Fujitsu Corporation

Tomohiro Deguchi

Hiroyuki Miyazaki

Hiroyuki Yoshida

Minoru Wano

IEEE 1394 bus interface circuit X comprises a physical layer LSI connected to an IEEE 1394 bus a data capture circuit X connected to the physical layer LSI through signal lines to capture data on the signal lines for data analysis, and a coupler (a plug or a socket) to be coupled to a coupler (a socket or a plug) to which a physical layer LSI of an IEEE 1394 bus interface is attached in actual use. With engaging the couplers and to each other, data transmitted between nodes and are captured by the data capture circuit X and analyzed in an IEEE 1394 bus analysis apparatus In another IEEE 1394 bus interface circuit, a link power status signal provided to the physical layer circuit from the link layer circuit is fixedly set low, whereby the physical layer circuit is made to function as a repeater, and data received by the physical layer circuit are captured by the link layer circuit and analyzed in the IEEE 1394 bus analysis apparatus.

Growing community of inventors

Kanagawa, Japan

Tomohiro Deguchi