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MMira.4
MMira.4
Associate II
March 7, 2022
Solved

STM32H7B0VB Max Clock

  • March 7, 2022
  • 2 replies
  • 7087 views

Hi, I'm trying to configure my stm32h7b0vb for max clock (280Mhz), but max freq on DIVN1 is 420Mhz, and DIVP1 is 2 (min val). Therefore I only reach 210Mhz

0693W00000Kbff4QAB.png

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Best answer by TDK

DIV1M can be less than /16. Here is one of several working scenarios:

0693W00000Kbg2cQAB.png 

Make sure you have VOS0 selected in RCC -> Power Parameters.

2 replies

TDK
TDKBest answer
Super User
March 7, 2022

DIV1M can be less than /16. Here is one of several working scenarios:

0693W00000Kbg2cQAB.png 

Make sure you have VOS0 selected in RCC -> Power Parameters.

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MMira.4
MMira.4Author
Associate II
March 8, 2022

Thanks, I was trying to use DIV1M between 1-2Mhz!

Tesla DeLorean
Tesla DeLorean
Guru
March 10, 2022

Yeah, I think that was desirable for the PLL comparison frequency on the F2/F4 parts, but a lot of the H7 I typically see 5 MHz

I'd like to see ST provide characterization charts for the overall stability, but I've been disappointed for over a decade..

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