hi all
thanks a lot for the post, they are really helpful.
first of all to clear with, i want scroll functionality in the screen, thence will be using (left right, up, down) keys also. so that's make total of 20 keys(4X4 + 4)
also, i need to make a simulation of the schematic, are there some good software available on which i can put in all hard wiring and check if the interface had been working as i want.
@microcontroller board, the board seems to be useful, but i want to use a 128*64 graphical LCD + the scroll keys as i discussed above. there is also USB in the board, but i require a memory card interface(though a USB interface can be an added advantage, but memory card is mandatory). Is there something which meets these requirements? or can anyone build a board like that for me on cost!
thanks everyone for helping me out.