| 摘要 |
PURPOSE:To establish the communication control unit including the data comparison circuit and detection gate circuit less in the amount of circuits and high in the efficinecy of usage, by providing the selection circuit to the data and detection control signal. CONSTITUTION:The control signal generating circuit 1 is responded to the clock signal 101 to produce the signal 111 selecting transmission and reception and the timing signal 112, and the transmission control code detected is set to the registers 7 and 8. The data selection circuit 2 selects either one of the reception data 102 or transmission data 103 and feeds the signal 113 to the comparison circuit 3. The circuit 3 compares the pattern of all the transmission control code with the signal 113, and when it is in agreement with any pattern, the signal 114 is fed to the detection control gate circuit 5. The detection control and selection circuit 4 selects either of the output of the reception detection control register or transmission detection control register 9 or 10 and feeds it to the circuit 5. The circuit 5 feeds the signal in agreement with the bit correspondence of the circuits 3 and 4 to the coding circuit 6, and the coding signal 119 is output via the registers 7 and 8. |
