| 摘要 |
PURPOSE:To increase the transfer speed of a data signal by constituting the titled system so that a receiving-side device executes read of receiving data, when a rise of ready signal sent from a transmitting-side video has been detected, and also a completion signal is sent out to the transmitting side device, as soon as the read is completed. CONSTITUTION:A digital output part 3 sends out a ready signal together with a bit parallel data signal. An interrupting part 5 of a receiving side executes an interruption program of an MPU 2 by detecting a rise of this ready signal. As a result, a digital input part 4 executes exactly read of the bit parallel data signal, and sends a completion signal to an MPU interrupting part 7 of a transmitting side from a digital output part 6, as soon as its execution is completed. The interruption part 7 of the transmitting side executes an interruption to an MPU 1 immediately when the completion signal is detected, and the next data transfer program can be executed.
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