Communication system for providing digital data transfer, electronic equipment for transferring data using the communication system, and an interface control device

• US 6,138,196 A
• Filed: 10/07/1999
• Issued: 10/24/2000
• Est. Priority Date: 08/27/1996
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Takayama, Nobutoshi, Itou, Masamichi
• Primary Examiner(s): Ray, Gopal C.
• Application Number:
  US09/414,319
• Time in Patent Office: 383 Days
• Field of Search: 710/105, 710/104, 710/106, 710/11, 710/62, 710/101, 710/129, 709/238, 709/253, 370/463, 370/912, 379/88.13
• US Class Current: 710/105
• CPC Class Codes: H04L 12/40117 Interconnection of audio or video/imaging devices home automation networks H04L12/2803; bitstream network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04N 21/4108 characterised by an identification number or address, e.g. local network address protecting specific internal or external computer components using identification number G06F21/73; network arrangements, protocols or services for addressing or naming H04L61/00
• CPC Class Codes: H04N 21/4223 Cameras H04N23/00 takes precedence
• CPC Class Codes: H04N 21/43615 Interfacing a Home Network, e.g. for connecting the client to a plurality of peripherals home Audio Video Interoperability [HAVI] data switching networks H04L12/2805
• CPC Class Codes: H04N 21/43632 involving a wired protocol, e.g. IEEE 1394 high-speed IEEE 1394 serial bus H04L12/40052

Abstract

An electronic equipment for communications with other nodes via a serial bus interface. The electronic equipment has a plurality of functions, and stores a plurality piece of information representative of the plurality of functions. The communication system selectively reads the stored information and realizes the function corresponding to the read information. Accordingly, communications suitable for each function can be executed via the serial bus interface. An interface control device used with an electronic equipment having a plurality of functions stores a plurality piece of information representative of the plurality of functions. The communication system selectively reads the stored information and realizes the function corresponding to the read information. Accordingly, the electronic equipment can perform communications suitable for each function.

Claims

1. A device for controlling a serial bus interface interconnecting a plurality of nodes, comprising:

storage means for storing a plurality of pieces of information representative of a plurality of functions provided by one of the plurality of nodes;

selecting means for selecting one piece of the plurality of pieces of function information stored in said storage means; and

control means capable of outputting to the serial bus interface one piece of the plurality of pieces of function information selected by said selecting means,

wherein a management condition of a serial bus is reset in response to that one piece of the plurality piece of function information selected by said selecting means is changed.

2. A device according to claim 1, wherein the plurality of pieces of function information are assigned different addresses, and said selecting means selects one of the different addresses.

3. A device according to claim 1, wherein said storage means further stores a plurality of pieces of protocol information representative of a plurality of subsidiary communication protocols corresponding to the plurality of different functions, and said control means can selectively execute the plurality of subsidiary communication protocols in addition to a fundamental communication protocol specific to the serial bus interface.

4. A device according to claim 3, wherein said selecting means further selects one piece of the plurality of pieces of protocol information, and said control means can output the protocol information selected by said selecting means to the serial bus interface.

5. A device according to claim 1, wherein the serial bus is used with the serial bus interface, and is in conformity with IEEE 1394 standards.

6. An electronic equipment connected to a serial bus interface, interconnecting a plurality of electronic equipment, comprising:

interface control means capable of executing a plurality of subsidiary communication protocols in addition to a fundamental communication protocol;

switching means for selectively executing the plurality of subsidiary communication protocols; and

selecting means for reading from another electronic equipment one piece of a plurality of pieces of protocol information representative of the plurality of subsidiary communication protocols,

wherein a management condition of a serial bus is reset in response to that one of the plurality of subsidiary communication protocols executed by said switching means is changed.

7. An electronic equipment according to claim 6, wherein the plurality of pieces or protocol information are assigned different addresses, and said selecting means selects one of the different addresses.

8. An electronic equipment according to claim 6, wherein the serial bus is used with the serial bus interface, and is in conformity with IEEE 1394 standards.

9. A device controlling a serial bus interface interconnecting a plurality of nodes, comprising:

control means capable of executing a plurality of subsidiary communication protocols in addition to a fundamental communication protocol;

switching means for selectively executing the plurality of subsidiary communication protocols; and

selecting means for selectively reading from one of the plurality of nodes one piece of a plurality of pieces of protocol information representative of the plurality of subsidiary communication protocols,

wherein a management condition of a serial bus is reset in that one of the plurality of subsidiary communication protocols executed by said switching means is changed.

10. A device according to claim 9, wherein the plurality of pieces of protocol information are assigned different addresses, and said selecting means selects one of the different addresses.

11. A device according to claim 9, wherein the serial bus is used with the serial bus interface, and is in conformity with IEEE 1394 standards.