sdio pins

laurent239955_stm1_st · ‎2009-04-28

Posted on April 28, 2009 at 11:13

sdio pins

laurent239955_stm1_st · ‎2011-05-17

Posted on May 17, 2011 at 13:10

Hi,

I am having difficulties finding the answer to a simple question:

If on a design I only use SDIO_D[3..0], can the other bus signals (SDIO[7..4])be used for other purposes ? or must they stay not connected.

Thanks,

Laurent

relaxe · ‎2011-05-17

Posted on May 17, 2011 at 13:10

Yes, you can use a 4-bit SDIO SDCard interface, and use the SDIO_D4 to SDIO_D7 to other purposes.

I don't have much time to peruse the manual, but I can assure you it works since we use I2S2 with MCK enabled (SDIO_D6) while using SDIO on our design on a STM32F103ZE.

-Relaxe