| 摘要 |
PURPOSE:To protect plural status signals even when devices are shared. CONSTITUTION:This circuit is equipped with plural sampling circuits 1-i which sample the presence/absence of the plural status signals, a counter circuit 2 which performs up-count and down-count corresponding to the output of each sampling circuit 1-i and is used commonly for each sampling circuit, and a memory circuit 3 which stores the count value of the counter circuit 2 at each status signal. Also, it is comprised in such a way that an interface control circuit 4 which performs counting at the counter circuit 2 at each status signal setting the output of each sampling circuit 1-i as input, and also, performs storage on the memory circuit 3 is provided. |
