I have been struggling for some time to get a clear answer on whether pull-ups or pull-downs are necessary on microSD cards used in SPI mode. Or if not necessary, then at least desirable. So far the best I have been able to come up with from several sources is that they might be necessary on the tw…

Pullups/Pulldowns for microSD pins?

nickgammon April 3, 2012, 10:44pm 8

10K sounds fine to me.

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