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STM32H7 GPIO TOGLE MAX FREQUENCY

Question asked by Danilo Frigerio on May 7, 2018
Latest reply on May 17, 2018 by Danilo Frigerio

With STM32F765 and MDK-ARM compiler ( O3 and compile for SPEED I was able to achieve 108Mhz on output pin, performing while loop ( just main() and all interrupt disabled ) .

 

Now with STM32H743 with same compiler and same source maximum frequency is 16.7MHz , with PLL configured to have 400MHz clock ( tested on RCC_MCO2 output pin )

 

Anyone know why ?

 

Thanks

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