STM32H750 CubeMX - some PLL options grayed out?

[ron239955_stm1]

Hi all,

I'm trying to set up a new STM32H750 project. I've created quite a few projects using CubeMX in the past, so I'm familiar with the process. However, now I'm trying to start up a STM32H750 project, and I've very quickly run into an issue. In the Clock Configurator, some of the PLL settings are greyed out (DIVR1, DIVP2, DIVP3, DIVR3) and I can't edit them. I have HSE enabled, and have PLLCLK configured, but I don't know what else I might be missing. I'm using the latest STM32CubeMX (6.14.1) Can someone point out what I'm doing wrong?

[TDK · Accepted solution]

You are not be able to edit them if they are not used anywhere in your system.

Once you select something that is clocked by PLL1R for instance, you will be able to edit DIVR1.

[ron239955_stm1]

Ah, of course! I was trying to copy another configuration, starting with the clock configuration. I hadn't gotten to most of the peripherals yet.

Thank you!