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system clock stm32f0 ?

Question asked by hammad.abdelazez on Jul 29, 2015
Latest reply on Jul 29, 2015 by Clive One
hi' i'm new stm32f0 user and i working on stm32f072 , my first question what is value of system clock of microcontroller when i use system_stm32f0xx.c file which found in
stm32f0_stdperiph_lib\STM32F0xx_StdPeriph_Lib_V1.5.0\Projects\STM32F0xx_StdPeriph_Examples code example , i know the table in top of this file tell me that the freq is 48000000 HZ  but when i toggal any pin from main loop like this
{
GPIOA->ODR  ^= 0xffff;
}

and i see the output in oscilloscope the freq is 400 KHZ
and when i toggale like this
{
GPIOA->BSRR;
GPIOA->BRR; 
}
the freq is 1MHZ 
what is the fault? and what is the real speed of microcontroller? 

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