If device I did not generate the interrupt it will propagate the acknowledge signal to device II. 如果设备Ⅰ不产生中断,则把应答信号传输到设备Ⅱ。
After the stop bit is received, the device will acknowledge the received byte by bringing the Data line low and generating one last clock pulse. 在收到停止位之后,设备将通过拉低数据线,生成最后一个时钟脉冲来应答收到的字节。