1. A control device coupled between a first memory and a second memory, comprising: an execution unit executing a specific instruction set to transmit data between the first and the second memories; a first storage unit configured to store a first instruction set; a second storage unit configured to store a second instruction set; a selection unit outputting the first or the second instruction set to serve as the specific instruction set according to a control signal; and a processing unit generating the control signal when the execution unit completes the specific instruction set, wherein the processing unit writes the first instruction set to the first storage unit and writes the second instruction set to the second storage unit, wherein the first memory is an NAND flash memory, and the second memory is an static random-access memory (SRAM), wherein the second memory and the control device are integrated into a memory device, and the first memory is disposed outside of the memory device.