[To Rita Wang] imx8mplus SD boot failure

[chen-wust]

Minimum system change point: Only the power domain of the clk and sdio pins of the SD card boot has been changed from 3.3v to 1.8v. SD card startup without any print information. Hope to get some advice and Pointers.

[Rita_Wang · Accepted solution]

You need to use the 1.8V both in the CPU and SD card side, have you use the same design with our reference board? Have you download image to your SD card success and with proper boot mode from SD cards?

[chen-wust]

In previous versions, booting with an sd card was normal, but previous versions used a voltage of 3.3V. Now the clk voltage of the circuit is 1.8v, which cannot be started normally. I am now using uuu boot mode and the kernel will not initialize the sd card properly after burning it. Now I feel that the sd card cannot support 3.3v voltage startup, thank you for your answer