Patent ID: 6862248

Claim:
A method for masking a ringing phenomenon in a DDR SDRAM, the method comprising the steps of: in a write mode, generating a first and a second synchronizing signal by means of a DQS signal inputted from an exterior circuit, in order to synchronize input data; latching data in odd sequences from among the inputted data, which are sequentially inputted, at a rising edge of the first synchronizing signal, and latching data in even sequences from among the inputted data, which are sequentially inputted, at a rising edge of the second synchronizing signal; aligning the data in odd sequences and the data in even sequences at a falling edge of the DQS signal so that the odd and even sequenced data has the same synchronized timing; and blocking activation of the second synchronizing signal by means of a first control signal, the first control signal being synchronized with the falling edge of the last valid DQS signal that is normally inputted, so as to enable the blocking step and thereby masking the ringing phenomenon.