公开(公告)号：US5452308A

公开(公告)日：1995-09-19

申请号：US43487

申请日：1993-04-06

申请人： Detlef Kaminski ,  Thilo Kuhner ,  Wolfgang Kremer ,  Bernd Haussler ,  Max Reeb ,  Rolf Adomat ,  Michael Brodersen ,  Alexander Dorr ,  Herbert Fiessinger

发明人： Detlef Kaminski ,  Thilo Kuhner ,  Wolfgang Kremer ,  Bernd Haussler ,  Max Reeb ,  Rolf Adomat ,  Michael Brodersen ,  Alexander Dorr ,  Herbert Fiessinger

IPC分类号： H04L12/24 ,  H04L12/26 ,  G06F11/00

CPC分类号： H04L43/00 ,  H04L12/2602 ,  H04L12/2697 ,  H04L41/06 ,  H04L43/50

摘要： A method for monitoring symmetrical two-wire bus lines and two-wire bus interfaces and a device for carrying out the method provides pulse weighting of low to high transitions or high to low transitions of the two wires operated in phase opposition of a two-wire bus line. The pulse chains thus obtained are used for step sequencing. In each case, one multistep shift function which is assigned to the first bus wire, is supplied with a first, constant logic read in state and can be reset to a second logic state in all-step fashion and, for all-step resetting of a similar second multistep shift function assigned to the second bus while, and vice versa, the step last achieved for each multistep shift function characterizing the respective fault state of the other bus wire. The pulse weighting is achieved by differentiation or high-pass filtering or by pulse generation controlled by state transition. For the pulse weighting, the device uses simple RC elements or edge-controlled monostable times, and for the multistep shift functions, two similar shift registers are used which can be loaded serially and clocked and reset in parallel and which can also be realized in one piece as a component of a monolithic semiconductor circuit by the previously mentioned elements. The device has a fault tolerance which can be programmed with respect to the bit width, and in conjunction with a likewise settable input cutoff frequency permits the decentralized local testing of two wire bus-type networks. The device can be made using CMOS technology, in conjunction with a very low space requirement.

摘要翻译： 用于监测对称的双线总线和两线总线接口的方法以及用于执行该方法的装置提供脉冲加权，该两个线路与两线相反地操作的两根线的低至高转变或高到低转变 公车线。 由此获得的脉冲串用于步骤测序。 在每种情况下，分配给第一总线的一个多步移位功能被提供有第一恒定逻辑读入状态，并且可以以全部步骤的方式复位到第二逻辑状态，并且对于全步重置 分配给第二总线的类似的第二多步移位功能，反之亦然，对于表征另一母线的相应故障状态的每个多步移位功能，最后获得的步骤。 通过微分或高通滤波或通过状态转换控制的脉冲发生实现脉冲加权。 对于脉冲加权，器件使用简单的RC元件或边沿控制的单稳态时间，对于多步移位函数，使用两个类似的移位寄存器，可以串行和时钟加载并且并行复位，也可以在一个 作为单片半导体电路的组件，由前述元件构成。 该器件具有可以相对于位宽度编程的容错，并且结合同样可设置的输入截止频率允许两个有线总线型网络的分散式本地测试。 该器件可以使用CMOS技术制造，结合非常低的空间要求。