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Author Topic: Draw current from CDP despite claiming 0 mA  (Read 10728 times)

jb

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Draw current from CDP despite claiming 0 mA
« on: March 03, 2021, 05:44:15 pm »
If a device detects that it's connected to a Charging Downstream Port, can it enumerate with maxPower = 0 mA but still draw current, because the CDP over-rules the enumeration?
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Jan Axelson

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Re: Draw current from CDP despite claiming 0 mA
« Reply #1 on: March 03, 2021, 09:56:18 pm »
bMaxPower specifies how much bus current the device requires. A device that requires bus current but specifies bMaxPower = 0  might enumerate but wouldn't be compliant with the spec.
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