Paul Staron

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9 years, 1 month ago.

Restart SD card after wake up

Is it possible to power down the SD card (remove HT) during deep sleep and restart after wake up? What would be the correct procedure?

Question relating to:

Last updated: 29 Aug 2016
A re-written SDFileSystem library with improved compatibility, CRC support, and card removal/replacement support. fatfilesystem, MMC, SD, SD Card, SDHC, SDXC

1 Answer

Neil Thiessen
9 years ago.

Hi Paul, sorry for the delayed response, I'm not receiving emails from mbed for some reason. The best thing to do would probably be to install a transistor on the SD card's power line. Unmount the card just before you got to sleep, then power it off using the transistor. When you wake up, power the card back up using the transistor, and then re-mount it.