OLIMEX© 2018
STM32-H407 user's manual
6.8 PWR Jack
The power jack used is the typical 2.5mm one used by Olimex in most of our products. You should
provide between 6 and 16 volts @ 1A to the board.
Pin #
Signal Name
1
Power Input
2
GND
More info about the power supply can be found in chapters 2 and 5 of this manual.
6.9 Battery connector
When using the battery connector keep in mind that it is an energy solution that wouldn't be able to
power the board and all the peripherals!
It help keeping information in the processor if you need to transport the board from one power
supply to other.
Pin #
Signal Name
1
VBAT
2
GND
The pin names are also written on the bottom of the board in the base of the connector.
6.10 U3BOOT pads
The best use for the GND, RX3, TX3 pins from the U3BOOT connector would be getting the
output of the available demo program on a computer terminal via USB-SERIAL-CABLE-M
(
https://www.olimex.com/Products/Components/Cables/USB-Serial-Cable/USB-Serial-Cable-M/
)
U3BOOT are 3 pinholes set on USART3 and are named on the bottom – GND, RX3, TX3 and
notice there are two vias near them which are actually VCC and can be used if connecting
U3BOOT. More information about booting over UART can be found in the processor's datasheet.
6.11 Jumper description
Please note some of the jumpers on the board are SMD type. If you feel insecure in your
soldering/cutting technique it is better not to try adjusting SMD jumpers.
Also if you feel incapable of removing the PTH jumper with hand better use tweezers. We do.
6.11.1 PWR_SEL
PWR_SEL is important PTH jumper allowing easy switching of input current. If you are powering
the board via the PWR_JACK set it to position 1-2 (default → to the edge of the board).
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