Tiny12 100 ppm Tiny45 3000 ppmI measured this by watching edge jitter over 5 second intervals for edges that were from 2us to 20 ms apart. I made these measurements with my digital scope using 5-sec variable persistence and window-delay (old b-delay). I thought that the Tiny45 might be inserting wait-states non-deterministically in the ram accesses. The new part has a ram and keeps the return address stack in it. But I was able to rule this out by observing the internal clock directly using a new fuse option that routes the internal clock to an output pin.
I'm sitting here thinking that I should try a few more parts before I get too discouraged. I'll let you know if I discover part to part variation. But for now the conclusion is that the new part can't do one chip video. Bummer.
|Last edited March 4, 2006
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