| 摘要 |
PROBLEM TO BE SOLVED: To allow a loader program storage area of a storage device to be rewritten based on the data transmitted from outside only when rewrite mode is set. SOLUTION: When a boot area rewrite permission mode flag is set to be on (S512: YES), it is constituted that a boot loader area is rewritten in accordance with loader program data received from an external transmitter by way of a reception device (S520 to S580); when the boot area rewrite permission mode flag is off (S512: NO and S514: NO), it is constituted that reception data are read away (S516). Only when the boot area rewrite permission mode flag is set to be on, rewrite of the loader program is made possible. |
