The first is DDR (Double Data Rate) signaling, which transfers data on both the rising and falling edges of the clock signal, doubling the data transmission rate, a technique commonly used in DRAMs.

• 第一项是的DDR （双倍数据速率）信令，数据传输上都上升和下降边缘的时钟信号，增加一倍，数据传输速率，技术，普遍使用的DRAM的。