On Sun, Nov 28, 2010 at 1:50 AM, Oliver Seitz <[email protected]> wrote:
> > > If you don't have six > > pins, use one for data, one for clock and connect as many > > CD4094 8-bit-serial-to-parallel shift registers as you need. > > Err, sorry, my stone-age knowledge updated: CD4094 can do the job, but it > might not work with clock frequencies above 1MHz. Better use a 74HC164, it > does about the same thing, costs about the same money but easily works with > clock frequencies of 20MHz. > > Connect it to an SPI output port, and you have a cheap, convenient way to > have as many output pins as you want. > or MMC22925 or MMC22926 if displaying ASCII is not necessary BTW, standard multiplexing 8 digit plus 3 buttons in 12 IO pins, no external IC needed. Vasile -- You received this message because you are subscribed to the Google Groups "jallib" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/jallib?hl=en.
