Data transmission selection circuit and method

摘要

A data transmission selection circuit and method select one of data transmission lines between a mother system and daughter systems and transmit data via the selected transmission line. The circuit includes an inputting module, an outputting module, a switching unit, and a processing unit. The inputting module receives and sends the data. to the switching unit and the outputting module. The processing unit receives a previous switching status data (indicating that one of the data transmission lines and one of the daughter systems are connected and) created by a previous data transmission selection circuit. After analyzing the previous switching status data with an algorithm, the processing unit determines a switching status data. different from the previous switching status data, such that the switching unit connects another one of the data transmission lines and another one of the daughter systems according to the switching status data.

主权项

1. A data transmission selection circuit for selecting one of a plurality of data transmission lines between a mother system and a daughter system and transmitting data by the selected transmission line, the data transmission selection circuit comprising:
an inputting module having a plurality of first input ports, a first detection port, and a first data port, the first input ports connecting to the data transmission lines, the first detection port receiving a previous switching status data, and the first data port receiving a trigger signal; an outputting module having a plurality of first output ports, a second detection port, and a second data port, the first output ports connecting to the first input ports, respectively, and the second data port connecting to the first data port; a switching unit having a plurality of second input ports, a second output port, and a selection port, wherein a plurality of paths are created between the second input ports and the second output port, the second input ports connecting to the first input ports, respectively, and the switching unit selecting one of the paths based on a switching signal received by the selection port; and a processing unit having a receiving terminal, a data terminal, a control terminal, and an output terminal, the receiving terminal connecting to the first detection port, the data terminal connecting to the first data port, the control terminal connecting to the selection port, and the output terminal connecting to the second detection port, wherein, after the data terminal has received the trigger signal, the processing unit analyzes the previous switching status data at the receiving terminal with an algorithm, so as to determine a switching status data different from the previous switching status data, wherein the processing unit generates the switching signal based on the switching status data and sends the switching signal to the control terminal, wherein the processing unit sends the switching status data to the output terminal, wherein the previous switching status data is indicative of a state required for a previous data transmission selection circuit or the mother system to select one of the paths, wherein the switching status data is indicative of a state required for a next data transmission selection circuit to identify another said path selected by the switching unit.