An electronic device includes a first memory controller, a second memory controller, and a memory access controller. The first memory controller stores setting information of a predetermined memory, wherein the predetermined memory is defined as an execute-only-memory. The second memory controller provides and sets an enabling register according to the setting information of the predetermined memory, and generates an enabling signal. The memory access controller accesses the first memory controller and the second memory controller to move the data of the predetermined memory to a predetermined memory space corresponding to the enabling register according to the enabling signal and the setting information of the predetermined memory.