MEMORY CONTROLLER FOR CONTROLLING REFRESH PERIOD OF MEMORY AND METHOD FOR CONTROLLING REFRESH PERIOD, ESPECIALLY IMPROVING OPERATIONAL PERFORMANCE

摘要

PURPOSE: A memory controller for controlling the refresh period of a memory and a method for controlling the refresh period are provided to improve the operational performance by setting a refresh period appropriate to the operational state and temperature of the current memory. CONSTITUTION: A method for controlling the refresh period of a memory includes the steps of: (a) generating(110) the temperature measurement command to measure the operational temperature of the memory by a predetermined time; (b) receiving(120) the measured temperature in response to the temperature measurement command; (c) going back to the step (a) if the measured temperature is equal to the reference temperature; and (d) applying the refresh command to the memory in response to the changed refresh period.