I2C LCD Driver? - Electronic Circuits Projects Diagrams Free

brodin · 5th April 2004, 09:38 AM

I need a driver to a 6 x 7segments LCD. It is going to fit in my uC project where i have not a lot of free I/O's.
So i would need a LCD driver with for example I2C bus interface.

Do anyone have experience about that?

This is the LCD i will drive: (the lcd at the bottom)
http://www.elfa.se/elfa/produkter/en/2011641.htm

I have found this: (PCF8566P)
http://www.elfa.se/elfa/produkter/en/2013468.htm

Is this a good way of doing it, or is it better to buy a 16F88 and write my own lcd driver and multiplex to 6 lcd digits? It is 6 to much to multiplex, will the digits be weak?

**Nigel Goodwin** · 5th April 2004, 09:42 AM

Quote:

Originally Posted by brodin

Is this a good way of doing it, or is it better to buy a 16F88 and write my own lcd driver and multiplex to 6 lcd digits? It is 6 to much to multiplex, will the digits be weak?

I would suggest it's a far better way to use a PIC, by using a simple serial interface you would also only need one I/O pin to drive it. Multiplexing 6 digits isn't a problem, and presumably the display is designed to be used in that way?.

brodin · 5th April 2004, 10:04 AM

Ok, thanks!

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5th April 2004, 09:38 AM	(permalink)
brodin	I2C LCD Driver? I need a driver to a 6 x 7segments LCD. It is going to fit in my uC project where i have not a lot of free I/O's. So i would need a LCD driver with for example I2C bus interface. Do anyone have experience about that? This is the LCD i will drive: (the lcd at the bottom) http://www.elfa.se/elfa/produkter/en/2011641.htm I have found this: (PCF8566P) http://www.elfa.se/elfa/produkter/en/2013468.htm Is this a good way of doing it, or is it better to buy a 16F88 and write my own lcd driver and multiplex to 6 lcd digits? It is 6 to much to multiplex, will the digits be weak?