External Power Supply Inputs: Vin And Ev5; Table 5. Jp1 Configuration Table - ST STM32 Nucleo board User Manual

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UM1724

powered and the red LED LD3 is turned ON, thus the STM32 Nucleo board and its shield

can consume a maximum of 300 mA current, not more. If the host is not able to provide the

required current, the targeted STM32 microcontroller and the MCU part including the

extension board are not power supplied. As a consequence the red LED LD3 remains

turned OFF. In such case it is mandatory to use an external power supply as explained in

the next chapter.

When the board is power supplied by USB (U5V) a jumper must be connected between pin

1 and pin 2 of JP5 as shown in

JP1 is configured according to the maximum current consumption of the board when

maximum current consumption on U5V doesn't exceed 100mA (including an eventual

extension board or Arduino Shield). In such condition USB enumeration will always succeed

since no more than 100mA is requested to the PC. Possible configurations of JP1 are

summarized in

Jumper state

JP1 jumper OFF

JP1 jumper ON

Warning:

Note:

In case the board is powered by an USB charger, there is no USB enumeration, so the led

LD3 remains set to OFF permanently and the target MCU is not powered. In this specific

case the jumper JP1 needs to be set to ON, to allow target MCU to be powered anyway.

5.3.2