4 ms·
Hopefully you guys have ECC on your 64MB of SRAM, otherwise the meant time to bit flip due to Single Event Upset (SEU) is around 400 days ( based on 200 Fit/Mb/
by francoisLabonte 10y ago
Hopefully you guys have ECC on your 64MB of SRAM, otherwise the meant time to bit flip due to Single Event Upset (SEU) is around 400 days ( based on 200 Fit/Mb/Billion Hours from previous experience ).
- adapteva 10y agoNo ECC on chip, but we do have column redundancy. We are pushing the envelope in terms of SEUs, making an assumption that the right programming model and run time will be able to compensate for high soft error rates. It's a contentious point, but basically our thesis is that with 1024 cores on a single chip, cores are "free" and it "should" be possible to avoid putting down very expensive ECC circuits on every memory bank (x4096). Some of our customers don't notice all bit flips because they have things like Turbo/Viterbi ..channels aren't perfect...