https://blog.wongcw.com/2022/07/28/%e8%8f%af%e9%82%a6%e7%99%bc%e5%b8%83lpddr4-4x-100bga%e5%b0%81%e8%a3%9d%e5%ad%98%e5%84%b2%e9%a1%86%e7%b2%92%e6%bb%bf%e8%b6%b3jedec%e7%af%80%e8%83%bd%e6%b8%9b%e7%a2%b3%e6%a8%99%e6%ba%96/