JPS6181242U - - Google Patents

Description

[Brief explanation of the drawing]

Fig. 1 is a diagram showing the connections between the control units on the sending side and the receiving side, Fig. 2 is a timing chart explaining data transfer, Fig. 3 is a flow chart showing the operation of the control unit on the sending side, and Fig. 4 is a timing chart illustrating the shortcomings of the prior art. 1... Sending side control section, 2... Receiving side control section, CL...
Synchronous signal line, SI...input signal line, SO...output signal line.

Claims (1)

[Scope of utility model registration request] The transmitting side and the receiving side are connected by a synchronizing signal line, an input signal line, and an output signal line, and the transmitting side has a synchronizing signal that alternately outputs first level and second level signals to the synchronizing signal line. an output device, a data output device that sequentially outputs data for each bit of transfer data to the output signal line in synchronization with a first level signal, and a data output device that outputs inverted data of the output data in synchronization with a second level signal. An inverted data output device for outputting to the output signal line and an echo back check device are provided,
The receiving side includes a data input device that inputs data of the output signal line when a first level signal is output to the synchronization signal line, and outputs the input data as echo back data to the input signal line. an echo back data output device that outputs the synchronization signal;
A data transfer device characterized in that it determines whether the signal levels of the output data and the echo back data match substantially in synchronization with switching from a level to a first level.