Conan

Conan® OCC8001

The CONAN® OCC8001 is an advanced CMOS device optimized for use in D2B ring topology networks using either optical or electrical transmission media. The device integrates the functions of source data routing and communication protocol management.

Fully compliant with D2B Mode0 Protocol
4.2336Mbps source data rate (equivalent to 3 x 16bit stereo audio channels)
Integration of source and control data
Multiple source data channels
SPDIF audio port
I2C and SPI compatible control port
Flexible source data routing
Implements all low-level communication tasks:
Easy hardware and software implementation

THE D2B PROTOCOL

The Digital Data Bus (D2B) is a networking protocol for automotive multimedia data communication integrating digital audio, video and other high data rate synchronous or asynchronous signals, with the control data for network management protocols and APIs. The protocol enables robust single cable interconnection and compatible interoperation of in-car AV multimedia and ITS devices.

CONTROL PORT

Local microcontroller control of the device is handled via the control port, which can be configured as either an I2C or SPI compliant interface.

NETWORK INTERFACE

Data is organized in frames which are transmitted at the system sampling frequency. Frames contain source and control information and are further divided into sub-frames of 8 bytes fields. At the physical level, data is transferred as serial bits with bi-phase encoding. Control data is constructed into a control frame, which is transferred at a rate of two bits per sub-frame. The control frame comprises 128 bits and requires a block of 48 frames to transmit.

SOURCE DATA PORTS

Six source data ports are provided, giving the flexibility for multiple data sources and destinations to be handled by a single CONAN®. Data can be arranged as Philips I2S, Sony or Matsushita (16 or 24 bit) and SPDIF (SR0, SX0 only serial data formats. All data ports share a common frame synchronization and serial bit clock. The Routing Information Table allows all data bytes coming from either the network receiver or source input ports to be re-arranged, mixed and re-directed to the network transmitter or source output.