| 摘要 |
PURPOSE:To prevent the abnormality of a control package from exerting the influence on a main function of a device by transferring the abnormality of the control package to a package group and making a control signal invalid at the time of generating abnormality of the control package in each package to be controlled. CONSTITUTION:A control package 10 transmits a control signal (a) and a control package abnormality signal (b), and a control bus 40 transfers the control signal (b) to a package 20 to be controlled. The package 20 to be controlled performs an intrinsic function in accordance with the control signal (a), and a signal line 50 transfers the control package abnormality signal (b) to the package 20 to be controlled. In the package 20 to be controlled, a detecting circuit 22 detects the control package abnormality signal (b), and when a gate control signal (d) is generated to a gate circuit 21, when the gate signal (d) is significant, a gate is closed so that the control signal (a) is not transferred to a main circuit 23. In such a way, it is possible to prevent abnormality of the control package 10 from exerting the influence on a main function of a device. |
