| 摘要 |
PURPOSE:To easily point a faulty one out of plural LSIs. CONSTITUTION:An information processor contains a bidirectional data bus (a), an input/output control circuit 16 which controls the input/output of data to the bus (a), and a data check circuit 15 which checks the input data received from the bus (a). Furthermore the LSI 11-14 which are connected to each other via the bus (a) are added together with an error register 17 which holds the errors detected by the circuit 15 in response to the LSI 11-14, and a bus emission register 18 which stores a fact whether each LSI inputs or outputs the data from or to the bus (a) and holds the value of the error registered in the register 17. |
