i never connected these pins and it was never a problem. if you check them with a voltage meter, you will probably see that the 44780 has internal pull-downs... tino Erik Jacobs Gesendet von: pic microcontroller discussion list 26.06.02 07:51 Bitte antworten an pic microcontroller discussion list An: PICLIST@MITVMA.MIT.EDU Kopie: Thema: [EE]: Hitachi 44780 LCD controller -- 4bit mode pin "termination" ? When using the Hitachi 44780 (or equivalents)... if you are using the 4-bit mode how should you terminate the connections to the remaining pins? The datasheet itself makes no mention of the other pins (DB8+) so are they simply not connected? Once the device is "set" to bein 4-bit mode it would then appear to become irrelevant... but what about during initialization? -Erik -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads -- http://www.piclist.com hint: PICList Posts must start with ONE topic: [PIC]:,[SX]:,[AVR]: ->uP ONLY! [EE]:,[OT]: ->Other [BUY]:,[AD]: ->Ads