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STM32F407 > STM32F427 MIGRATION

Question asked by prieur.jean on Jul 8, 2014
Latest reply on Aug 20, 2014 by pbk
Hi everybody!

I want to migrate from STM32F407 to STM32F427, and use the full power of this microprocessor (180MHz instead of 168MHz), because I need more speed ressources.

First, I find this new application note:
http://www.st.com/web/en/resource/technical/document/application_note/DM00123028.pdf
Do you know what is the frequency overdrive mode ?


Secondly, I want to set the new maximum frequency on my project (I already use a STM32F427 but at lower frequency). I use an external oscillator of 8MHz.

I use this clock parameters for the moment:
SystemCoreClock = 168000000;
PLL_M  = 8
PLL_N  = 336
PLL_P  = 2
PLL_Q  = 7
AHBPrescTable[16] = {0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 6, 7, 8, 9};
HSE_VALUE = 8000000

Can I only change the parameter SystemCoreClock to 180000000 ? Because it works but I don't know if the speed of core change.

Thank you very much!

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