Led display using basic stamp (is Max7219 better than Max6952 for this aplicati

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Thanks:

I am not an expert.
Somebody knows which is better for a led display
of about 40 leds x 20 characters x 80 leds each
one (total 40x20=800 leds)

MAX6952 or MAX7219?

About MAX6952:
http://pdfserv.maxim-ic.com/en/ds/MAX6952.pdf

Thanks: Joe


> --- Trygve Henriksen
<trygve.henriksen@v...>
> wrote:
> Greetings!
>
> I would say that the MAX7219, together with a
BS2P
> would be the best
> bet.
> The BS2P allows you to store DATA like
bitpatterns
> in unused Program
> banks, saving valuable room for your program.
> A complete map of each character will take 5Bytes
> for each, but that
would mean a 'vertical' mapping or bit-stuffing
> since the characters are
> 5bits wide.
> Setting up 8Bytes for each character, though,
> allows
> you to use assorted
> tricks like taking the 8bit ASCII value, shifting
> it
> 3 bits to the left
> and using that as a pointer to the correct
bitmap.
> A page is 2KB, so in theory it should be able to
> store 256 characters
> and symbols that way.
(and if you use several program pages, you could
> have alternate
> character or symbol sets, too)
>
> Trygve



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