Posted on May 17, 2011 at 13:43Hej Thomas, Few smaller things: The JTCK line has a weak internal pull down, so consider changing your external pull up to a pull down if you are concerned about your current consumption in stop mode. I've also seen it...

Posted on May 17, 2011 at 13:43Hi Berke, A wild guess. When you switch off the external regulator, the supply voltage slowly drops (as you have large bypass capacitors on the supply line). At a certain voltage (1.8V or so) the MCU detects low voltag...