CONTROL METHOD OF MEMORY DEVICE FOR PERFORMING WRITE LEVELING OPERATION, WRITE LEVELING METHOD OF MEMORY DEVICE, MEMORY CONTROLLER PERFORMING WRITE LEVELING OPERATION, MEMORY DEVICE AND MEMORY SYSTEM

摘要

PPROBLEM TO BE SOLVED: To provide a control method of a memory device for performing write leveling operation, a write leveling method of the memory device, a memory controller performing write leveling operation, a memory device and a memory system. PSOLUTION: The control method of the memory device includes steps of: generating a clock signal to be transmitted to a memory device; generating a data strobe signal to be transmitted to the memory device; generating a command signal and a write leveling control signal to be transmitted to the memory device in write leveling operation; detecting, in write leveling operation, a phase difference between a command signal and a data strobe signal received from the memory device in response to the write leveling control signal; and adjusting, in writing operation in a normal mode of the memory device by the detected phase difference, the generation time of data strobe signal to a clock signal. PCOPYRIGHT: (C)2011,JPO&INPIT