STM32H7B0VB Max Clock

[MMira.4]

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

[TDK · Accepted solution]

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

 

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

[MMira.4]

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

[Tesla DeLorean]

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..