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Help with lc7940 LCD

Discussion about LCD's and other related hardware

Moderators: _X7JAY7X_, caesar, IFR, mattcro, limbo, Fast351, hydrolisk1792

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Geduxaz
Posts: 2
Joined: March 5th, 2006, 11:01 pm

Post by Geduxaz »

hello. i think i have some kind of LCD.. with lc7940
it has a microcontroler LC7980 and also some unknown TOSHIBA M53512b-11rs

it has connector of 16 wires.. dislpay is from copy mashine.. has a backligt.. could anyone help me with connection o this lcd to PC or atmel?
if you want i could send you some photos.. :)

limbo
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Joined: February 13th, 2005, 7:38 pm
Location: Athens - Greece
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Post by limbo »

I can't say that your LCD is fully compatible with hd44780 but you can try the wirings :wink:
check this
http://www.doc.ic.ac.uk/~ih/doc/lcd/
and this
http://lcdsmartie.sourceforge.net/circuits.htm

ReverseEngineered
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Posts: 192
Joined: January 18th, 2006, 11:09 pm
Location: Saskatoon, Saskatchewan, Canada

Post by ReverseEngineered »

A quick search on Google tells me that the LC7980 is actually a controller for a Graphic LCD module. This definitely is not compatiable with the HD44780 used in most character LCDs. However, it has one very nice feature: it has a built in character generator. That means, using the write commands, you can almost treat it as if it were a character LCD. It's not entirely that simple, but it's a nice feature to have.

Smartie doesn't yet support this, but in the future I plan on writing some plugins to handle various Graphic LCDs. Since the only one I have is based on the SED1565 controller, I will be starting with that. However, most graphic controllers work almost the same (just different commands), so adding support for many different controllers shouldn't be too difficult.

However, this support won't be ready very soon, because there are many other changes I need to make to Smartie first. Keep checking back to see how progress is coming, and you just may find a graphic LCD plugin one day. :)

NOTE: Since your module isn't HD44780 compatiable, DO NOT hook it up according to those schematics! It's very easy to fry the controller by applying the wrong voltages to the wrong pins. Don't say I didn't warn you!

limbo
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Post by limbo »

OOPS
Rev is absolutely right!

http://www.datasheetcatalog.com/datashe ... 7980.shtml

This controller is for graphical LCD's

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