4 ms·
Not millions, but: - Power Delivery supports some 5 different maximum values - 3 different Battery Charging modes - 5 alternate modes according to Wikipedia
by rhn_mk1 8y ago
Not millions, but:
- Power Delivery supports some 5 different maximum values
- 3 different Battery Charging modes
- 5 alternate modes according to Wikipedia (C only)
- >10 different plugs (not an independent variable though)
- 6 different signalling rates
All of those are baked in in the hardware layer. It gets worse when you realize that cables have to support the right combination.
It gets even worse when including things that piggyback on USB, like dual-purpose HDMI and USB ports, Thunderbolt, noncompliant chargers (Apple), Quick Charge, audio alternate mode.