| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a bus system where bus systems for a plurality of protocols exist together and a wiring amount of a bus is reduced, and bus switch devices used in the same. <P>SOLUTION: The bus system includes: a first bus system; a second bus system; a common bus line for connection between first and second partial bus lines of a first bus line or between third and fourth partial bus lines of a second bus line; a first bus switch device provided between the first partial bus line and the common bus line and between the third partial bus line and the common bus line; and a second bus switch device provided between the second partial bus line and the common bus line and between the fourth partial bus line and the common bus line. The bus switch devices monitor voltage states of the partial bus lines respectively and, when detecting the voltage state where any message is not transmitted, switch to a second connection state for the connection between the third and fourth partial bus lines and the common bus line. <P>COPYRIGHT: (C)2012,JPO&INPIT |
