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How to configure K61 MCU for CDC USB connection wakeup from STOP mode?

Question asked by Evgeni Kosakovski on Mar 15, 2017
Latest reply on Mar 22, 2017 by Kerry Zhou

Hello.

I am working with MK61FN1M0 MCU. I can configure it for go to STOP mode and wakeup on RTC alarm. I want to connect with USB cable and wakeup MCU to RUN mode. I work with external oscillator (connected to coin battery). 

All time my system stay in STOP mode. On RTC alarm it wakeup, perform any operation and goes to STOP mode. Addidtional case for wakeup is connection to PC through USB cable. But this wakeup is not performed correct from STOP mode. I received the message that device not recognised. If my system all time in RUN mode - connection performed succes and I can communicate with my device as "CDC USB device".

Thanks

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