| 摘要 |
PROBLEM TO BE SOLVED: To provide a receiving device of a simple constitution which will not loose its function despite the power interrupt that occurs, when a control program is rewritten by preparing the 1st and 2nd storage means, copying a 2nd control program to the 2nd storage means from the 1st storage means and then acquiring a 1st control program to store it in the 1st storage means. SOLUTION: When a control program P is rewritten, a loader program Pr is first downloaded and written into a RAM 28. Then the program Pr is copied to a flash memory 27 from the RAM 28. A loader is rewritten, by having the program Pr of the memory 27 updated. Then the program Pr is copied to the RAM 28 from the memory 27. The program Pr is executed on the RAM 28, and a main body program Pm is downloaded and written into the memory 27, so that a main body is rewritten. |
