Hi all!
I've updated FMC116 Reference Design, replacing sip_mac_engine for my own star, communicating through AMBA to an IP-CORE that LEON3 can access. It means I don't need ethernet at all, cos everything runs inside my board (Xilinx Virtex ML605)
Trying to understand the usage of sip_fmc_ct_gen, I cannot see connections of the resulting clocks in the ref design, and I read in doc files that main purpose is offer a clock and trigger signal during factory tests. Besides, rx and tx are supposed to be used with ethernet, and as said before, I don't need it.
So my questions are:
1.- Is this star really used/needed in the Ref Design?
2.- what is it used for if yes?
3.- If not used, I understand It can be deleted with no consequences off course
4..- Why when reference soft executes, when printing trigger frequency, a value of 0.2Mhz is shown?
I can read in doc "The trigger output is connected to the command clock. This results in a 125Mhz single ended output".
I assume the printed one is another trigger clock, may be the external one. Or may be is just the result of calculate the
frequency of soft triggers during execution time?
5.- I assume that the star is "just a wrapper" to GTX Wizard generated core, so it can be used as a PLL to produce any clock signal. Is that right?
Thanks once more!!!
Víctor Martín, IEEC