Missing reference manual documentation for value line STM32H730xx / STM32H730xxQ?

[PhucXDoan]

I'm working with the STM32H730VBT6 and I'm currently using the stm32h730xx.h CMSIS header file, but there's also the stm32h730xxq.h in the cmsis-device-h7 repository. I assume I'm using the correct header file for my microcontroller (pretty sure CubeMX uses stm32h730xx.h too), but RM0468 (Rev. 3) mentions a SDEN bit ("SMPS step-down converter enable") in PWR_CR3 (pg. 289) but the stm32h730xx.h -- in the same field -- calls it "SCUEN" ("Supply configuration update enable"). There are some other discrepancies between the RM and stm32h730xx.h too. The stm32h730xxq.h on the other hand matches well with the RM.

So what gives? Clearly these bits serve different functionalities, and I don't want to be misconfiguring anything blindly. The most likely explanation, I think, is that there's just some missing documentation or that the RM is a bit out of date, but I'm not too sure.

[mƎALLEm · Accepted solution]

Hello,

The letter q means the device supports the SMPS configuration. Please refer to the device datasheet:

The reference manual covers both devices: with and without SMPS.

Need to check what part number you have: SMPS or not.