> > No SPI over long cable. For long cable RS422 will work, there is a > > tradeoff between cable length and speed. > > > Poor wording on my part. I had, once the terminations are sorted, visions > of a 3 to 4 foot cable, defined as a long SPI cable. > > Right now, terms are not well characterized on either end and it takes > some loading trickery to make a 6 inch cable work. Bertho and I spent > some time optimizing it to get 30.5 megabit one way, and 25 megabit > the other direction. And its now working well to a Mesa 7i90 with a 1" > cable.
Ethernet shielded twisted pair four pairs like this: sck+gnd, miso+gnd, mosi+gnd, chip select + gnd. Or flat cable with a gnd cable between each of them. Or of course Ethernet if available. ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
