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The four Arduino
•
allow expansion board communication with the
peripheral and GPIO resources;
•
provide digital supply voltage between the
OUT08A1
Normally, the
STM32 Nucleo
closed) generated by the USB. You can select the preferred voltage on the expansion board via SW2 (3v3 by
closing pins 1-2; 5v0 by closing pins 2-3).
Alternatively, it is possible to supply the
an external supply voltage (7-12 V) should be connected to CN2 connector (not mounted by default) on the
expansion board and the ground loop should be closed by mounting D2 (that enables reverse polarity protection)
or by closing J3 (without reverse polarity).
To supply the V
•
close jumper JP5 between pins 2 and 3 and open jumper JP1 on the
•
open jumper JP5 between pins 1 and 2 and close jumper JP5 between pins 3 and 4 on the
G431RB
1.1.2
Power section
The power section involves the power supply voltage (CN1, pin 1 V
CN1 pin 3 and CN1 pin 2) and electromagnetic compatibility (EMC) protection (U2).
UM2715 - Rev 1
Figure 2.
X-NUCLEO-OUT08A1 expansion board: digital interface components
®
UNO R3 connectors:
expansion board, in either direction.
development board supplies the expansion board by 3v3 or 5v0 (JP5 pins 1-2
STM32 Nucleo
voltage rail is necessary to:
IN
STM32 Nucleo
development board accessing STM32
STM32 Nucleo
development board and the
development board by the expansion board. In this case,
NUCLEO-F401RE
, pin 2 GND), load connection (between
CC
UM2715
Overview
X-NUCLEO-
NUCLEO-
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