| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide an interface circuit compliant with IEE1394 wherein a malfunction is avoided at power outage, data dropping at isochronous transfer is prevented, and a state is notified to other nodes whether operation of LINK is stopped without cutting off a power supply to the LINK or when made into a low power consumption state. SOLUTION: There are provided a first register 42 in which a first power source information indicating capable of supplying a power source to other nodes is stored, and a second register 43 in which a second power source information indicating incapable of supplying a power source to other nodes is stored. By a selector 44, the first power source information or the second power source information is housed in a PHY register 52 according to a hardware suspend signal HSB outputted from a PC 21 at operation stop control of a LINK part 24, while the power source information housed in the PHY register 52 is transmitted to other nodes together with various information at operation state change of the LINK part 24.</p> |
