Hardware layout and configuration UM2408
24/51 UM2408 Rev 2
Figure 15. Supply configuration 3: Internal SMPS and LDO cascaded
Figure 16. Supply configuration 4: external SMPS
Warning: Board SMPS/LDO FW PWR configuration must match with
the HW configuration. If not, the user faces a deadlock: after
the reset, STLINK can't connect the target anymore.
The FW PWR configuration corresponds with the following in
the main.c, in the function SystemClock_Config:
- In the case of “Direct SMPS” HW configuration (Default):
HAL_PWREx_ConfigSupply (PWR_DIRECT_SMPS_SUPPLY);
- In the case of “LDO” HW configuration:
HAL_PWREx_ConfigSupply (PWR_LDO_SUPPLY);
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