Xnucleo User Manual
7
V2.6.1, Apr. 25
th
2015
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2.
HARDWARE CONFIGURATI ON
2.1
POWER SUPPLY SETTING S
The power supply of the STM32 Xnucleo board is provided either by the host PC through the USB
cable, or by an external source:
VIN (7V~12V) or +3V3 power pins on CN6;
E5V(5V) pin on CN7;
CN2 power supply connector (7V~12V).
In case VIN, E5V, +3V3 or CN2 is used to power the Xnucleo board, you should use an external
power supply unit.
2.1.1
POWER SUPPLY INPUT FROM THE USB CONNECTO R
All parts of the STM32 Xnucleo board and Shield can be powered from the ST-LINK/V2 (mini) USB
connector by the host PC.
In case the ST-LINK/V2 (mini) USB connector is used to power the Xnucleo board, the host PC will
provide 150mA current at maximum as 3.3V voltage is outputted from the ST-LINK/V2 (mini)
USB connector to the Xnucleo board. And 300mA current at maximum may be provided when
5V voltage is outputted to the Xnucleo board. In case of the board requiring the current more
than 300mA, it should be mandatory to use an external power supply as explained in the next
chapter.
Each part of STM32 Xnucleo including the extension board can be powered by USB(U5V).
However, if the maximum current consumption of the board exceeds 300mA, the USB may be
damaged. 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 Table 2.
Table 2: Power-related jumper
Jumper
Description
