Refresh control circuit for controlling refresh cycles according to values stored in a register and related refreshing method

摘要

A refresh control circuit is provided for controlling refresh cycles according to values stored in a register. A related refreshing method is also provided. The refresh control circuit controls the refresh cycles so as to refresh data stored in memory cells. The refresh control circuit includes a refresh counter for generating a plurality of frequency division signals by dividing a clock signal in response to a refresh signal for directing a refresh operation. The refresh control circuit also includes a refresh activation signal generator for generating a refresh activation signal corresponding to the refresh cycle according to values stored in a register.