i.MX233 and SDIO multiplex

[daveshah]

Would it be possible to have both an SDIO wireless device and an SDHC card on one SSP of the i.MX233, using a multiplexer like TS3A27518E-Q1 or MAX4996? Also, could you do it simply by connecting the data lines together for the two cards and having separate CMD lines for each device?

[YixingKong]

Hi David, did Jacky's answer helps you. If yes, please mark it as Correct Answer.

[JackyAtFreescal · Accepted solution]

Quote from "SD Specifications Part 1 Physical Layer Specification Version 2.00"

3.5 Bus Topology

...

Common bus signals for multiple card slots are not recommended. A single SD bus should

connect a single SD card.

...

Regards,

Jacky