Steven Cohen

When usb attached to FRDM board, strange issue when applying 3.3v to  coin cell location

Discussion created by Steven Cohen on Apr 6, 2013
Latest reply on May 2, 2013 by Bob Paddock

When I attach an external power supply of 3.3v to TP8, and also have USB connection to PC for debug, the glide point on my laptop starts to drag and is difficult to use.  If I turn off the external 3.3V and just let USB power the FRDM board, it works fine.  Could USB power from my PC be effected in some strange way?