Maker Pro
Maker Pro

Basic LCD driver question

DanG

Feb 2, 2010
4
Joined
Feb 2, 2010
Messages
4
I am working on some older marine equipment that use either the Hitachi HD44780 or a NEC UPD16434 LCD driver. I believe that the drivers are bad as the two units work with the exception of a "fluttering" partial display. I get the outline of the 5x7 blocks, but nothing else and these flutter.

My question is: can I simply replace these drivers or do they contain programing that is specific to the LCD / equipment.

If they contain programing, can then be copied and then replaced?

Thanks!!

Dan
 

KrisBlueNZ

Sadly passed away in 2015
Nov 28, 2011
8,393
Joined
Nov 28, 2011
Messages
8,393
As far as I can tell from the data sheet, the only "programming" the HD44780U contains is the character ROM and there appears to be only one version of that. There is no code, as such. Its behaviour is controlled by registers that are programmed by the host.

I hope you have the tools to replace an 80-pin SMT device!
 

DanG

Feb 2, 2010
4
Joined
Feb 2, 2010
Messages
4
Thank you for the reply!!!! I am going to try to change the driver out and will let you know how it goes.

Thanks again,
Dan
 

gorgon

Jun 6, 2011
603
Joined
Jun 6, 2011
Messages
603
The only thing you could experience is that they contain a different character set.

If the display only flutters on a part it could also be the driver chips if you've got any, or a bad zebra strip.
 
Top