We are trying to operate this display (NHD-0220FZ-FSW-GBW-P-33V3) with 4 bits and have achieved absolutely nothing so far.
Now we are questioning if we have understood the data sheet and have all the correct connections we need.
First we tried connecting everything with DB0-DB3 grounded. Then we tried DB0-DB3 not connected. Now we have tried connecting to a header on the 12 pin side only. Still nothing.
All the voltages are there.
Interestingly, we have a 10k pot on the contrast and cannot get any change in the display from one end of the pot to the other. I figured this is strange because I would have thought this was a quite separate to actually configuring the display for operation.
Finally, thinking we may have copped a faulty display, we tried another and it is exactly the same - completely unresponsive. We have another 8 more but I suspect they will all be the same.
We can drive several other displays with our code, so I don't think we are too far out with what we are doing code wise.
Has anyone got some configuration code that we make some comparisons with? or are there an secrets with this display that we should know about.
Thanks in advance...
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