DDR Training

DDR Training Motivation:As the clock frequency runs higher, the width of the data eye becomes narrower to sample data (channel signal integrity and jitter contribute to data eyereduction).

DDR training is introduced to remove static skew/noise so that the data eye is kept wider for better data sampling.

DDR Training动机：
随着时钟频率升高，数据眼的宽度变得更窄以采样数据（通道信号完整性和抖动有助于减少数据眼）。

引入了DDR Training以消除静态偏斜/噪声，从而使数据眼保持更大的范围，以进行更好的数据采样。