| 摘要 |
PURPOSE:To simply send a frame signal without losing reliability by providing a superimposing circuit superimposing a frame signal onto a clock, a circuit separating an original clock and a frame signal based on the clock signal from a sender side and a frame signal extracting circuit to a transmission/reception section. CONSTITUTION:A transmission data from a data transmission circuit 15 of a system device 12 is sent to a system device 13 in synchronism with the clock. The frame signal is superimposed by a frame signal superimposing circuit 14 to form a clock signal, which is sent to the device 13 via a clock signal line 4. A clock synchronized with the clock of the device 12 is recovered by a clock recovery circuit 16. A frame signal is extracted from the said clock signal in the same timing as the sender side. Then the data from the signal line 3 is received in synchronism with said clock. The clock recovered in the device 13 is used for the synchronizing clock of the device 13 and the synchronizing clock to send the data from the device 13. |
