ST X-NUCLEO-USBPDM1, User Manual

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4 USB Type-C powered mode
Once STM32 is programmed, it is possible to power the STM32 using USB Type-C V
BUS
voltage through a
source device connected to the Type-C connector (CN1). The X-NUCLEO-USBPDM1 on-board LDO (U2)
generates 3.3 V to supply the system. In this case, 5 V is not available yet on the STM32 Nucleo development
board.
Note: STM32 Nucleo development board power jumper must not be connected (JP2 of NUCLEO-G071RB or JP5 of
NUCLEO-G474RE ).
JP2 LDO OUT–3.3 V and 3.3 V–NRST jumpers must be closed.
TCPP01-M12 can be powered by:
• 3.3 V from the USB Type-C connector V
BUS
(JP2 Vcc – 3.3 V jumper closed and Vcc–V_OUT jumper open)
or
• a dedicated STM32 GPIO for battery powered cases (JP2 Vcc – 3.3 V jumper open and Vcc–V_OUT
jumper closed). This case is also called low power mode.
TCPP01-M12 dead battery resistor clamps are removed:
• automatically when 3.3 V is present (JP2 DB – 3.3 V jumper closed and DB – DB_OUT open) or
• by GPIO (JP2 DB – 3.3 V jumper open and DB – DB_OUT closed).
UM2668
USB Type-C powered mode
UM2668 - Rev 2
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