| 摘要 |
PURPOSE:To shorten the check time of the counter and make the on-delay operation possible, by switching the number of output stages of the counter according to the input voltage. CONSTITUTION:When input voltage VS is 1/3VDD or less, outputs V01 and V02 of gate circuit 7 are L level, and the number of output stages of counter circuit 2 is switched by the input of input terminal R. When input voltage VS is 1/3VDD- 2/3VDD, output V01 of gate circuit 7 becomes H level, and the test mode output is set to connect counters F1 and F1'. When input voltages VS is 2/3VDD or more, output V02 of gate circuit 7 becomes H level to reset all counters. Then, the on-delay operation is possible to changing input voltage VS from the H level to the L level. |
