At 08:33 AM 11/30/00 -0600, Lawrence Lile wrote: >Thanks, Paul, I didn't even realize Philips was into LCD drivers! > >I may also experiment with Dwayne Reid's suggestion of using shift >registers. I have to count pennies on this project. Give it a try - you might be surprised at how easy it is! One thing I probably forgot to mention - you need 22 SR outputs to drive the segments. One of the remaining 2 outputs will drive the back-plane, leaving you one output pin that you can do with as you please. It takes 3 pins to drive the SR chain and you can get back 2 of those pins as inputs. Theoretically, you could knock the PIC pin requirement down to 2 pins by coupling either the data line or the clock line to the latch input via a RC delay. Works great on the TPIC6x595 but the 74hc595 does not have schmitt trigger inputs and the latch edge is too slow to work reliably. I've got ugly code I could share - its ugly because of the amount of stuff I get a lowly 12c671 to do. But it works and it is maintainable. dwayne Dwayne Reid Trinity Electronics Systems Ltd Edmonton, AB, CANADA (780) 489-3199 voice (780) 487-6397 fax Celebrating 16 years of Engineering Innovation (1984 - 2000) * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * Do NOT send unsolicited commercial email to this email address. This message neither grants consent to receive unsolicited commercial email nor is intended to solicit commercial email. -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.