How many enable lines should a 55 x 2 Character LCD have?

Parts Questions
1

Hi,

Just a quick question as to how many enable lines should a 55 x 2 character LCD have? I thought it would have 2, but I got my hot little hands on one of these displays (sorry guys, it was a one off) and it seems to only have 1.

i.e. 16 connections - 2 for backlight and 14 for all the other usual stuff.

I have to work out the pinout now as no datasheet is available because it’s an OEM. Do you think it pretty safe to assume the pinout is standard?

Regards

Rowan

2

You sure that’s a 44780?

Check this out: http://home.iae.nl/users/pouweha/lcd/lcd0.shtml#_2_line_displays

As you can see there’s no provision for lines > 40 characters traditionally speaking, but there are ample addresses available so it’s possible.

I assume the driver IC’s have a gob of glue on em and you can’t read any numbers off them?

3

You’re right about the glob of glue on the IC’s.

I’ll look at that site on my lunch brake.

Thanks