https://blog.wongcw.com/2023/04/07/nand%e5%92%8cdram%e7%94%a2%e6%a5%ad%e9%81%ad%e9%81%87%e9%9b%99%e9%87%8d%e6%9a%b4%e6%93%8a-%e6%a5%ad%e7%b8%be%e5%89%b5%e4%b8%8b2009%e5%b9%b4%e4%bb%a5%e4%be%86%e6%96%b0%e4%bd%8e/