7.1
Power supply
7.1.1
General description
By default, the STM32WB15CC microcontroller embedded on this Nucleo board is supplied by 3V3 but the board
proposes a lot of possibilities to supply the device. The 3.3 V can first come from the ST-LINK USB, ARDUINO
®
,
or ST morpho connectors. Moreover, the STM32WB15CC can be supplied by an external source, between 1.8
and 3.3 V. Thanks to the level shifter, the debug by embedded ST-LINK is always possible even if the supply
voltage of the target is different from 3V3 (ST-LINK supply).
shows the power tree. Moreover, this figure
also shows the default state of the jumpers and the solder bridges.
Figure 7.
NUCLEO-WB15CC power tree
7.1.2
7 to 12 V power supply
NUCLEO-WB15CC can be powered with a 7 to 12 V DC power source. There are three accesses for this type of
DC levels:
1.
VIN CN6 pin 8 of the ARDUINO
®
connector. It is possible to apply until +12 V on this pin or use an
ARDUINO
®
shield which can deliver this type of voltage on the VIN pin.
2.
VIN CN7 pin 24 of the ST morpho connector. It is possible to apply until +12 V on this pin like for the
ARDUINO
®
connection.
3.
CN4 external input. In this case, pay attention to the setting of the jumpers and solder bridges which is very
important. Refer to
These sources are connected to the U2 linear low drop voltage regulator. The 5 V output of this regulator is a
potential source of 5V. Refer to
for further details.
UM2823
Power supply
UM2823
-
Rev 1
page 12/37
