This invention makes is possible to protect programs and shorten the activation time of an electronic apparatus even if a non-volatile memory such as an MRAM stores the programs including a boot program, and is used as a main memory. Upon power-on or receiving a reset signal, a program stored in bank 102 of the non-volatile memory is transferred to another bank. Upon completion of the transfer operation, to disable access from the outside of the non-volatile memory to the bank 102 to protect the bank 102, the bank is set in a disconnection state in the non-volatile memory. A signal indicating completion of the program transfer operation is output to the outside, and a reset-release signal to a processor is generated using the signal as a trigger.