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Requesting Assistance with eMMC HS200 Mode on STM32MP135

Raj_Bhuvanesh
Associate

Hi Team,

 

We're currently facing challenges enabling HS200 mode for the eMMC in our STM32MP135 project. We'd appreciate your assistance in resolving these issues:

 

Clock Speed Discrepancy: In CubeMX, we've configured the SDMMC1 and SDMMC2 clocks to 200 MHz. However, the observed output clock for the SDMMC (eMMC) interface is only 130 MHz.

 

Delay Block Implementation: The reference manual mentions the use of a delay block. Could you please elaborate on how to implement this block to achieve the desired HS200 mode?

 

If I set vmmc and vqmmc to 3.3V and 1.8V in the DTS, I encounter errors during the flashing process. Error messages are displayed while flashing.

 

For your reference, we've attached screenshots of our current Device Tree Source (DTS) configuration and the terminal output. Please review these and advise if there are any missing elements or configurations.

 

Thank you

Raj

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