A few questions about its OTG functionality

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• Can the OTG port be powered by USB 2.0 which is limited to 0.5A?
• Can the OTG port behave like any USB device or an ethernet adaptor?

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• The 0.5A is enough for ROCK Pi S, check the power consumption: A quick&dirty power draw / performance comparison

• Check https://wiki.radxa.com/RockpiS/dev/usbnet

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What if I want to use the OTG port for anything other than ethernet?