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KL25Z USB artifact issue

Question asked by Karolina Janosova on Feb 11, 2017
Latest reply on Feb 16, 2017 by Jorge Antonio Alcala Vazquez

Hi, I have FRDM KL25Z connected to expansion board FXS MULT2-B and together powered by battery. On KL25Z, I switched on LED diode (LED diode lights) . But when i connect usb to PC (or unconnected from PC) , the diode blinks once (caused by supply voltage temporarily drops from 3.3V to 1V, and then stabilizes at 3.1 V again). It is caused by time delay beetwen power supply from PC and battery power supply (or opposite way). I need eliminate this artifact or at least reduce. Knows someone, how to solve it? Thank you very much.kl25z frdm-fxs-mult2-b usb artefacts

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