7.1.3
5 V power supply
NUCLEO-WB15CC can be powered with a 5 V DC power source. The 5 V can come from several connectors:
1.
5V_USB_STLK connected to CN11 (default configuration for the supply of the board). This connector is
dedicated to the access of ST-LINK/V2 and Virtual COM port and therefore can get supply from the host
computer. It is also possible to connect a USB charger to this connector. In this case, the ST-LINK and the
VCP cannot be accessible.
2.
CN4 external input. In this case, pay attention to the setting of the jumpers and solder bridges which is very
important. Refer to
for more details.
3.
5V_EXT CN7 pin 6 of ST morpho connector.
4.
7-12V input through the U2 voltage regulator. Refer to
The JP1 jumper selects the 5V source.
shows the configuration versus the selected source.
Depending on the current needed by the devices connected to the USB port, and the board itself, power
limitations can prevent the system from working as expected. The user must ensure that the NUCLEO-WB15CC
is supplied with the correct power source depending on the current needed.
Table 4.
JP2 power supply selector description
Jumper /
Solder bridge
Setting
Configuration
JP1
5V supply source
selector
Default setting
NUCLEO-WB15CC is supplied through the
CN15 Micro-B USB receptacle (USB ST-LINK)
NUCLEO-WB15CC is supplied through the CN6
pin 8 (ARDUINO
®
) or CN7 pin 24 (ST morpho) or
CN4 (Refer to configuration details in the present
power supply section).
NUCLEO-WB15CC is supplied through CN7
pin 6 directly.
When 5V_USB_STLINK is used, JP1 is set on [7-8]. The sequence is specific. In the beginning, only STM32F103
is supplied. If the USB enumeration succeeds, the 5V_USB_STLNK power is enabled by asserting the PWR_ENn
signal from STM32F103CBT6. This pin is connected to a TPS2041C power switch which supplies the rest of the
board. This power switch also features a current limitation to protect the host PC in case of currents exceeding
300 mA.
UM2823
Power supply
UM2823
-
Rev 1
page 13/37
