) is a type of computer memory, often referred to as short-term memory because it is volatile, meaning that the data is not saved when the power is turned off ...

This is a two-part article that focuses on the design guidelines and describes how to implement DDR or DDR2 external memory interfaces (EMIFs) using FPGAs via ALTDLL and ALTDQ_DQS megafunctions. This ...

We often see “logic analyzer” projects which are little more than microcontrollers reading data as fast as they can, sending it to a PC, and then plotting the results. Depending on how fast the ...

There are many parameters, both electrical and physical, that contribute to the relative size of tDV and not all scale with operating speed. Factors such as signal noise, crosstalk, skew, jitter, and ...

We have covered what is RAM briefly previously. At its simplest, RAM (Random Access Memory) is a type of computer memory, often referred to as short-term memory because it is volatile, meaning that ...

Micron generated a good 13.6 billion US dollars in revenue from September to the end of November. This is the second consecutive company record. By early 2025, the company would have been the world's ...