Paralleling microSD cards

[kellys_eye]

Has anyone ever parallel-connected multiple micro-SD cards? If so, what technique/results did you get?

Can you parallel the data lines and switch the power lines 'as required' or do the data lines need isolating bi-directional buffers?

 

[bertus]

Hello,

Have a look at the following PDF:
https://www.kingston.com/datasheets/SDCIT-specsheet-8gb-32gb_en.pdf

The following page will show you the pinout:
https://www.electroniccircuitsdesign.com/pinout/sd-microsd-card-pinout.html

Bertus

 

[kellys_eye]

Couple of nice and clear pdf's there bertus - thanks for taking the time to post the links.

But if anyone has done this and can report on their results I'd be interested to hear how they got on.

 

[bertus]

Hello,

Did you read the pages 7 and 8 of the kingston PDF?
It shows the SPI method with bus connections.

Bertus

 

[kellys_eye]

Yup.
The potential intent is fully read-only and I can see the technique for 'paralleling' but would like to know if there are any particular performance issues in a real-world example and whether or not others switched the power lines (power saving).