[SI-LIST] Re: Fw: 5V To 3V
- From: Matthias Weingart <si-list@xxxxxxxxxxxxxxxx>
- To: si-list@xxxxxxxxxxxxx
- Date: Sat, 13 Dec 2003 17:31:51 +0100
> 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
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