CM-2 CM-2 CobraNet™ CM-2 Digital Audio Network Interface Module Compact, Low-Power Design Provides 8 Simultaneous I/O Channels CM-2 CobraNet, the industry-leading digital effective connectivity solution for audio 8 or 16 simultaneous channels of digital audio networking technology from Cirrus professionals worldwide. audio input and output, the CM-2 is designed Logic , has established itself as the to be easily integrated into a wide variety of ® product of choice for networked audio. The CM-2 is based on the highly integrated audio products such as signal processors, The CobraNet solution leverages the rapid CS1810xx CobraNet Silicon Series, providing mixers, amplifiers, ceiling speakers and developments in the computer networking an interface in the form of a compact, self-powered loudspeakers. industry to provide an increasingly cost- low-power, low-cost module. Featuring CM-2 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 8 or 16 channels at 48 or 96 kHz sample rates. • Quad Synchronous Serial Input Ports – capable of receiving 8 or 16 channels at 48 or up to 96 kHz sample rates. • Studio Grade, Low-Jitter Clock Source – less than 1 ns of jitter. • High Speed Parallel Host Port Interface – interfaces to an optional external control processor. CobraNet Technology Advantages • 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. • Status LEDs – Link, Activity and CobraNet conductor status for each Ethernet jack. • 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-of-thousands of installed nodes in high-profile “mission-critical” venues worldwide • 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 www.cirrus.com Electrical Specifications Host Port Description Direction Power Notes Description Notes System +3.3V, +/-0.25 V, @ .75 A max System ground Host Data In/Out Host port data (x8) VCC +3.3 Host Address In Host port address (x4) GND Host Direction In Host port transfer direction Host Request Out Host port DMA request Host Alert Out Host port interrupt request Host Strobe In Host port select Synchronous Serial (Audio) Ports Description Direction Notes Audio Bit Clock Out Synchronous serial bit clock 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 Master Audio Clock In (optional) In External 24.576 MHz clock input for systems containing multiple ™ CobraNet interfaces Master Audio Clock Out Out Low jitter master 24.576 MHz clock output Reference Clock In Auxiliary reference sample clock input for synchronizing network to an external clock source Operating Temperature Range - 0 to 70 degrees Celsius. Asynchronous Serial Description Direction Notes Serial Receive Data In Serial data receive Serial Transmit Data Out Serial data transmit Transmit Drive Enable Out RS485 multi-drop transmit enable Miscellaneous Description Direction Notes Reset In System reset (active low) Watch Dog Out Continuously toggles to indicate proper operation Interface Ready Out Deasserts during initialization, when fault detected or connection to network is lost Cable Power In/Out Aux RJ-45 pins for Cat-5 powered applications Ethernet Electrical Specifications Physical Specifications • Ethernet Primary Connector – RJ-45 jack. Standard Ethernet pinout. Complies with IEEE 802.3u Standard. • Ethernet Secondary Connector – RJ-45 jack. 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). The module is a 3.5-inch square circuit board, equipped with two Ethernet connectors. Four mounting holes are provided along with an optional bracket for chassis mounting. Connector options are available allowing the module to be mounted in a variety of ways to achieve maximum flexibility in space-limited systems. 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 0088-1004-PB-LP © 2004 Cirrus Logic, Inc. All rights reserved. Product information is subject to change without notice. Cirrus Logic, 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.