| 摘要 |
<p>PURPOSE:To output either signal of two systems in a condition synchronizing with a clock signal by sampling and outputting the signal which is not synchronized with the clock signal by the clock signal from a counter with load function. CONSTITUTION:The system switches an action mode in a counter with load function 3 to a count mode or to a load mode according to the condition of a load signal. That is, when the counter 3 is set in the count mode, a count output is obtained as a selecting output signal from the counter 3 as it is with counting a clock signal (a). However, when it is set in the load mode, a signal (b) from an external part is loaded into the counter 3 synchronizing with the clock signal (a), the signal from the external part is sampled by the clock signal (a) with the counter 3 and a sampling output can be obtained as the selecting output signal. Thus, either one can be outputted from the signals of two system selectively in the condition synchronizing with the clock signal (a).</p> |
