| 摘要 |
PROBLEM TO BE SOLVED: To enable executing restoration even when abnormality such as power source disconnection, etc., occurs in the midst of the updating of a system program and also to facilitate addressing at the time of updating in a communication equipment having a function for updating the old system program into a received new system program. SOLUTION: A communication equipment is provided with a non-volatile memory 3 storing the system programs and RAM 2a with a back-up function whereby the old system program is temporarily stored at the time of updating and also a power source is supplied by a battery at the time of power source disconnection and constituted so as to store the new system program received based on the old system program which is stored in RAM 2a with the back-up function in the non-volatile memory 3. An address space control part 4 which mutually exchanges the address space of the non-volatile memory 3 and the address space of RAM 2a with the back-up function at the time of updating is also provided. |
