altpll_component 问题

柠檬dz

altpll_component 问题 [复制链接]

defparam
  altpll_component.clk0_divide_by = 1,
  altpll_component.clk0_duty_cycle = 50,
  altpll_component.clk0_multiply_by = 2,
  altpll_component.clk0_phase_shift = "0",
  altpll_component.clk1_divide_by = 1,
  altpll_component.clk1_duty_cycle = 50,
  altpll_component.clk1_multiply_by = 2,
  altpll_component.clk1_phase_shift = "-3000",
  altpll_component.compensate_clock = "CLK0",
  altpll_component.inclk0_input_frequency = 20000,
  altpll_component.intended_device_family = "Cyclone II",
  altpll_component.lpm_type = "altpll",
  altpll_component.operation_mode = "NORMAL",
  altpll_component.pll_type = "FAST";

中的 altpll_component.clk0_divide_by = 1,
altpll_component.clk0_duty_cycle = 50,
altpll_component.clk0_multiply_by = 2,
altpll_component.clk0_phase_shift = "0",有什么作用啊