A method, system and apparatus to provide a solution of PLL locking issue in the daisy chained memory system. A first embodiment uses consecutive PLL on based on locking status of backward device on the daisy chained memory system with no requirement of PLL locking status checking pin. A second embodiment uses Flow through PLL control with a locking status pin either using an existing pin or a separated pin. A third embodiment uses a relocking control mechanism to detect PLL relocking from the device. A fourth variation uses flag signal generation to send to the controller.