Choose between Raspberry Pi 4B 4GB and ROCKPro64

[Ian Lepore]

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