AnsweredAssumed Answered

MPR121 Startup

Question asked by Zach de Vries on Jan 7, 2016
Latest reply on Jan 11, 2016 by David Diaz Marin


I am using the MPR121 chip to control 8 capacitive buttons. If I press any one of these buttons while the initialization is in progress, the chip no longer responds to interaction.

If I ensure nothing is in contact with the touch buttons during initialization, all of the buttons work properly.  I have tested this on 16 units, and all of them react the same. 

I followed the source code outline on Sparkfun's website for my initialization procedure. I also looked through the available application documents provided, but did not see anything relating to this issue.  Has anyone else encountered this problem and if so, was a solution found?


Thank you in advance for any help provided.