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List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 13 Nov 2019 21:13:25 -0000 On Wed, 2019-11-13 at 21:48 +0100, Bernd Walter wrote: > [...] > Ok - the FT4232H mini module won't even probe on USB :-( > I have another FT4232H, which probes fine, but has RS232 transceivers. > A board with - I assume - a genuine CH340G shows exactly the same problem. > Tomorrow I will hook up a logic analyzer to see what really happens on > the wire. > The 4232 minimodule claims that it needs 150ma, so it fails to attach if connected to a bus-powered hub. (Maybe it could pull 150ma if all channels were running max speed and driving activity LEDs, but otherwise it more like actually uses 30-40ma.) -- Ian