[SOLVED] how to know the frequency of clock in followjng MMCM instantiation code

[syedshan]

hello every one,

in MMCM_ADV I have following clock parameter values and for CLKOUT0

  mmcm_adv_inst : MMCM_ADV
  generic map(
...
    DIVCLK_DIVIDE        => 1,
    CLKFBOUT_MULT_F      => 6.000,
    CLKFBOUT_PHASE       => 0.000,
    CLKFBOUT_USE_FINE_PS => FALSE,
    CLKOUT0_DIVIDE_F     => 3.000,
    CLKOUT0_PHASE        => 0.000,
    CLKOUT0_DUTY_CYCLE   => 0.500,
    CLKOUT0_USE_FINE_PS  => FALSE,
)

port map(
...
...

 CLKOUT0             => clkout0,
)

My question is, that my input frequency is 130 MHz, it means that the output frequency = INP_freq *( CLKFBOUT_MULT_F/ (CLKOUT0_DIVIDE_F* DIVCLK_DIVIDE) )

right?

i.e. output freq = 130 * (6/3) => 260 Mhz

this seems like quite amateur question but I never used MMCM with instantiaion and although I am pretty much sure it is the way I have guessed, but to ask is just to confirm...


thanks for time ^_^

 

[mrflibble]

I think your 260 MHz is correct.