What should be RCC configuration as it is failing in initialisation?

[NDham.11]

I am using custom designed board having STM32H745BIT6 and 25MHz external crystal with LDO and SMPS pins connected as seen in attached snippet.

I have created, compiled new STM32 project using CubeIDE and CubeMX software for LED blinking.

Attached .IOC file for same as well.

Mainly I don't know about which supply source to select in POWER parameters under RCC section as per my custom board pin connection.

[Foued_KH]

Hello @NDham.1​ ,

Below is diagram from reference manual showing different hardware configurations for power supply:

So, you can choose the "PWR_LDO_SUPPLY" as Supply source:

 

Foued.