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.