Digital Section; Figure 2. X-Nucleo-Out11A1 Expansion Board: Digital Interface Section - ST X-NUCLEO-OUT11A1 User Manual

1.2

Digital section

The digital section is associated with the STM32 interface and the digital supply voltage to and from the
X-NUCLEO-OUT11A1
The dotted green line indicates the whole digital interface section. The pink rectangles identify the Arduino® UNO
R3 connectors.
The four Arduino® UNO R3 connectors:
• allow the expansion board to communicate with the
accessing the STM32 peripheral and GPIO resources;
• provide the digital supply voltage between the
OUT11A1
Usually, the STM32 Nucleo
the USB.
Alternatively, it is possible to supply the
an external supply voltage (7-12 V) should be connected to the CN11 connector (not mounted by default) on the
expansion board and the ground loop should be closed by mounting D2 (enabling the reverse polarity protection)
or by closing J5 (without reverse polarity). In this scenario, the logic side of the
3.3 V supply rail generated by the expansion board: in this case, on the X-NUCLEO-OUT11A1, J4 must be closed
between pins 5 and 6.
To supply the VIN voltage rail, it is necessary to:
• close the JP5 jumper between pins 2 and 3 and open the JP1 jumper on the NUCLEO-F401RE;
• open the JP5 jumper between pins 1 and 2 and close the JP5 jumper between pins 3 and 4 on the
NUCLEO-G431RB.
The pin 3 of the connector CN11 can be used to supply the logic side of the
expansion board. In this case, on the X-NUCLEO-OUT11A1, the pins 1 and 2 of J4 must be closed (pins 5-6
open).
UM3079 - Rev 1
expansion board.
Figure 2. X-NUCLEO-OUT11A1 expansion board: digital interface section
expansion board, in either direction.
development board supplies the expansion board by a 3.3 V or 5.0 V generated by
STM32 Nucleo
STM32 Nucleo development board microcontroller
STM32 Nucleo development board and the
development board by the expansion board. In this case,
ISO808
ISO808
UM3079
Digital section
X-NUCLEO-
can be supplied by the
independently by the
page 3/19