144-pin LQFP
22 mm
22 mm
IC dimensions
(pin-to-pin nominal)
New Audio System Processors are Ideal for Digital Audio Networking Applications
Highly Integrated Family Combines CobraNet Interface with Powerful Audio DSP Engine to
Dramatically Reduce Overall Audio System Costs
The new CS4961xx family of ICs integrates
Cirrus Logic’s highly regarded audio digital
signal processor (DSP) with Cirrus Logic’s
award-winning CobraNet™ technology, which
is the leading standard for delivering real-time,
uncompressed digital audio over Ethernet
networks. The results are highly optimized
audio system processors that offer dramatic
system cost savings and enhanced audio
processing features for manufacturers of
professional, commercial and consumer
networked-audio products.
CS496122, reduce system costs because they
allow for the removal of a separate, dedicated
audio DSP on the board design. This 32-bit
fixed-point DSP core features 120 MIPS for
custom programming and these three ICs
provide 2, 8 or 16 simultaneous channels of
audio input and output at up to 96 kHz sample
rates. They also provide multiple 16, 20 or
24-bit audio connections across an Ethernet
network. In fact, two-way audio control and
monitoring is possible at any point along
the network.
The CS4961xx audio system processors, which
include the CS496102, the CS496112 and the
Featuring a high-speed parallel host port
interface, the CS4961xx allows optional
The ICs are designed to expand the market
for CobraNet-enabled networked digital audio
products such as power amplifiers, mixers,
signal processors, intercom systems, ceiling
speakers, loudspeakers, paging systems, and
high-end networked consumer audio gear.
CS4961xx Features
Software Development Kit
CobraNet Technology Advantages
• Combines CobraNet technology with
a powerful 32-bit DSP core
• Integration reduces overall system costs
• Simplifies overall system design effort
• 2x2, 8x8, 16x16 channel ICs
• Supports 48 kHz and up to 96 kHz
sample rates
• Selectable latency of 1.33, 2.66, or
5.33 ms across network
• 32-bit synchronous serial digital audio I/O
• Parallel host control
• Asynchronous serial control transport
• Available in 144-pin LQFP
• 120 MIPS DSP on programmable core
• Audio may be processed from network
or local inputs and sent to local outputs
or to the network
• Full-featured DSP assembler and linker
• Includes Cirrus Logic’s DSP Conductor™
software, a graphical audio-oriented
development environment, for easy
adjustments to DSP Parameters
• Integrated target management and
code download
• Real-time control of DSP parameters
over the audio network
• Example DSP code and tutorials
• Microkernel handles all audio I/O and
DSP parameter control
• Available as low-cost ICs without licensing
or royalty fees
• CobraNet technology can coexist with data
traffic over existing Ethernet networks,
saving money by eliminating additional
infrastructure costs
• De-facto industry standard with tens-ofthousands of installed nodes in high-profile
“mission-critical” venues worldwide
• Networked audio, control and monitoring
• Uses SNMP for control and monitoring
(computer-network friendly)
• Incorporates multiple fault-tolerant features
• Ability to send audio from any CobraNet
interface to any other – unlimited addressing,
unlimited capacity
connection to a host processor as well as
offering Ethernet-based control, monitoring,
and management via industry standard SNMP.
Firmware can be easily updated over Ethernet
using TFTP or via the host interface. Additional
control and monitoring functions are also provided by the innovative, built-in asynchronous
and packet-bridge functions.
Software Tools – DSP Programming
Software Tools – Networking
• Assembler and Linker – Full featured
assembler and linker supports modular
development for Cirrus Logic’s high
performance Harvard-architecture
DSP processor.
The Silicon Series of processors, along with
the included firmware, implements a fully
functional CobraNet technology-compliant
interface. In addition, Cirrus Logic offers a
variety of utility programs and documentation
support to assist our developers in successfully
creating and launching CobraNet technology
based products.
• Using Cirrus Logic’s DSP Conductor™
software, a graphical audio-oriented
development environment, the developer
defines signal flow and may make real-time
adjustments to DSP parameters. Software
interacts with the target system via an
Ethernet connection.
• Documentation – The SDK includes
comprehensive documentation of the
Instruction Set Architecture (ISA) and the
operation of the Assembler, Linker and DSP
Conductor software. Example code and
tutorials get you started quickly writing your
own application specific DSP code.
• Support – The CobraNet technology SDK is
supported by experienced audio DSP and
CobraNet technology engineers as well as
Cirrus Logic FAEs.
• CobraCAD – is an application used to
model CobraNet network topologies. Simply
point, click, drag, and drop and CobraCad
will verify that the CobraNet network
configuration will perform as intended.
This tool is ideal for end users installing
systems with CobraNet technology.
• CobraNet Discovery – is a utility program
used to provide valuable feedback regarding
the working state of a CobraNet network.
The program reads and displays operational
statistics from every CobraNet interface on
the network. It can also be used to assign
addresses to individual CobraNet devices
and to update CobraNet firmware.
• CobraNet Object Tools (COT) – is a
Microsoft ® COM object library that can be
used with a variety of software languages
or scripting systems. COT provides all of the
low-level functionality needed to configure
and monitor CobraNet devices, greatly
easing the development effort required to
write custom CobraNet applications.
• Other Resources – Cirrus Logic has
additional software tools available for use
in manufacturing and test environments.
Reference designs and many helpful
application notes are also available.
The CobraNet Silicon Series processors and
its firmware and software tools are available
today with the full support that comes from the
worldwide Cirrus Logic sales and applications
engineering teams.
CobraNet technology has a proven track
record, with years of successful deployments
and tens-of-thousands of nodes in use today.
This solid track record, along with the costeffective CobraNet Silicon Series of processors
now available, makes the selection of
CobraNet technology an easier choice
than ever.
Application Examples
Facility audio distribution
Paging stations
Power amplifiers
Audio snakes
Signal processors
Mixing consoles
Self-powered loudspeakers
Ceiling speakers
Microphone pre-amplifiers
Media servers
Stand-alone A/D and D/A interfaces
Networked consumer audio
Part No.
Serial Audio In
Serial Audio Out
* These ICs can be made available in lead-free packaging and/or industrial grade.
C i r r u s L o g i c , I n c . · 2 9 0 1 V i a F o r t u n a · A u s t i n T X 7 8 74 6 U S A · T 5 1 2 - 8 5 1 - 4 0 0 0 · T 8 0 0 - 8 8 8 - 5 0 1 6 · F 5 1 2 - 8 5 1 - 4 9 7 7
Product Bulletin 0159-0205-PB-LP © 2005 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, CobraNet, and Leading
the Digital Entertainment Revolution are trademarks of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.