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oyama / pico-w-usb-failures

This repository investigates issues with initiating communication when the battery-powered Raspberry Pi Pico W is connected to a host PC via USB Type-C.
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Pull-down VBUS pins #3

Open oyama opened 4 months ago

oyama commented 4 months ago

There is a slight leakage from the Pico W to the VBUS when running on battery power, exceeding the USB's vSafe0V by 0.8V, and sometimes the host PC-side USB controller may not supply power to the VBUS. This condition can be resolved by pulling down the VBUS in the circuitry on the Pico W side.

Pico W USB Pull-down

oyama commented 4 months ago

What happens if the Pico W is configured to accept Type-C peripherals as a USB host?