Power on or off the expansion board to the SD card

in the Spresense documentation "Regarding power consumption during sleep, if an SD card is inserted into the expansion board, the power consumption of the SD card increases by about 5 mA."
and

In order to reduce current consumption during sleep, please let me know if there is an Arduino code that can turn on and off power to the SD card.

Thank you for your cooperation.

spresense

2022-09-29 20:15

1 Answers

I don't know if it's very helpful, but if you don't care about the speed, you can use SPI to record it on your SD card.In the past, I made my own add-on board for main board with universal board.We also have a library just in case (the library was created for personal use, so there may be insufficient debugging).Please use it at your own risk.)

https://github.com/YoshinoTaro/SPISD-for-SpresenseMainboard

I think the power consumption during sleep can be suppressed by adding FETs for switches between the power supply lines to the SD card and controlling the power supply with GPIO.

2022-09-29 20:15

If you have any answers or tips

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