METHODS FOR OPERATING NONVOLATILE MEMORY DEVICES

摘要

PURPOSE: An operation method of a non-volatile memory device is provided to improve the operation speed of a system by processing commands after determining a priority about commands. CONSTITUTION: Expected operation times for a plurality of commands are calculated based on estimated operation times for a plurality of commands received form a non-volatile memory device(S40). The priority about a plurality of commands is determined based on the expected operation times and a predetermined rule(S41). The expected operation times and a plurality of commands are transmitted to the non-volatile memory device based on the priority(S43). When a delay times and a delay time is over a predetermined criteria, a specific command is determined to a top priority. When addresses corresponding to a plurality of write commands are overlapped, a write command which is to be precedently executed is determined to be a higher priority than a write command which is to be executed later.