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    • 4. 发明授权
    • System for recognizing of a device connection state by reading structure information data which produced by pull-up resistor and pull-down resistor
    • 通过读取由上拉电阻和下拉电阻产生的结构信息数据来识别器件连接状态的系统
    • US06658497B1
    • 2003-12-02
    • US09376482
    • 1999-08-18
    • Yusuke KawasakiShigeru HashimotoKoken Yamamoto
    • Yusuke KawasakiShigeru HashimotoKoken Yamamoto
    • G06F300
    • G06F13/4068
    • The present invention relates to a device connection state recognizing method capable of recognizing a connection state of devices without addition of signal lines dedicated to detection. Thus, in the method according to this invention, a portion of or all of a plurality of data signal lines are connected through pull-up resistors to a high electric potential or connected through pull-down resistors to a low electric potential in accordance with the connection state of the devices, and a processing unit reads, as structure information data, a high electric potential state/low electric potential state generated by the pull-up resistor/pull-down resistor in the portion of or all the plurality of data signal lines to recognize the connection state of the devices on the basis of the read structure information data. This invention is applicable to a various types of processing units which are to be connected through a common data bus to a plurality of devices.
    • 本发明涉及能够识别设备的连接状态而不添加专用于检测的信号线的设备连接状态识别方法。 因此,在根据本发明的方法中,多个数据信号线的一部分或全部通过上拉电阻器连接到高电位或通过下拉电阻器连接到低电位,根据 设备的连接状态,并且处理单元读取作为结构信息数据的多个数据信号的部分或全部由上拉电阻器/下拉电阻器产生的高电位状态/低电位状态 根据读结构信息数据识别设备的连接状态。 本发明可应用于通过公共数据总线连接到多个设备的各种类型的处理单元。