当键盘或者鼠标想发送数据时，它首先必须检查时钟线，确认它处于高电平。
When the keyboard or mouse wants to send information, it first checks the Clock line to make sure it's at a high logic level.
辅助设备(指键盘)检查时钟线，如果时低电平，禁止发送数据。
The auxiliary device checks the 'clock' line. If the line is inactive, output from the device is not allowed.
如果不是，主机禁止通信，设备必须缓冲任何要发送的数据，直到主机释放时钟。
If it's not, the host is inhibiting communication and the device must buffer any to-be-sent data until the host releases Clock.
数据传输FIFO的，地点为发送时钟使用的传输速率地址指针在发送时钟速度递增。
Data is transmitted out of the FIFO at a transmit clock rate using a transmit address pointer incremented at the transmit clock rate.
从设备发送给主机的数据时在时钟信号的下降沿读取的；
Data sent from the device to the host is read on the falling edge of the clock signal;
在发送端时钟频率随时间变化的情况下，以较低的成本和较简单的电路实现，保证了接收端采样数据及音频数据恢复的准确性。
Because clocking frequency of sending terminal is changed with times at lower cost and simple circuit, accuracy of receiving end sampled data and audio - data recovery is assured.
它提供一个数据时钟输出(DCO)用于在输出端捕获数据，以及一个帧时钟输出(FCO)用于发送新输出字节信号。
A data clock output (DCO) for capturing data on the output and a frame clock output (FCO) for signaling a new output byte are provided.
它提供一个数据时钟输出(DCO)用于在输出端捕获数据，以及一个帧时钟输出(FCO)用于发送新输出字节信号。
A data clock output (DCO) for capturing data on the output and a frame clock output (FCO) for signaling a new output byte are provided.
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