smlogan
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Posts: 52
Boston, MA
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Dear neoflash,
> if I use dual-modulous divider as shown in the figure, what is the safe time > window to update the divider ratio control word P<N:0? > > Intuitively the safe window is to update the p<n:0> when all mod0-modn signals > are logic low. Not sure if this is correct and can assure the divider operates > glitch-free.
An approach I have used is to synchronize the divider option. p(N:0>, to the output clock. There will still exist a maximum input frequency, but this approach worked well for me.
Shawn
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