Abstract: A memory access speed adjustment method, control device and memory module are provided. The method is for use in controlling a controller of a memory and includes steps of: obtaining a current temperature value of the memory; determining an access speed threshold of the memory according to a continuous variation relation with respect to a difference between the current temperature value and a target temperature value; and adjusting, by the controller, an access speed of the memory according to the access speed threshold.

Abstract: A method for extending period of data retention of a flash memory device and a device for the same are disclosed. In the present invention, the temperature of the flash memory device is detected by a temperature sensor. According to the temperature and P/E cycles of the flash memory device, a safe period is obtained for the data retention of the flash memory device. By refreshing each block of the flash memory device during the safe period, the data retention period is refreshed, and the data stored in the flash memory device can be prevented from bit error caused by exceeding data retention period or read disturb.