US Patent 11360893 Apparatus and method for managing firmware through runtime overlay

A memory system may include: a non-volatile memory device suitable for storing firmware; a volatile memory device comprising a write cache region for temporarily storing write data to be programmed into the non-volatile memory device and a firmware cache region for loading the firmware from the non-volatile memory device; and a controller suitable for: moving, to the write cache region, changeable firmware data that is generated or modified in the firmware cache region during an operation of the controller; programming the changeable firmware data, after it is moved into the write cache region, into the non-volatile memory device; and generating, in the firmware cache region, access information of the changeable firmware data.