Matthias, By setting the VCC of LCD to 3.3V, how are we going to solve the interfacing issue between the uC and the LCD controller? Can you please elaborate? Girish ----- Original Message ----- From: "Matthias Weingart" <si-list@xxxxxxxxxxxxxxxx> To: <si-list@xxxxxxxxxxxxx> Sent: Saturday, December 13, 2003 11:31 AM Subject: [SI-LIST] Re: Fw: 5V To 3V > > Let me know which LCD controller IC you are using. Most of them have inputs > > which are 5V tolerant. As far as the Micro is concerned it can always accept > > 3.3V signals from the LCD controller. > > Just set the VCC of the LCD to 3.3 volts and use a negative VPP. > Most modern LCD controller are working at 3volts too. > (maybe you have a MAX232 and already a negative voltage on board or > use a toggling port pin of your uC and two diodes and C's to create one). > > http://elm-chan.org/docs/lcd/lcd3v.html > > Matthias > ------------------------------------------------------------------ > To unsubscribe from si-list: > si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field > > or to administer your membership from a web page, go to: > //www.freelists.org/webpage/si-list > > For help: > si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field > > List technical documents are available at: > http://www.si-list.org > > List archives are viewable at: > //www.freelists.org/archives/si-list > or at our remote archives: > http://groups.yahoo.com/group/si-list/messages > Old (prior to June 6, 2001) list archives are viewable at: > http://www.qsl.net/wb6tpu > > ------------------------------------------------------------------ To unsubscribe from si-list: si-list-request@xxxxxxxxxxxxx with 'unsubscribe' in the Subject field or to administer your membership from a web page, go to: //www.freelists.org/webpage/si-list For help: si-list-request@xxxxxxxxxxxxx with 'help' in the Subject field List technical documents are available at: http://www.si-list.org List archives are viewable at: //www.freelists.org/archives/si-list or at our remote archives: http://groups.yahoo.com/group/si-list/messages Old (prior to June 6, 2001) list archives are viewable at: http://www.qsl.net/wb6tpu