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Driver support for MultiMediaCard(MMC)

Question asked by k.alex.002 on Jul 6, 2014
Latest reply on Jul 6, 2014 by Clive One

Hello,

I'm currently working on a data logger project that records raw sensor data to a flash memory. As the writing speed is the most crucial parameter in the design (> 10 MB/s) , my plan was to use an MMCplus(MultiMediaCard Plus) card with 8-bit wide interface and 48MHz clock speed. However, after going through the STM32Cube/STM32F4xx_DSP_StdPeriph_Lib drivers it seems that they lack support for MMC. Is this indeed that case or am I missing something?

After testing the existing SD drivers with a few class 10 SD cards it seems that it is hard to reach the 10MB/s mark with a 24MHz/4-bit interface (raw data, no file system).
Has anyone had any sucess reaching those high speeds on SD cards?

I am working with the STM32F427VI on a custom PCB.

Thank you in advance,
Alex

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