If computers were like the Catholic religion...

[giza]

Per nostra Pentium Quatro cum 2 gigahertzum e bus de cuatrocentum megahertzum...
Deo Gratie...
Per nostros Quinientum Doce megabaitum de RAMus...
Deo Gratie...
Per nostra GeForsum Duo Mu Omega cum centum ventiocho megabytum de memoria Delta Delta Rho...
Deo Gratie...
E por nostro casum de aluminum con sweetum modus e infinitum blinkenlightenus...
Amen

Comments

Re: Hmm.

[shockwave77598.livejournal.com]

I've never used that part. I have a few 68hc912b32 flash-based parts though and they have tremendous IO for a little 80 pin part. But yeah, there are serial input high and low side drivers as well. (speed up trick - only shift the column driver once to drive the next column rather than loading a whole new pattern. In a small array like this it's not an issue - when the array reachs 256 columns though, you start to look for ways to speed things up. :)

Re: Hmm.

[cjthomas.livejournal.com]

I've never used that part. I have a few 68hc912b32 flash-based parts though and they have tremendous IO for a little 80 pin part. But yeah, there are serial input high and low side drivers as well.

This is a little 8-pin part :). I wanted something I could solder on vector board, as opposed to something I'd need to fabricate a printed circuit board for. Very small amount of ROM, no RAM (just registers). Still surprisingly handy. Designed to be used (in a pinch) with no auxiliary components at all.

Drivers I'm considering are your standard 7000-series shift registers. They should be able to source and sink enough current on each pin for an acceptable display. If not, I'd add a transistor for sinking on each row.

All of this is academic, of course, until my thesis is out of the way (doing a good job of eating my life so far).