[sdiy] USB Question

[Ingo Debus]

> Am 23.09.2015 um 19:22 schrieb rsdio at audiobanshee.com:
> 
> The Device connector power sense would need either a 5-V-tolerant pin, or a resistor voltage divider to bring the voltage down to the CPU I/O level.

Hehe, on NXP processors this pin is 5-V-tolerant - as long as the 3.3 volts power supply is present. Otherwise it is not. This is mentioned in a tiny footnote in the data sheet. 

So you need the voltage divider anyway. NXP published an application note where this issue is discussed - long after the processor was introduced. Probably many have gone up in smoke before that AN.

Ingo