Precharge method of semiconductor memory device for contorlling precharge starting time of each bank at bank precharge operation and semiconductor memory device using it

摘要

The present invention discloses a semiconductor memory device having the pre-charging method of the semiconductor memory device and a method that can adjust the operation time of each bank-specific precharge when the bank precharge operation. The semiconductor memory device of the present invention the pre-charge operation time for each bank based on the bank by activating or light sequence latch when the pre-charge operation for latching the sequence performing the activation or write operation for each bank, and a plurality of banks by adjusting the differently, to start a plurality of banks at different times, the pre-charge operation. Therefore, the power supply noise can be reduced, it is possible to perform a stable pre-charge operation.