Frank Coenen wrote:
Somehow that doesn't sound right to me. Like in the movies, when they
try to hack a computer: there is always some OVERWRITE command, that
doesn't require a password but will grand you access to all the files.
Same applies here. Why put a safety-measure in place if you plan to
ignore it anyway? ;-)
Because if you have 5V connected, but the host is not talking in host
protocol, that itself violates the USB protocol to a degree.
This is not a safety issue.
All USB hosts have some form of current limiting.
Worst case is that you plug something that takes 500mA into a USB port
that can't take it, is the bus resets.
And even that wouldn't happen if the host is actively behaving as a USB
host.
If it's not, then the bus resetting doesn't really matter so much, as
it's not using the bus.
There are _lots_ of 'USB fan' or 'USB light''s that are out there.
These just treat the USB port as a source of 500mA.
Manufacturing a host that will die when you plug in one of these will
lead to _lots_ of returns.
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