PaulJ wrote: Wed Nov 07, 2018 11:07 pm
So out of curiosity the article you wrote on the mega accelerator where you have 10k or 4.7k rp's as a problem and need to be changed to 2.2k. Does that stay the same? What caused your change from 2.2k resisters?
The STF board doesn't suffer from ringing or other issues that other boards do... tests on STFM, STE I tested 4.7K on the STE, and it wasn't 100% stable, so I moved to 2.2K, its what is needed... BUT, I think somewhere around 1.8K the DMA starts to screw up... so 2.2K is a bit "close".
In anycase, the STF board should be a lot easier to drive, CMOS CPU, ROM, not driving "old" power hungry RAM chips.. less ringing problems on signals...
I went with 2.2K as it was "normal" in my mind, but later thought 4.7K should be fine and probably better than 2.2K... So nothing has changed with my thoughts about STFM, STE, BUT my board is different where I changed my thoughts to using 4.7K on there...