i.MX ProcessorsのトピックRe: imx6q boot from emmc failed

imx6q boot from emmc failed

yacheng_zhang — Mon, 15 May 2023 06:37:09 GMT

Hello, technical support:

I made a imx6q board,When emmc works at 52m clock, it can't start properly. Manually modified to 13m clock, I can read and write the file correctly.

Here is my schematic diagram of the circuit,I tried to add resistance on the CLK line, but it didn't work.

Who can tell me where my problem is.

thank you

Re: imx6q boot from emmc failed

Rita_Wang — Mon, 15 May 2023 08:47:10 GMT

When you using the 52m, how about the log file of the board boot up?

Re: imx6q boot from emmc failed

yacheng_zhang — Fri, 19 May 2023 07:13:42 GMT

Maybe I found some reasons. I used emmc5.1. the official board was emmc4.44. Is there a difference between the voltage configuration of the imx6q? Do you have a reference circuit for the emmc5.1 chip with imx6q．

I tested the voltage of the emml clk only 2.0v.but the official board was 3.3v.what caused the difference.

Re: imx6q boot from emmc failed

Rita_Wang — Tue, 23 May 2023 09:19:46 GMT

The design is the same, here which version BSP are you using?