A phase-locked loop

A phaselocked loop, and for fixing the definition phaselocked loop operating mode data first register set (21); For limiting the definition phaselocked loop operating mode data and register set (22). The switch (27 to 30) is used for a handle a first and a group of a register set, a receiving definition phaselocked loop novel operating mode data, and at the time, and other group of a register set is connected to the phaselocked loop, a movable the mode of the other group of register groups defined similar. The switch redeploy capable of changing joint, so the other group of register groups to and reception definition updating operating mode the data, and at the time, a register set is connected to the phaselocked loop is connected with the new operating mode.