Method for hiding a refresh in a pseudo-static memory with plural DRAM sub-arrays and an on-board address decoder

摘要

A method and device for hiding refresh operations during accesses to sub-arrays of a pseudo-static memory device. By refreshing sub-array_j while filling the row R_i (where i<>j) corresponding to sub-array_i, refresh operations can be performed without risking that a read request will interrupt the refresh operation. Additional refresh operations of sub-array_i can be performed serially with the operations of filling the row R_i without delaying the overall burst read or write operation if the burst is made sufficiently long.