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How to drive 320 x 240 LCD ?

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c8051f120 lcd

I know the topic might have been posted previously but i could't find it.
Most of 320x240 graphic LCD's have industry standard interface which includes D0..D3, CP1, CP2, FLM and M signals. From what i understood basing on datasheets the data display is written in 4-bit packets and then it's latched.
The question is if data must be written continously to maintain a static image on the screen (refreshing) or it is enough to write all the 320 x 240 pixels only once to keep static image on the display screen ?
 

320x240lcd

You have to constantly refresh the whole screen. If your CPU is fast enough,
320x240 B/W should not be a big problem. I've done it with C8051F120 and
320x240 Colour STN running at 3BPP. Refresh consumed ca. 40MIPS, leaving
60MIPS for the application. Look for "Circuit Cellar" October 2006 issue for details.

- Deni
 

I want a sample for drive this LCD ( bascom or C )
Can someone could help me?:roll:
 

Re: 320x240lcd

Hello!

You have to constantly refresh the whole screen. If your CPU is fast enough,
320x240 B/W should not be a big problem. I've done it with C8051F120 and
320x240 Colour STN running at 3BPP. Refresh consumed ca. 40MIPS, leaving
60MIPS for the application. Look for "Circuit Cellar" October 2006 issue for details.
Click to expand...

This very much depends on the LCD type. For instance this one:

has an internal DRAM, and you don't have to refresh it. It works with
a MSP430 microcontroller, reads data from a serial flash and displays it.

Dora.
 

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