AnsweredAssumed Answered

FRDM-KL46Z RTC runs only with powered USB OpenSDA cable

Question asked by Joerg Wagner on Aug 8, 2014
Latest reply on Aug 11, 2014 by Joerg Wagner

I use mbed to write the application on to the board FRDM-KL46Z.

The board is powered with Vin 5-9V.

Application runs, but reading the time with

time_t seconds = time(NULL);

will get the same result until the board is powered

with the USB cable at the OpenSDA port in addition.

Is there a chance to power up the board without

the USB cable to keep RTC running?

Thank you.