Hi
I just got an Epson graphical display off an internet auction. The model number is EG7504C-RS and it has 320x200 pixels. I have the data sheet, but it doesent tell anything about what controller it uses (if it has any), only pinout, function specifications and adressing. I tried to connect the display directly to the lpt port guided by a schematic for a simular display from Liquid-MP3 (
http://liquid-mp3.schijf.org/schematics/Hyundai_HG25504.gif). It basically had the same ports, only in a different pattern, so i conneced it to fit the data sheet of my display. I also added a supply voltage of 3,3V and a LED voltage (display) of 2V as specified in the data sheet.
The problem is that nothing really happends when i connect it to the parallell port. I didnt know what controller to use so i tried a bounch of them, and a few different programs. At one point the backlight lit up, but i havent been able to reproduce the effect. I also tried to control the ports directly to match the display on/off control, but i didnt get it to work.
So my question is, what can i try now? I'm also not sure if pin 1 on the lcd cable starts from the top or the bottom, any suggestions here? I will gladly add some pictures or info from the data sheet if that could clear things up.
Help would be greatly appreciated! Sorry about the long post
Pinout:
1:Vdd 2:LED+ 3,4:Vss(ground) 5:Reset 6:CS 7:RD 8:WR 9:A0 10:Vss 11-18:DB0-DB7