Cirrus Logic CS1810xx - Manual (Page 5)

CobraNet Hardware User’s Manual
Introduction
DS651UM23
©
Copyright 2005 Cirrus Logic, Inc. 5
Version 2.3
1.0 Introduction
This document is intended to help hardware designers integrate the CobraNet TM interface
into an audio system design. It covers the CS18100x, CS18101x, CS18102x, CS49610x,
CS49611x, and CS49612x members of the CobraNet
TM 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
Ethernet Ethernet
Control Data
Isochronous Data
(Audio)
Unregulated
Traffic
Clock