NON-VOLATILE SEMICONDUCTOR MEMORY DEVICE FOR SUPPORTING HIGH SPEED SEARCH IN CACHE MEMORY FUNCTION

摘要

A method for minimizing or decreasing a memory map table search time and a semiconductor memory device are provided to reduce a memory map table search time when a semiconductor memory device is used as a temporary memory of a large-capacity storage device to improve read performance. A memory map table search method in a semiconductor memory device having a volatile memory region and a non-volatile memory region includes a step of preparing a map RAM(Random Access Memory)(200), which stores map table data with respect to the non-volatile memory region, in the volatile memory region, a step of checking whether a logical address corresponding to a search target exists while loading map table data existing in a map storage region in the non-volatile memory region to the map RAM, and a step of outputting a physical address corresponding to the logical address when the logical address exists.