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MasterPhi
Associate II
November 25, 2025
Solved

STM32N6 wrong APB bus clock limit

  • November 25, 2025
  • 2 replies
  • 498 views

On STM32CubeMX 6.16, STM32N6 package 1.3.0, APB frequency limit is shown as 400MHz instead of 200MHz.

AHB is correctly shown as 200MHz

MasterPhi_0-1764062602311.png

MasterPhi_1-1764062639458.png

 

Best answer by Souhaib MAZHOUD

Hello ​@MasterPhi 

This issue has been fixed in the latest version of STM32CubeMX 6.18.0 

Download STM32CubeMX6.18.0 from this link. 

Regards,

Souhaib

2 replies

ST Technical Moderator
November 25, 2025

Hello @MasterPhi 

Thank you for posting!

I am currently checking this issue internally; Could you provide the MCU part number.

KR, Souhaib

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MasterPhi
MasterPhiAuthor
Associate II
November 25, 2025

Hi Souhaib,

I've selected NUCLEO-N657X0-Q board, MCU should be STM32N657X0.

ST Technical Moderator
November 25, 2025

Hello @MasterPhi 

Thank you for bringing this issue to our attention!
The problem has been escalated to the dedicated team for fixing.  (Ticket 222493 This is an internal tracking number and is not accessible or usable by customers).

BR, Souhaib

To give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question.
Souhaib MAZHOUDBest answer
ST Technical Moderator
July 1, 2026

Hello ​@MasterPhi 

This issue has been fixed in the latest version of STM32CubeMX 6.18.0 

Download STM32CubeMX6.18.0 from this link. 

Regards,

Souhaib

To give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question.