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Re^4: i2c lcd Custom Characters

by anita2R (Scribe)
on Jun 11, 2016 at 20:01 UTC ( #1165406=note: print w/replies, xml ) Need Help??

in reply to Re^3: i2c lcd Custom Characters
in thread i2c lcd Custom Characters


As far as I know, none of the Pi's pins are 5 volt tolerant, it is only when configured and used with the i2c bus that they are tolerant.

If these same pins were reconfigured to general purpose use, they would not be 5 volt tolerant.

I think that the issue is the way that the i2c bus operates and how it is pulled up/down.


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Re^5: i2c lcd Custom Characters
by jmlynesjr (Chaplain) on Jun 12, 2016 at 20:30 UTC


    Thanks for the info. Something to pay attention to if I ever decide to play with the RPI. It's starting to become popular in Ham radio circles.

    The Digilent docs state that the PIC32 digital I/O pins are protected but the analog I/O pins are not. Digilent adds protection diodes for the analog pins on their UNO32/uC32 boards.


    There's never enough time to do it right, but always enough time to do it over...

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