Power supply connections of a target board UM2243
20/41 UM2243 Rev 2
Figure 13. STM32 Nucleo64 target board plugged into the X-NUCLEO-LPM01A
8.2 Settings for use of the Arduino Nano connectors in a
Nucleo32 use case
The STM32 Nucleo32 target board should be adapted to be powered via the AREF pin of
the Arduino Nano connector (CN13, pin13) instead of the 3.3 V pin, prior to connection to
the
X-NUCLEO-LPM01A board.
Please refer to the targeted Nucleo board User
Manual to adapt the board to be supplied
from AREF. See the example in 15.2: How to adapt an STM32L476 Nucleo-64 to power the
MCU from the Arduino AREF pin. This adaptation is needed to supply power to the STM32
MCU only, so that only the MCU consumption is me
asured. In other words, this adaptation
removes the consumption of peripherals such as ST-LINK.
The power sources and the USB connector of the X-NUCLEO-LPM01A must first be
d
isconnected to avoid any electrical conflict or damage.
Then apply the correct X-NUCLEO-LPM01A jumper settings for JP9, JP10 and JP4,
follow
ing Table 3: Power output related jumper and connector settings. As shown in
Figure 12.
Finally, the STM32 Nucleo32 is plugged into the X-NUCLEO-LPM01A using connectors
CN12 and CN
13. Please check the orientation of the Nucleo32 using the silkscreen printed
names on the X-NUCLEO-LPM01A board or by referring to Figure 14.
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