1.1.1
Digital section
Figure 2.
STEVAL-IFP043V1 expansion board: digital interface components
The four Arduino UNO R3 connectors:
•
allow expansion board communication with the
development board microcontroller accessing
STM32 peripheral and GPIO resources;
•
provide digital supply voltage between the
expansion board, in either direction.
Normally, the
development board supplies the expansion board by a 3v3 or 5v0 generated by the
USB. You can select the preferred voltage on the expansion board via SW3 (3v3 closing pins 1-2; 5v0 closing
pins 2-3).
Alternatively, it is possible to supply the
development board by the expansion board. In this
case, an external supply voltage (7-12 V) should be connected CN2 connector (not mounted by default) on the
expansion board and the ground loop should be closed by mounting D2 (enable the reverse polarity protection) or
by closing J17 (without reverse polarity).
To supply the V
IN
voltage rail is necessary to:
•
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
UM3049
Overview
UM3049
-
Rev 1
page 3/17
