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The issue of clock configuration for STM32F446RCT6

乒乓
Visitor

‎2026-01-27 11:05 PM

Why is it that when I set the clock frequency of the STM32 to a high frequency (180 MHz), the code will crash, but when I set it to a low frequency (72 MHz), the code can run normally?

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mƎALLEm
ST Employee

‎2026-01-28 12:17 AM - edited ‎2026-01-28 12:19 AM

Hello @乒乓 and welcome to the ST community,

What crystal value you've attached to HSE? you should not exceed 8MHz in that configuration.

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乒乓
Visitor
In response to mƎALLEm

‎2026-01-28 12:40 AM

The external clock I configured is 8 MHz.

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乒乓
Visitor
In response to mƎALLEm

‎2026-01-28 12:41 AM

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mƎALLEm
ST Employee
In response to 乒乓

‎2026-01-28 1:37 AM - edited ‎2026-01-28 1:39 AM

What board are you using? ST board or custom board?

If custom board, post the schematics.

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