https://goughlui.com/2014/01/02/project-read-collect-decode-sd-card-cid-register-data/
$ cat /sys/block/mmcblk1/device/cid<br>$ cat /sys/block/mmcblk1/device/csd
개발중인 장비에 사용중인 eMMC 의 ECSD Register Field Parameters 를 확인 하고 싶은데 이건 어찌해야 하나…?
The 512-byte extended card-specific data (ECSD) register
Hardware reset function : [162] Byte | 00h
he host can change the properties of modes segments using the SWITCH command.