LCD STN info - [Crystalfontz]

[bcbox]

Just wanted to add my findings here.

I'm using a Crystalfontz CFAH1602B-TMC-JP 16x2 negative transmissive LCD.

The datasheet shows that there's possibly a negative voltage generator built into the package. It doesn't actually say which models have it and which don't. I have determined that at least this model does indeed have a negative voltage generator built in, so Vo is just positive voltage just like normal LCD's. No need to have to generate a -5v supply just for the LCD - just give it Vo from the regular 5v supply and it'll take care of the rest. This also helps when using the midibox core module - you can just use everything as it is.