The stm32l476-disco can be powered by a battery. The board has a socket to place the battery on the backside of the board.
For using the battery you need to do the following steps.
- Remove the RST jumper
- Remove the jumper marked as CN3
- The Jumper JP5 should be set to IDD
- The Jumper JP6 should be set to BATT
The battery-powered operation is useful in low power operations.
There is a switch to change the power selection from battery to USB. You need to physically change the jumper location to BATT from 3v3.
The controller gets 3v3 from the st-link section of the board. ST-link gets the power using the USB mini port.
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