Table 5 explains the other jumper settings and configurations.
Table 5. Jumper configuration
Jumper Definition
Setting
(1)
Comment
(1)
JP1 External debugger selection
OFF Debug with internal ST-LINK
ON Debug with an external debugger
JP2 IDD measurement
ON
MCU is powered by the on-board
power supplies.
OFF
Use an ammeter to measure the MCU
power consumption, or connect an
external 3V3 or 1V8 source on pin 2 to
supply the MCU (STLINK-V3PWR tool
with the
STM32CubeMonitor-Power or
ULPBench probe as an example)
JP3
5 V power source selection
(user USB power source
selection)
[1-2] 5V source from STLINK-V3EC
[3-4]
5V source from ARDUINO
®
VIN 7‑12 V
[5-6] 5V source from 5V_EXT
[7-8]
5V source from user USB when it acts
as a sink port
JP5 VDD voltage selection
[1-2] The VDD voltage selection is 3V3.
[2-3] The VDD voltage selection is 1V8.
1. The default configuration is in bold
UM3276
Quick start
UM3276 - Rev 1
page 8/40
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