Can I disable the STM32 nucleo-32 (L031K6)'s usb commnication port?

[DU2]

hello, I am using L031K6 with UM1956 board.

I am trying ultra low power sensor project with it.

I want to use this board in disabling USB serial communication port status.

because I think it is spending a lot of battery, even though the CPU is in the sleep mode.

Dose it have this option, or possible way to make it?

thank you for read.

[David SIORPAES]

You can disable the debugger part altogether by powering the MCU directly from CN4-14 at 3V3. You need to unsolder SB14 and SB9 beforehand. See 6.2.2 paragraph of UM1956 for all available powering schemes details.