[PLUG] Driver question

Ken Stephens kennethgstephens at gmail.com
Fri Dec 11 19:30:17 UTC 2020


Galen,

Yes I did before I soldered it to the board.  Even checked the voltage:
3.22 V.

Thanks,
Ken

On Fri, Dec 11, 2020 at 11:19 AM Galen Seitz <galens at seitzassoc.com> wrote:

> On 12/11/20 10:52 AM, Ken Stephens wrote:
> > Jonathan,
> >
> > I've tried it on Tinkerboard,  Jetson Nano, my Fedora Linux Lenovo,
> wife's
> > Windows 8 Lenovo.
> > Tinkerboard - ubuntu arm7l, Linux
> > Jetson Nano - aarch64, Linux
> > Lenovo's Intels i7 and i5.
> >
> >   I am beginning to believe I blew the chip sometime.  But, it blinks
> like
> > the systems are trying to read its ID.  Without reading the ID, my
> systems
> > won't communicate with it.
>
> Did you switch the jumper on the FT232 module to 3.3V?  If not, the
> ft232 might be driving 5V into a pin that is expecting 3.3V.  That would
> likely cause excessive current to flow from the module through a clamp
> diode in the P8X32 to the 3.3V regulator.  Needless to say, this would
> be problematic.
>
> galen
> --
> Galen Seitz
> galens at seitzassoc.com
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