| 摘要 |
PROBLEM TO BE SOLVED: To properly use and perform a plurality of kinds of data communication and their responses in different ways with a simple configuration. SOLUTION: Between a master 11 and a plurality of slaves 12, 13,..., a common data bus 21, a control bus 22 whose control direction is from the master 11 to the slaves 12, 13,..., and a control bus 23 whose control direction is from the slaves 12, 13,..., to the master 11 are provided. Combinations of and changes in signal levels of the control buses 22, 23 permit shifts among various states to thereby perform data communication, a plurality of frame communication, interruption communication between the master and the slaves, and inter-slave communication. COPYRIGHT: (C)2004,JPO
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