没人答啊，自己顶个！！

难道米有人知道吗？？？

SD卡协议规范看了，SD卡控制器协议规范看了，没找到！！

那为啥手机上标注最大支持32G SD卡？？

官方文档，都是英文的很蛋疼，你要是要，我就发给你~~

Only hosts that are compliant to the Physical Layer Specification Version 2.00 or later and the File 
System Specification Ve r2.00 or higher can access High Capacity SD Memory Cards and Extended 
Capacity SD Memory Cards. Other hosts fail to initialize High Capacity SD Memory Cards and 
Extended Capacity SD Memory Cards.  
Only hosts that are compliant to  the Physical Layer Specification Version 3.00 or higher and the File 

System Specification Ver3.00 or later (exFAT supported) can access Extended Capacity SD Memory.

与sd卡主的协议版本和sd卡的文件系统都有关系，以上是英文资料！！！

High Capacity SD Memory Card (SDHC) : More than 2GB and up to and including 32GB 
Extended Capacity SD Memory Card (SDXC): More than 32GB and up to and including 2TB 

擦，协议上说的！！

你不信，去找个8G SD卡，放在兼容1.1协议上边，能全部寻址吗？？

擦，协议上说的！！

你不信，去找个8G SD卡，放在兼容1.1协议上边，能全部寻址吗？？

谁不文明了？？