Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
(OP)
Hi,
Instead of using 2 separate oscillators, is there a way to generate both 33MHz and 64Mhz with 1 device?? The values don't divide evenly. Please let me know.
Thanks,
swb1
Instead of using 2 separate oscillators, is there a way to generate both 33MHz and 64Mhz with 1 device?? The values don't divide evenly. Please let me know.
Thanks,
swb1





RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
Thanks,
swb1
RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
The PLL approach would be to divide the 64 MHz by two repeatedly (2^6) to make 1 MHz as the reference. The PLL oscillator would oscillate at 33 MHz, and a sample of that would be divided by 33 (a tiny bit tricky) and phase locked to the reference. Since it is a fixed frequency (?), the loop parameters should be simple to work out.
Sometimes designers will aim for twice the desired frequency and divided by two as the last step to precisely even-up the duty-cycle.
RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
old field guy
RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
RE: Best Way To Generate 2 Clocks - 33 MHz & 64 MHz
swb1