| 摘要 |
PROBLEM TO BE SOLVED: To provide an IEEE1394 interface device capable of visually realizing the connecting state of an IEEE1394 interface reference device, and quickly confirming the defective state of the device. SOLUTION: In this IEEE1394 interface device for transmitting and receiving data signals being a pair of differential signals on which a prescribed bias voltage is superimposed and a strobe signals being a pair of differential signals, prescribed display such as the lighting is operated at a display part such as an LED by the bias voltage to be supplied when the transfer line of the data signals is connected to a terminal side to which the transfer line of the data signals is connected.
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