Hi, there's something confusing in the schematic for the H755 Nucleo's reference PCB schematic (MB1363).
I don't mind adding that I'm getting a bit tired of confusing and contradictory documentation from ST Micro.
The description of changes when configuring PSU config modes 2 and 3 are as below:
In the highlighted note at lower left it says that to enable Config 3: "Connect VDD_SMPS_IND_OUT to VDD_LDO".
However, looking just above at Config 2 it seems clear that VDD_SMPS_IND_OUT is already connected to VDD_LDO via the node 1V2_MCU which is always connected to both VDD_LDO and VDD_SMPS_IND_OUT.
Can somebody from please confirm how this should work?
My understanding is that the two modes can be summarised as follows (ignoring some capacitor changes):
Mode 2
- VDD_LDO == VDD_SMPS_IND_OUT
- VDBSD == VCAP
Mode 3
- VDD_LDO == VDD_SMPS_IND_OUT
- VFBSD == VDD_LDO
I need a quick answer please because I've a PCB layout needing to go to manufacture.
Thanks
