Код
create_clock -name {clock} -period 20.000 -waveform { 0.000 10.000 } [get_ports {clock}]
получил критичиские предупреждения
Код
Critical Warning: From altera_reserved_tck (Rise) to altera_reserved_tck (Rise) (setup and hold)
Critical Warning: From altera_reserved_tck (Rise) to altera_reserved_tck (Fall) (setup and hold)
Critical Warning: From altera_reserved_tck (Fall) to altera_reserved_tck (Fall) (setup and hold)
Critical Warning: From clock (Rise) to clock (Rise) (hold)
Critical Warning: From clock (Fall) to clock (Rise) (hold)
Critical Warning: From clock (Rise) to clock (Fall) (hold)
Critical Warning: From altera_reserved_tck (Rise) to altera_reserved_tck (Fall) (setup and hold)
Critical Warning: From altera_reserved_tck (Fall) to altera_reserved_tck (Fall) (setup and hold)
Critical Warning: From clock (Rise) to clock (Rise) (hold)
Critical Warning: From clock (Fall) to clock (Rise) (hold)
Critical Warning: From clock (Rise) to clock (Fall) (hold)
от этого есть лекарство - нужно прописать времена задержек set_clock_uncertainty. Но какие они должны быть? Не понятно. Какие они должны быть для altera_reserved_tck и для clock?
