SEMICONDUCTOR MEMORY DEVICE THAT VARIES VOLTAGE LEVELS DEPENDING ON WHICH OF DIFFERENT MEMORY REGIONS THEREOF IS ACCESSED

摘要

A semiconductor memory device includes a semiconductor memory chip including a plurality of regions of memory cells, including a first memory region and a second memory region, and a memory controller configured to carry out a read of a memory cell in the first memory region by applying a first read voltage, and a read of a memory cell in the second memory region by applying a second read voltage that is different from the first read voltage.