| 摘要 |
PROBLEM TO BE SOLVED: To provide a multifunctional device capable of efficiently and surely updating a necessary control circuit program vrithout requiring work such as the substitution of a ROM in a control circuit and an interface in each control circuit. SOLUTION: In the multifunctional device having plural control circuits each of which is provided with a CPU, an electrically rewritable memory and a communication means, a main control circuit 110 is provided with a function for receiving rewritting data from external equipment and delivering the received rewritting data to circuit boards 130, 140, 150 provided with electrically rewritable memories to be rewritten by the rewriting data respectively. |
