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Associate II
September 2, 2026
Question

CubeMX2 does not validate APB2 clock requirement

  • September 2, 2026
  • 2 replies
  • 20 views

According to the reference manual, enabling USB requires APB2 to operate at a minimum clock of 12MHz. Cubemx2, however, does not validate this constraint and will proceed even if an invalid clock is configured

2 replies

Sara BEN HADJ YAHYA
ST Technical Moderator
September 2, 2026

Hi ​@G5658,

Could you please share which MCU you are working with? That will help us reproduce the issue and look into it more easily.

Thanks & Regards,

Sara.

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G5658Author
Associate II
September 2, 2026

STM32C551KEU6