nanaholic
Headphoneus Supremus
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- Sep 2, 2010
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I'm going to be brief and just add that in the USB specification the logic levels is actually achieved by a pair of wires - D+ and D-.
A logical one is when BOTH D+ is over 2.8V and D- is under 0.3V.
A logical zero is when BOTH D+ is under 0.3V and D- is over 2.8V.
That huge 2.5V difference as well as a the paired representation means the chance of "corruption" from material difference is basically zero.
A logical one is when BOTH D+ is over 2.8V and D- is under 0.3V.
A logical zero is when BOTH D+ is under 0.3V and D- is over 2.8V.
That huge 2.5V difference as well as a the paired representation means the chance of "corruption" from material difference is basically zero.