| 摘要 |
PROBLEM TO BE SOLVED: To actualize I/O0 channel switching by a data input/output circuit without modifying a communication program. SOLUTION: A switch circuit 3 is provided between UART 2, etc., and an interface circuit 5, etc. The switch circuit 3 composed of a multiplexer switches output paths from the UARTs 2 to the respective interface circuits 5 and input paths from the respective interface circuits 5 to the UARTs 2 according to data registered in a switching register 4. The switching data for switching the multiplexer are changed by the switching register 4 to easily switch the paths. |
