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2. 发明授权

US5293495A Method of addressing devices and transferring data on a bus 失效
标题翻译：在总线上寻址设备和传输数据的方法
公开(公告)号：US5293495A
公开(公告)日：1994-03-08
申请号：US907756
申请日：1992-06-29
申请人： Uoc H. Nguyen , George L. Eldridge , Otto Sperber
发明人： Uoc H. Nguyen , George L. Eldridge , Otto Sperber
IPC分类号： G06F13/16 , G06F13/362 , G06F13/38
CPC分类号： G06F13/362
摘要： A method is described for transferring data on a digital data bus system. The bus system includes a bus having a clock line for communicating a clock signal, address lines for communicating address signals, data lines for communicating data signals, and control lines for communicating control signals. A bus controller is connected to the bus. A plurality of devices are also connected to the bus. Each device has a predetermined address. The control lines include a bus grant line for communicating a bus grant signal that permits the devices addressed by the bus controller to send or receive data signals. According to the method, the bus controller generates a bus grant signal on the bus grant line and source address and destination address signals on the address lines. The devices receive the bus grant signal and the source address and destination address signals. The devices decode the source address and destination address signals in response to the bus grant signal. The device having the predetermined address corresponding to the decoded source address signal transfers the data signals along the data lines, in response to the bus grant signal and the decoded source address signal. Finally, the device having the predetermined address corresponding to the decoded destination address signal receives the data signals sent by the addressed source device, in response to the bus grant signal and the decoded destination address signal.
摘要翻译：描述了用于在数字数据总线系统上传送数据的方法。总线系统包括具有用于传送时钟信号的时钟线，用于传送地址信号的地址线，用于通信数据信号的数据线以及用于传送控制信号的控制线的总线。总线控制器连接到总线。多个设备也连接到总线。每个设备都有一个预定的地址。控制线包括用于传送允许总线控制器寻址的设备发送或接收数据信号的总线许可信号的总线授权线。根据该方法，总线控制器在总线授权线上生成总线授权信号，并在地址线上产生源地址和目的地地址信号。设备接收总线授权信号和源地址和目标地址信号。该设备响应于总线授权信号解码源地址和目的地地址信号。响应于总线许可信号和解码的源地址信号，具有与解码的源地址信号相对应的预定地址的设备沿着数据线传送数据信号。最后，具有对应于解码的目的地地址信号的预定地址的设备响应于总线许可信号和解码的目的地地址信号，接收由寻址的源设备发送的数据信号。

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