Skip to main content
NChor.1
Associate II
Feb 10, 2022 5:43 AM UTC
Solved

STM32F722RET6 increasing HCLK frequency issue

There is external crystal on my PCB Mfr part: X1E0003410273 I am working on STM32 Cube IDE. At first whenever I enabled external crystal my program did not run at all. Even In low frequencies. Then I enabled Clock Secure System (CSS) Now my program is running with external crystal with 48MHz HCLK but when I try to increase it more than 48Mhz program stops running again. I am beginner in stm32 and only working with Cube IDE. Is there problem with external crystal I choose or something else?

Here is my Clock configuration0693W00000JPF4jQAH.png

This topic has been closed for replies.
Tesla DeLorean
Tesla DeLoreanBest answer
Guru
Feb 10, 2022 6:32 AM UTC

Check VCAP capacitors and voltages.

Check VOS settings

Check Flash Latency

Check HSE or internal clocks via PA8/MCO

​

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..

2 replies

Tesla DeLorean
Tesla DeLoreanBest answer
Guru
Feb 10, 2022 6:32 AM UTC

Check VCAP capacitors and voltages.

Check VOS settings

Check Flash Latency

Check HSE or internal clocks via PA8/MCO

​

Tips, Buy me a coffee, or three.. PayPal Venmo (See Profile) Up vote any posts that you find helpful, it shows what's working..
NChor.1
NChor.1Author
Associate II
Feb 10, 2022 7:17 AM UTC

Thank you so much. It was issue with VCAP