the sdio of stm32u595 can not work at 128MHz or higher SDIO clock frequency

[Yang Yang]

Hello, ST experts

 

STM32U595VJT6 is used on our own HW design. There is external SD3.0 compliant level translator NVT4857UK to help to work on UHSI mode. Everything is fine when SDIO clock sets as 96MHz or lower. But when the SDIO clock is higher than about 100MHz, the program which derived from cubemx stalls at  HAL_SD_Init() . Is there any idea about this?

BTW, the SD card can support UHS-I, and read speed can reach 80MB/s when attached to PC.

 

BR

Yang

 

[TDK]

Max clock speeds are given in the reference manual for a variety of modes. Ensure you are not exceeding them for the mode you select.