二是提供READY信号管脚，由外部电路控制可以产生任意数目的等待周期。

Another is to provide the READY signal pin, it can produce arbitrarily number of wait period with the exterior control circuit.

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将数字管脚初始化为输出信号。

Initialize the digital pin as an output.

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事务级建模在RTL级之上，忽略了不必要的细节，把模块之间的通信方式从管脚和信号方式抽象为函数调用。

Transaction level modeling hides unnecessary details. The communication at transaction level is method calls in comparison with signals and pins at RTL.

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