On 18/06/2020 12:13 pm, Tim Albers wrote:
> Hello,
>
> I have a short question and I hope you can help:
>
> as I understand it the first release of the Pi 4 had issues with the
> USB-C port.
>
> Has that been fixed and a new hardware revision is released and if so
> how can I tell if an online shop is selling the fixed version?
>
> Thanks for your help.
>

 From Tom's Hardware:

The problem had to do with the Pi 4's USB Type-C port, which it uses to
receive power. The way that the port was constructed meant that it would
not work with high-speed, "e-marked" cables. We tested a wide number of
cables to see which would work, but found that most cables did not have
any issues.

In short, if you have a USB 3.1 5 or 10 Gbps cable, chances are that it
it is "electronically marked" while USB 2.0 cables are just fine. The
high-speed cables require two pull down resistors on the Type-C port,
because they use two lines to talk to the system. The original Pi 4 had
only one resistor so these cables won't work with it.  Considering that
the Pi 4's USB-C port is only usable for charging, chances are that you
wouldn't want to use a high-speed data cable with it anyway.

https://www.tomshardware.com/uk/news/raspberry-pi-4-usb-c-cables-that-work,3986
9.html

--

Chris Elvidge, England

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