microSD CD1 and CD2 signals

Community PCB Design
1

Hi,

What are the CD1 and CD2 signals used for on a microSD connector?

The Uber board V2 seems to leave these signals unconnected, while the DosOnChip thing grounds CD2 and seems to be able to control CD1…

Any idea!?

Thanks

2

jeanseb:
What are the CD1 and CD2 signals used for on a microSD connector?

CD = Card Detect, they are electrical open without a

card installed, closed with a card inserted.

[More info here

In future please post electrical/electronic signal

questions in “projects” (not PCB Design Questions).](http://tinyurl.com/6o6pc2)