ChibiOS Free Embedded RTOS

I had problems with some cards because it has current consumption more than 250 - 300mA in peak at insertion moment!!!

Maybe a short when inserting the sdcard into the socket?

Probably this is why I have seen inductors in some designs.

A ferrite bead might help.. I would be careful of adding larger values (ie 4.7uH) as with high ESR capacitors and a suboptimal pcb design it may make the situation even worse..

Hi.

pito wrote:Maybe a short when inserting the sdcard into the socket?

No, it is excluded.
This is a very rare problem. But at least I remember two cases where customers sent us a card with the equipment and with the complaint. I do not remember the card manufacturer.