3 ms·
Most hosts will provide at least 500mA without any signal from a device. Hosts and chargers vary in their current capability; those capable of providing more t
by nickff 13y ago
Most hosts will provide at least 500mA without any signal from a device. Hosts and chargers vary in their current capability; those capable of providing more than standard USB spec vary in their implementation. In general, high current hosts always provide their full capability, and the devices are the ones which require some signal to indicate maximum current available. Other devices increase their current draw until the host's voltage drops, and hold at that level (or less).
- sliverstorm 13y agoOk, so maybe I had it backwards which way the communication goes.
- nickff 13y agoI wouldn't say you got it backwards, the communication is bilateral, but the device is the unit which controls current flow; the effect is the same.