| 摘要 |
PURPOSE:To exactly inform a state variation of each factor to a CPU, etc. at the time point of its generation, with reply to drive competition of a common line, by constituting a titled system so that the common line is made inactive temporarily in accordance with reset of a holding state after sensing the factor. CONSTITUTION:A variation of each state of factors A-C connected to an edge sense common line 1 is held by factor holding circuits 2-4, respectively. Also, a delaying circuit 6 delays a reset signal RESET for resetting each factor circuit 2-4, energizes a disable terminal of a driver 5 provided on the common line 1, by said delayed reset signal, and makes the common line 1 inactive temporarily. In this way, the common line 1 is returned to the previous state of driving, and after that, the common line 1 is driven again by a set output of the factor holding circuit 4 after the activity of the common line 1 is restored. |
