| 摘要 |
PURPOSE:To change a counted value of a counter by changing the status of an output terminal group of a register properly. CONSTITUTION:Respective one-sided input terminals of plural two input exclusive OR circuits 3 are connected to plural output terminals Q0-Qn of a counted value optional setting register and input terminals of a counter 2 are connected to the other input terminals of the circuits 3. The status of the pulral output terminals Q0-Qn are changed by setting up an optional set value to be counted previously in the register 1. Under the status of these output terminals, the counter 2 counts up the counted values successively, and when the status of these output terminals coincide with each other and all the two-input exclusive OR circuits 3 generate outputs, a clear signal is sent to the counter 2 through a gate circuit 4. |
