| 摘要 |
PURPOSE: An apparatus for controlling interface between multiple WTIBs(Wireless Terminal Interface Circuit Board) is provided to increase the number of WTIB boards by setting a master card by discriminating a master and a slave. CONSTITUTION: When an interface unit(310) of a specific WTIB operates in master mode, an interface unit(320) of a different WTIB is operated in a slave mode. A transmission line(W_TX) of the interface unit(310) operating in the master mode is connected to a reception line(W_Rx) of the interface unit(320), while a transmission line(W_Tx) of the interface unit(320) operating in the slave mode is connected to a reception line(W_Rx) of the interface unit(310). When the master mode and the slave mode are determined, a central processing unit of the WTIB set in the master mode transmits a master clock to a central processing unit of the WTIB operating in the slave mode, thereby synchronizing the WTIBs.
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