SEMICONDUCTOR MEMORY DEVICE PERFORMING PARTIAL SELF REFRESH AND SEMICONDUCTOR MEMORY SYSTEM COMPRISING THE SAME

摘要

PURPOSE: A semiconductor memory device performing a partial self refresh and a semiconductor memory system comprising the same are provided to perform self refresh in only a specific region. CONSTITUTION: In a semiconductor memory device performing a partial self refresh and a semiconductor memory system comprising the same, a memory circuit(220) comprises a memory array A skip address storage(211) stores an address of a region in which the self refresh is not necessary as a skip address. A refresh address generation part(212) outputs the address of the memory array to be refreshed as a refresh address. An address comparison part(213) compares the skip address with the refresh address. The address comparison part outputs a refresh control signal to a memory circuit.