[SI-LIST] Re: Fw: 5V To 3V
- From: "Girish Bangalore" <bvg@xxxxxxxxxxx>
- To: <si-list@xxxxxxxxxxxxxxxx>, <si-list@xxxxxxxxxxxxx>
- Date: Sat, 13 Dec 2003 11:46:04 -0500
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
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