Hello,
I would like to create 25 MHz PLL out and I have found two PLL settings:
- Input clock is 27 MHz.
- Y7 is my target PLL in the attache TI Clock Pro capture file.
1. first settings (2015_1223)
M = 486
N = 3600
Pdiv = 8
2. second settings (2017_0217)
M = 243
N = 900
Pdiv = 4
The final output clocks are all 25 MHz.
- Fout = Fin/Pdiv x N/M (CDCE949 datasheet p.25)
My question:
Which is better settings between the two ones?
The first one is what TI clock pro shows to me.
The second one is what I have changed from the first one in such way to make the M, N and Pdiv smaller.
The attached files are TI Clock pro capture files for the two settings.
Thanks.