« previous next »
Pages: [1]

Author Topic: Draw current from CDP despite claiming 0 mA  (Read 4825 times)

jb

  • Member
  • ***
  • Posts: 26
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?
Logged

Jan Axelson

  • Administrator
  • Frequent Contributor
  • *****
  • Posts: 3033
    • Lakeview Research
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.
Logged
Pages: [1]
« previous next »