Re: [Lcd4linux-devel] lcd4linux timings for Samsung 16x4 display

[Michael R. <mi...@re...>]

Hello Dennis,

post a link to the datasheet, and your config, and I will have a look at it.

Maybe its not a timing issue, but a voltage issue: Some display require 5V signal level, and modern parports provide 
just 3.3V

In this case you have to use a level shifter (e.g. 74HCT245)

Am 2015-03-03 um 03:52 schrieb Dennis Grant:
> Hey there. I hope someone is still on this list.
>
> I have a display based on a Samsung 16T202DA1J 16x4 VFD. I have been
> using the HD44780 display driver with some success (every once and a
> while the display would overwrite a char to the left) but a recent
> motherboard upgrade and a change to a PCI based parport (yup, it is
> parport driven) has caused more problems.
>
> Given that is *almost* works - it's fine for a few minutes, then
> eventually corrupts - I think it is a timing issue.
>
> I have the datasheet PDF. Anybody feel like looking at it for me and
> telling me what timings I should be using?
>
> Thanks.
>
> DG
>
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Michael Reinelt <mi...@re...>
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