| 摘要 |
PURPOSE:To decrease the man-hour and cost required for the updating of a program by providing a programmable ROM storing a program for updating or changing a program for operation control sent from a base station so as to facilitate the updating of the function of program. CONSTITUTION:In a mobile station on automobile, in order to improve the function of program for operation control stored in advance in the programmable ROM 9, the updated program sent through an automobile radio communication line from the base station corresponding to a radio zone where the automobile resides is received and demodulated by a receiver 4 via an antenna 1 and a duplexer 2 as a data signal. Moreover, in a digital signal modulator-demodulator 7, a received demodulation signal is decoded and stored as the updated program in the ROM 9 through the data processing action by a processor 8 and a RAM 10. When the storage of the updated program to the ROM 9 is finished, a start address of a new program for control is set via the end of call processing and the state is restored to the state restarting the operation control. |
