3 ms·
> BC-1.2 defines a Dead Battery Provision (DBP) which allows for an extremely simple handshake to request that 100mA be available for a longer term — up to 45 m
by fpgaminer 10y ago
> BC-1.2 defines a Dead Battery Provision (DBP) which allows for an extremely simple handshake to request that 100mA be available for a longer term — up to 45 minutes.
45 minutes is such a long time, what is the practical difference between always providing 100ma and only providing 100ma for 45 minutes? A device can be plugged in at any time, even right after a previous device had used the port for 45 minutes, so this rule seems to me to de facto say that a port must provide at least 100ma. If my understanding is correct, then why have the rule at all? Just make 100ma the unnegotiated power instead of 2.5ma.