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JOkam.1
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2021-12-02
2023-06-14
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Would like to use a STM32L452 MCU with VDD=1.8V but still be able to maintain USB functionality for DFU updates. This device has a separate VDDUSB pin that I would like to power separately (3.3V) from an LDO when VBUS is connected.
2022-02-01
As long as the VDDUSB supply is from 3.0V to 3.6V and is the last to be applied and first removed (vs. VDD), there should be no issues?
Re: Would like to use a STM32L452 MCU with VDD=1.8V but still be able to maintain USB functionality for DFU updates. This device has a separate VDDUSB pin that I would like to power separately (3.3V) from an LDO when VBUS is connected.
2022-02-02
Thank you for the clarification.
