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Associate II
July 18, 2026
Question

STPMIC1 BUCK2 VDD DDR

  • July 18, 2026
  • 0 replies
  • 4 views

Hello everyone,
I designed a board using the STM32MP157 and STPMIC1A. During the initial power-on tests, I noticed that there was no output from the VDD BUCK.
The board was tested without any operating system or boot process. Is this normal? This is the first board I’ve designed with the STM32MP1, and if this is normal, I can proceed with porting the OS however, if it’s abnormal, I’ll need to investigate the source of the problem. The board was also successfully detected by the PC in USB boot mode.

 

Regards