| 摘要 |
PURPOSE:To display a function as a fault diagnosing supporting device by removing a system resetting signal from the resetting factor of the fault diagnosing supporting device, and instructing by using the special address and the control data to reset the trouble diagnosing supporting device. CONSTITUTION:An address decoder 29 outputs the selecting signal when unit address bits A13, A12 and A11 used for accessing respective units connected to a system bus 21 are inputted and the unit address 111 of the fault diagnosing supporting device 23 is inputted. The selecting signal outputted from the address decoder 29 can write a resetting control register 28 composed of the flip flop. At such a time, when resetting control data D8=0 is given to the input of the resetting control register 28, an internal resetting signal *iRST is outputted from the resetting control register 28, and the resetting of respective circuits is executed in the fault diagnosing supporting device 23. Thus, the fault can be diagnosed by using the tracing data from the external part and the trouble cause can be suitably analyzed. |
