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    • 2. 发明申请
    • SERIAL DATA TRANSMISSION METHOD AND SERIAL DATA TRANSMISSION APPARATUS
    • 串行数据传输方法和串行数据传输装置
    • US20080114877A1
    • 2008-05-15
    • US11938382
    • 2007-11-12
    • Yoichiro MORIYasuhiro UNOYukinobu HAMAJIMA
    • Yoichiro MORIYasuhiro UNOYukinobu HAMAJIMA
    • G06F15/16
    • H04L12/4035
    • Data transmission and reception is effected via a data transmission line between a master device, which is capable of controlling data transfer, and a slave device in synchronism with a clock signal transmitted from the master device to the slave device via a clock transmission line. A signal indicative of the presence or absence of changes in the state of the slave device is sent to a third line connecting the master device to the slave device. The master device effects transmission for the purpose of acquiring data concerning state changes on the slave device side when the signal of the third line indicates that a state change has taken place on the slave device side. The transmission load can be reduced by effecting transmission used by the master device to check data representing the state of the slave device only when necessary.
    • 数据发送和接收通过能够控制数据传送的主设备与从主设备经由时钟传输线从主设备发送到时钟信号的时钟信号同步的数据传输线进行。 指示从属设备的状态是否存在的信号被发送到将主设备连接到从设备的第三线路。 当第三行的信号指示在从设备侧发生状态改变时,主设备实现用于获取关于从设备侧的状态变化的数据的传输。 只有在必要时,才能通过实现主设备所使用的传输来检查表示从设备状态的数据来减少传输负载。