> As far as I understand, this "behaviour" is totally deterministic and certain. You immediately notice the problem in any test system. FTDI does not provide a

> As far as I understand, this "behaviour" is totally deterministic and certain. You immediately notice the problem in any test system. FTDI does not provide any guide lines to third parties how to test whether their chips are counterfeit or not. The only way to test it is trying to use it with FTDI's Windows driver, and FTDI randomly changes the both the detection criteria, and the action done on detecting a counterfeit chip – sometimes it bricks them, sometimes it sends gibberish, you have no way of knowing beforehand. FTDI doesn't even guarantee that this behaviour is deterministic!