To reduce EMI, a frequency synchronization pin allows multiple ICs from the family to self-synchronize or to synchronize to an external clock.
为了减少EMI,一个频率同步的引脚允许此系列的多重IC实现自同步或与外部时钟同步。
At first blush, you might think that you could simply cascade two counters together using the carry-out pin, Pin 12, from one counter to feed the clock-input pin, Pin 14, of a second counter.
初看上去,也许会考虑使用动作管脚(管脚12)从一个计数器接到第二个计数器的时钟输入管脚(管脚14),简单的级联两个计数器。
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