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STM32F0 does not run standalone

Question asked by Mr_M_from_G on Aug 12, 2013
Latest reply on Aug 13, 2013 by Mr_M_from_G
Hi,
on my STM32F0 discovery board I configured the clock source to be HSI with a system_stm32f0xx.c generated by the clock configuration tool . That seemed to run like it should. Now I pulled JP2 and supplied Vdd pin with external 3,3V expecting only the STM32F0 to run while the USB -> SWD uC would not run. But that failed, both don't run although I can measure 3,3V at the Vdd pins of STM32F0. What else than clock in is coming from the USB -> SWD uC needed to run STM32F0? Is there a way the STM32F0 falls back to HSE?
Any hints are welcome.

Thank you
Martin

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