Hi!

The question that you ask is quite close to what i asked my guide(during industrial training). They were using FPGA's to generate the control signals and a LCD driver to drive the TN LCD. I asked him, why not use a microcontroller?

What my guide said was that the through-put of a microcontroller or a microprocessor is not predictable enough to be used to drive their matrix displays. His grouse was that the no of clock cycles per instruction aren't always the same.

These guys are very particular about timing. They do some real hard core research into LCD matrix addressing techniques at the institute. But what he didn't rule out was using the microcontroller! Although my question was related to using the uc for generating the control signals i guess the arguments quite valid for the drive circuit as well.

So i guess you could use the microcontroller, but the question of voltage levels required does creep in? That would depends on the LCD itself.

Also i guess you will need to generate pulses to the display on the TN LCD (since it is an rms responding device). SO if you are looking into driving the LCD then you will have to take into account the non-uniform machine cycle rates of the uc!!

hope this is some help. and please correct me if i am wrong!!:-) I still have to write the training report!!

cheers,

sushil

p.s. too many guesses!!! :-)