| 摘要 |
PROBLEM TO BE SOLVED: To enhance the economy by applying bus connection to other boards than a main control board with transmission reception and request lines respectively so as to reduce number of signals lines and to build up a system with excellent response in comparison with a conventional serial bus connection. SOLUTION: In this image forming device, a serial transmission data line 410 from a main control board 206 to control boards 204, 206, 208, 401-403, a serial reception data line 401 from the control boards 204, 206, 208, 401-403 to the main control board 20, and a request signal line 412 from the control boards 204, 206, 208, 401-403 to the main control board 206 are configured to be in common connection to the main control board 206 and the control boards 204, 206, 208, 401-408. |
