Dear Technical Support Team,
I have a question about fraction function of LMX2572.
It doesn't work well.
I attached tcs file. E2E doesn't accept ".tcs" , so I changed ".pdf". If you download it, could you change from .pdf to .tcs?
【Question】
Could you please tell me about correct settings and execution sequence for fractional function ?
Our settings are below.
We are using attached tcs file.
OSC_2X=0
PLL_R_PRE=1
MULT=1
PLL_R=1
PLL_N[18:16]=0, PLL_N[15:0]=226
PLL_NUM[31:16]=0, PLL_NUM[15:0]=175
PLL_DEN[31:16]=0, PLL_DEN[15:0]=1000
CHDIV=2
FOUT=(20MHz*(226+175/1000))/2=2261.75MHz
【Problems】
Fractional function doesn't work well and shows "2260MHz". We expect "2261.75MHz"
FOUT=(20MHz*226)/2=2260MHz
【Additional Information】
・LOCK DETECT shows "LOCK".
・R0 is set at last for considering "double buffering"
・When double buffering is disable, fractional doesn't work
Best Regards,
ttd
