每当计数器被时钟脉冲触发一次时，计数器输出的二进制数便累减1。
The counter output, which represents a binary number, decreases by 1 any time the counter is triggered by a pulse .
数据选择器则将两个计数器中处于保持状态的奇偶数据交替输出，实现双边沿触发加法计数器的功能。
Data selector alternately to realize the functions of double edge trigger addition counter output the odd and even data in two counters.
数据选择器则将两个计数器中处于保持状态的奇偶数据交替输出，实现双边沿触发加法计数器的功能。
Data selector alternately to realize the functions of double edge trigger addition counter output the odd and even data in two counters.
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