CS18102X datasheet(5/54 Pages) CIRRUS

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CobraNet Hardware User’s Manual

Introduction

DS651UM23

Version 2.3

1.0 Introduction

This document is intended to help hardware designers integrate the CobraNetTM interface

into an audio system design. It covers the CS18100x, CS18101x, CS18102x, CS49610x,

CS49611x, and CS49612x members of the CobraNetTM Silicon Series of devices, where

“x” is the ROM version (ROM ID). This document also describes the CM-2 module with

schematics, mechanical drawings, etc.

CobraNet is a combination of hardware (the CobraNet interface), network protocol, and

firmware. CobraNet operates on a switched Ethernet network and provides the following

additional communications services.

• Isochronous (Audio) Data Transport

• Sample Clock Distribution

• Control and Monitoring Data Transport

The CobraNet interface performs synchronous-to-isochronous and isochronous-to-

synchronous conversions as well as the data formatting required for transporting real-time

digital audio over the network.

The CobraNet interface has provisions for carrying and utilizing control and monitoring

data such as

Simple Network Management Protocol (SNMP) through the same network

connection as the audio. Standard data transport capabilities of Ethernet are shown here

as unregulated traffic. Since CobraNet is Ethernet based, in most cases, data

communications and CobraNet applications can coexist on the same physical network.

Figure 1 illustrates the different data services available through the CobraNet system.

Figure 1. CobraNet Data Services

Isochronous Data

(Audio)

Control Data

Clock

Unregulated

Traffic