Steve, You may not be able to find a datasheet for the whole module. (I had the same problem, an LCD display controlled by a 44780, but no datasheet for the display). Go to Hitachi's web site and get the data sheet for the appropriate model of HD44780, use that to figure out pinouts to the header on the LCD module that will connect to the PIC, then search the PIC web-sites for any of dozens of examples of how to control the LCD from a PIC. I used info and code from Myke Predko's website (www.myke.com) and book. Thanks again to all who replyed to my questions when I was trying to get an LCD working. It is working now and I am really happy to have an easily usable debugging display. Adam You wrote... stevetom@GATE.NET on 12/11/98 12:12:06 AM Please respond to PICLIST@MITVMA.MIT.EDU To: PICLIST@MITVMA.MIT.EDU cc: (bcc: Adam Bryant/PEAK/MOORE) Subject: OT: HYUNDAI LCD HYUNDAI PCB16202...........HD44780a00//SEC636B-KS0065B (CHIPS) Anyone have a data sheet on the above LCD???? I have a bunch of them but Hyundai site has no data to download.... Thanks, STEVE