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Clock problem

Question asked by john7 on Oct 28, 2013
Latest reply on Oct 28, 2013 by john7
I work with STM32F103RBT6.
In stm32f10x.h i set  #define STM32F10X_MD, it leads us to :
#define SYSCLK_FREQ_72MHz 72000000 in system_stm32f10x.h.
So SystemInit() function should go to SetSysClockTo72().
However on MCO pin configured as PLL/2 i see frequency 12Mhz i.e 24Mhz system clock instead of 72Mhz.
What could be a problem?