| 摘要 |
PURPOSE:To execute exactly an ordinary operation, and also to decrease the number of terminals, by constituting so that a test signal from a test state setting circuit can be generated only at the time of reset. CONSTITUTION:At the ordinary time, an output of an oscillating circuit 1 is frequency-divided 2, and the time is displayed 4 through a driving circuit 3. In this case, a test state setting circuit 7 is in a reset state. In case of executing a test, a reset terminal RS is made H, a storing circuit 7a is released from a reset state, and a state of the storing circuit corresponding to a test item is set from an input termial CL, by which a test signal is generated from a test signal generating circuit 7b. |
