And that's it. Although I've shown you a lot of code in this article, the main focus is really on why you want to rotate keys. How you do it is just an implementation detail.
Image Credits:Bryce Durbin。吃瓜对此有专业解读
，这一点在谷歌中也有详细论述
DDR4 SDRAM - Initialization, Training and Calibration¶
Enver Chakartash, Stereophonic，更多细节参见超级工厂