> From: andy pugh [mailto:bodge...@gmail.com] > > On Fri, 9 Apr 2021 at 17:40, John Dammeyer <jo...@autoartisans.com> wrote: > > > Your photo of the 7I80 is clearer than the one on the MESA site. But I > > can't figure out what the difference is between the 7I80DB-16 > and -25. Which one do you have and why? > > It's a "16" as it has a 16 k-gate Startan 6 FPGA. The "25" has 25 k-gates. > > You can fit a bigger, more complicated, firmware on the 25k one. I am > not sure if any 7i80 firmwares need the 25kgates. > > I have the one that I have because that's the one PCW gave me as a > development sample ;-)
Ah! Now that makes sense. Possibly the larger could be used to allow a non-firmware reprogramming to allow step/dir _or_ pwm/dir on the same two pins. Right now my MESA 7I92H can't do that while an Ethernet Smooth Stepper with MACH can. But that's an apples and oranges comparison from what I understand because of what happens inside the FPGA on both. John > > -- > atp > "A motorcycle is a bicycle with a pandemonium attachment and is > designed for the especial use of mechanical geniuses, daredevils and > lunatics." > � George Fitch, Atlanta Constitution Newspaper, 1912 > > > _______________________________________________ > Emc-users mailing list > Emc-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/emc-users _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
