Audio Network Interface Module

CobraNet CM-1
®
Digital Audio Network Interface Module
CobraNet® Technology Advantages
• Also 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
more than one million channels of
installed audio around the world.
• Networked audio, control and
monitoring (bi-directional).
• Uses SNMP for control and
monitoring (IT-friendly).
• Incorporates multiple
fault-tolerant features.
• Ability to send audio from any
CobraNet® interface to any
other – unlimited addressing,
unlimited capacity.
CobraNet® technology has established itself as the
• Studio Grade, Low-Jitter Clock Source.
market-leading solution of choice for networked audio.
• High Speed Parallel Host Port Interface –
The CobraNet® solution leverages the rapid
developments in the IT networking industry to provide
an increasingly cost-effective connectivity solution for
audio professionals worldwide. The CM-1 is a DSPbased solution that provides an interface in the form
of a compact, low-power module. Featuring 32
simultaneous channels, each with distributed digital
audio input and output, the CM-1 is designed to be
easily integrated into a wide variety of professional
Cirrus Logic, Inc.
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Austin, Texas 78746
United States
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learn more at
www.cirrus.com
audio products such as signal processors, mixers,
amplifiers and self-powered loudspeakers.
interfaces to an optional external control
processor.
• SNMP Agent – Standards-based Ethernet
control, monitoring and management.
• TFTP Support – firmware updates over
the network.
• Low Latency – selectable 1.33, 2.66 or 5.33 ms
across network.
• Optional Remote Power Through RJ-45
Connection – for powering via the Cat-5 Ethernet
connection. External circuitry required.
• Asynchronous Serial I/O Port – bridge
serial control data over Ethernet.
Features
• 100BASE-TX Ethernet Interface – 100 Mbps,
full-duplex Ethernet, fully compliant with
IEEE 802.3u standard.
• Secondary 100BASE-TX Ethernet Interface –
redundant network connection for fault tolerance.
• Quad Synchronous Serial Output Ports – capable
of supplying 32 total audio channels at 48 or 96
kHz sample rates.
• Quad Synchronous Serial Input Ports – capable of
receiving 32 total audio channels at 48 or 96 kHz
sample rates.
• Status LEDs – Link, Activity and CobraNet.®
conductor status for each Ethernet jack.
• Order CM-1 or CM-1-FWZ option – The CM-1
Ethernet connector includes an RJ-45 jack with
integrated transformer isolation. The CM-1-FWZ
option includes solder points to be wired to
external Ethernet connector.
Electrical Specifications
Power
Host Port
Description
Direction
Notes
Description
Notes
Host Data
In/Out
Host port data (x8)
VCC +3.3
System +3.3 V, +/-0.3 Volts, 1.2 A
Host Address
In
Host port address (x3)
VCC +5
System +5.0 V, +/-0.25 Volts, 0.1 A
Host Direction
In
Host port transfer direction
GND
System ground
Host Request
Out
Host port DMA request
Host Alert
Out
Host port interrupt request
Host Strobe
In
Host port select
Operating Temperature Range – 0 to 70 degrees Celsius ambient.
Asynchronous Serial
Description
Synchronous Serial (Audio ) Ports
Direction
Notes
Serial Receive Data
In
Serial data receive
Out
Serial data transmit
Out
RS485 multi-drop transmit enable
Description
Direction
Notes
Serial Transmit Data
Audio Bit Clock
Out
Synchronous serial bit clock
Transmit Drive Enable
Audio Output Data
Out
Output serial audio data (x4)
Audio Input Data
In
Input serial audio data (x4)
Sample Clock
Out
48 or 96 kHz sample clock
Description
Direction
Notes
Master Audio
Clock In
In
External 24.576 MHz clock input
for systems containing multiple
CobraNet® interfaces
Reset
In
System reset (active low)
Watch Dog
Out
Continuously toggles to indicate
proper operation
Master Audio
Clock Out
Out
Low jitter master 24.576 MHz
clock output
Interface Ready
Out
Reference Clock
In
Auxiliary reference sample clock
input for synchronizing network to an
external clock source
De-asserts during installation when
fault detected or connection to network
is lost
Cable Power
In/Out
Aux RJ-45 pins for Cat-5 powered
applications
CM-1 Ethernet Electrical Specifications
• Ethernet Primary Connector – RJ-45 jack. Standard Ethernet pinout.
Complies with IEEE 802.3u standard.
Miscellaneous
CM-1 (Top View)
• Ethernet Secondary Connector – RJ-45 jack with integrated transformer
isolation. Standard Ethernet pinout. Complies with IEEE 802.3u standard.
• Ethernet uses 2 of the 4 twisted wire pairs available on a Cat-5 cable.
The unused pairs are available at the module interface connector as
Cable Power for DC power (if supplied).
CM-1-FWZ Ethernet Electrical Specifications
• Ethernet Primary Connector – Solder points to be wired to external
Ethernet connector. Transformer isolated. In-use/conductor and
Link/Act/Fault LEDs supported. Complies with IEEE 802.3u standard.
• Ethernet Secondary Connector – Solder points to be wired to external
Ethernet connector. Transformer isolated. In-use/conductor and
Link/Act/Fault LEDs supported. Complies with IEEE 802.3u Standard.
• Ethernet uses 2 of the 4 twisted wire pairs available on a Cat-5 cable.
Connection points are provided for all 8 conductors on each port.
The unused pairs are available at the module interface connector as
Cable Power for DC power (if supplied).
©2009 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, Cirrus, the Cirrus Logic logo design and
CobraNet are trademarks of Cirrus Logic, Inc. Other brand and product names may be trademarks or service marks of their respective owners.
Product Bulletin 0087-0609-PB