NBN EN 61030 : 1994

Committees responsible
National foreword
Specification
1. Scope and main features of the Domestic Digital
        Bus (D2B)
2. Normative references
3. Definitions and abbreviations
3.1 Definitions
3.2 Abbreviations
4. Modes
5. Main transmission features of D2B
5.1 Communication-related functions
5.2 Characteristics of transmitted signals
6. Frame structure
7. Frame exchange protocols
7.1 Frame sequences and acknowledgements
7.1.1 Write sequence
7.1.2 Read sequence
7.2 Description of the frame protocol
7.2.1 Start bit
7.2.2 Mode bits
7.2.3 Master address bits
7.2.4 Slave address bits
7.2.4.1 Slave address acknowledge
7.2.5 Control bits
7.2.5.1 Interpretation of the four control bits
7.2.5.2 Control acknowledge
7.2.6 Data field
7.2.6.1 Data bits
7.2.6.2 End of data bit
7.2.6.3 Data parity bit
7.2.6.4 Data acknowledge bit
7.2.7 Acknowledgement data
7.2.8 Activating the lock/unlock function
7.2.9 Medium access protocol
7.2.9.1 Physical characteristics
7.2.9.2 Carrier sense
7.2.9.3 Collision detection
8. Bit formats
8.1 General bit format
8.2 Detailed description of the bit formats
8.2.1 Introduction
8.2.2 Start bit (see figure 8)
8.2.3 Arbitration bits (see figure 9)
8.2.4 Master to Slave bits (see figure 10)
8.2.5 Slave to Master bits (see figure 11)
9. Address allocation
9.1 Address space definition
9.2 Allocation of AV/C address codes (Service code
        0001)
9.3 Sub-devices
10. Data interpretation
10.1 Slave status
10.2 Lock address
10.3 Property memory
10.4 Data
10.5 Commands
10.5.1 Principles of the command table
10.5.2 The service classification commands
10.5.3 Addressing of sub-devices
10.5.4 The "END" command
11. Gateway communication
11.1 Gateway communication in the Japanese home bus
        system (HBS) format
11.2 Gateway communication in the format specified
        with the OPR
11.3 Gateway addresses
12. Command extension
13. Multiple frame message format
14. Electrical specification of a D2B system
14.1 Typical circuit configuration (see figure 21)
14.2 Logical and electrical state relationship
14.3 Driver specification
14.4 Receiver specification
14.5 Cable specification
Annex
A. (normative) The command table
     Function commands - group
       Video commands
       Audio commands
       Deck/player commands
       Tuner commands
       Text function commands
     Function commands - specific
       Camera video commands
       Timer commands
Tables
1. D2B mode parameters
2. Mode bit allocation
3. Control code allocation
4. Allocation of type codes AV/C device or sub-device
     (Service code 0001)
5. Allocation of type codes for additional devices or
     sub-devices (Service code (0011)
6. Slave status bit allocation
7. Bit allocation for mid and least significant lock
     address nibbles
8. Bit allocation for most significant lock address
     nibble
9. Bit allocation for OPR associated with the OPC
     "Begin 2"
10. SA' and DA' definition
11. Bit allocation of the OPR association with the OPC
     "Begin 1"
12. Address allocation of gateways
Figures
1. Configuration
2. Structure of D2B frame
3. Flow chart showing frame exchange protocol
4. Sequence of frame bits during a Master to Slave
     transfer - Write action
5. Sequence of frame bits during a Slave to Master
     transfer - Read action
6. Frame format
7. Example of a D2B digital filter
8. Start bit
9. Arbitration bit
10. Master to Slave bit
11. Slave to Master bit
12. D2B Address Space
13. Typical D2B address for an AV/C device
14. Example of configuration with devices and sub-devices
15. Principles of the command table
16. Frame format of sub-device address
17. Format of SSDA and DSDA
18. D2B as sub system in a configuration with a Home
     Electronic Bus
19. Format of SA' and DA'
20. Frame format
21. Reference circuit
22. Driver delay times
23. Receiver delay times

Establishes the modes of transmission, the communication protocols, the addressing procedures, the command language and electrical characteristics for the Domestic Digital Bus System. Appropriate for audio and video, for controllers and for home computers. Can be used as a local independent system or as an integrated subsystem for any other application. The structure of the Domestic Digital Bus, the transmission speeds, the format and the structure of the frames have been chosen to meet the requirements of the home and small office application area.