systems , controllers and methods are disclosed , such as an initialization system including a controller that receives patterns of read data coupled from a memory device through a plurality of read data lanes . the controller is operable to detect any lane - to - lane skew in the patterns of read data received through the read data lanes . the controller then adjusts the manner in which the read data received through the read data lanes during normal operation are divided into frames . the controller can also couple patterns of command / address bits to the memory device through a plurality of command / address lanes . the memory device can send the received command / address bits back to the controller through the read data lanes . the controller is operable to detect any lane - to - lane skew in the patterns of command / address bits received through the read data lanes to adjust the manner in which the command / address bits coupled through the command / address lanes during normal operation are divided into frames .