AnsweredAssumed Answered

Switch to Lower Clock Speed - How To Do This?

Question asked by roofie01 on May 8, 2015
Latest reply on May 9, 2015 by roofie01
Hi,
The STM32F4 on my application uses an 8MHz crystal, and synthesized to run at a bus speed of 168MHz.
I'm doing some signal processing that really only requires a speed of 168MHz after a signal is detected. The detection of the signal could be accomplished with a clock speed as low as the crystal itself (8MHz)
Can someone please advise me on the steps on how to do this dynamically - if for example it's running at 168MHz, what should be done with peripherals, etc, to safely set the operation to a lower frequency, and upon a certain event, reset the clock speed higher.

Appreciate any links, suggestions or steps (checked through this site but found nothing)

Thanks!

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