AnsweredAssumed Answered

SD card 4 bit mode

Question asked by chobin on Oct 8, 2015
Latest reply on Oct 8, 2015 by jeremyzhou

Hi everyone,

I'm developing a project where i'm using kinetis K20 microcontroller where I need to improve the SD card speed communication. Now it's working in 1 bit mode.

Did someone use SD card in 4 bit mode? I tried to develop the SDHC.c file using processor expert 10.2 where I selected 4 bit mode, but the SD card speed doesn't increase.

Does someone help me to start this 4 bit mode?

If I want to switch from SDHC mode to SPI mode, how I can do it?


Many thanks for your support.


Best regards,