Lpc2000

Hi,
few weeks ago I did similar design (320 x 240 LCD controller, with 
4/8 control lines). My sulution was based on ... LPC2106. It has 
enough RAM for LCD data and SPI (rather slow on this part) for data 
exchange. HIGHLY optimised asm code (for driving LCD) makes more than 
2.2MHz clock rate (>70Hz refresh).

Now I'm thinking about solution on LPC213x (single supply, faster 
SPI, price ..). The only dissadvantage is 3.3V (LCD requires 5V 
driving voltage), so 3/5V buffers are required for such displays.

Complete solution with small LPC213x is very simple (no glue to ext 
RAM, flexible) and comparable in price.

Grzegorz

www.savo.pl



--- In lpc2000@yahoogroups.com, "tonalbuilder2002" 
<twentiethwave@h...> wrote:
> 
> Thanks for your comments, Bob.  I was actually thinking about the 
> FPGA controller route, since I'm already using ACTEL A54SX's on 
> similar products...
> 
> http://www.kupercontrols.com/knode02.jpg
> 
> Been looking at the Optrex F-51447 product, which seems pretty 
> interesting and costs ~$60 @ 100 pieces...
> 
> http://www.optrex.com/SiteImages/PartList/SPEC/51477ade.PDF
> 
> I assume I can get away with a single buffer of display RAM just by 
> not clocking the display when I'm writing to the RAM, thereby 
> avoiding display glitching and conflicts with the LCD data reads.  
I 
> assume there's no visible artifact caused by starting and stopping 
> the display clock, does anybody know different?
> 
> Bill T.
> http://www.kupercontrols.com
> 
> 
> 
> 
> --- In lpc2000@yahoogroups.com, <bobengle@b...> wrote:
> > 
> > the epson sed series lcd controllers would work except they 
require 
> the use of a wait pin to sync the external bus. the only part which 
> worked on 8080/6800 busses has been lifetime buy'd.
> > 
> > most 320 by 240 parts require 4 data lines, clock, line and frame 
> pulses, with the pixel data being shifted by the clock.
> > 
> > i am rolling my own using a $6 actel fpga, and a $1 static ram. i 
> plan to use a spi interface so the part
> > can be used with any processor. simple circuit to implement
> > 
> > also found some nice cog modules with integrated el backlight and 
4 
> wire touchscreen for under $40
> > 
> > bob engle
> > embedded soutions
> >   
> > > 
> > > From: "tonalbuilder2002" <twentiethwave@h...>
> > > Date: 2005/03/06 Sun AM 12:38:03 EST
> > > To: lpc2000@yahoogroups.com
> > > Subject: [lpc2000] LPC2000's and Graphic Displays
> > > 
> > > 
> > 
> > 
> > 
> > [Non-text portions of this message have been removed]