1753 - LatticeXP2 : How fast can the dynamic phase ports be changed and will this cause glitches?

1753 - LatticeXP2 : How fast can the dynamic phase ports be changed and will this cause glitches?

Phase changes can be made very quickly, up to once every clock cycle.

When the dynamic phase inputs of the LatticeXP2 PLL are switched, it is possible that glitches and cycle skips will occur due to the potential timing differences on the dynamic phase inputs.

For further information regarding the LatticeXP2 PLL dynamic phase ports, please see TN1126, "Dynamic Phase/Duty Mode".