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| PHYSICAL LAYER PRODUCT DATACOM PRODUCTS VSC7148 16-Port JBOD Loop Chip for 1.0625 Gb/s FC-AL Storage Applications S P E C I F I C AT I O N S : On-chip terminators selectable as 100/150 ohm 3.3V Power Supply, 4.3 W 256-pin, 27mm Thermally Enhanced BGA BLOCK DIAGRAM: A P P L I C AT I O N S : 1.0625 Gb/s FC-AL JBODs F E AT U R E S : All the Functionality Needed to Implement a Complete DaisyChainable 16-drive 1 Gb/s FC-AL JBOD Subsystem Two Host Ports with Two Pairs of FibreTimerTM Clock Recovery Units (CRUs) Configurable as Either Repeaters or Retimers Sixteen Port Bypass Circuits (PBC) for Drive Control Sixteen PBC Internal Snoop LoopTM for Loop Diagnostics Configurable as Either a Single 16-drive Loop or Two 8-drive Loops I2C Interface for Configuration/Status/Control Seamless Interface to Enclosure Management Chipsets such as the Vitesse SSC100/VSC120/VSC055 for Managed JBOD Applications PB-VSC7148-001 VSC7148 16-Port JBOD Loop Chip for 1.0625 Gb/s FC-AL Storage Applications GENERAL DESCRIPTION: The VSC7148 is typically used to distribute Fibre Channel signals to an array of disk drives in managed and un- managed arrays. The use of an I2C Interface allows access to status information and control of configuration through an easily-implemented, industrystandard, protocol. The VSC7148 easily interfaces with the SSC100 or VSC120 Enclosure Management Controllers to offer unsurpassed diagnostic capability within the industry. The SSC100 (or VSC120) communicates with the VSC7148 through the I2C interface to provide complete loop status, configuration, and diagnostic control to the host. In this configuration, up to fifteen drives on a single loop may be accessed with a single Fibre Channel connector. Serial data from the loop enters the FC-AL port of the SSC100 where the data is processed, returned to the loop, and handed to the VSC7148 for drive communications. In addition, the VSC7148 is the only device on the market that supports two loops within a single device. The External Loop may be configured for all Fibre Channel data traffic while the Snoop A P P L I C AT I O N D I A G R A M : Loop may be used for monitoring or isolating specific ports for diagnostics. With this architecture, a design engineer has the flexibility to offer full Fibre Channel support on the External Loop while isolating error conditions and performing loop diagnostics on the Snoop Loop. When coupled with the SSC100's initiator features, the VSC7148 can provide fault isolation conditions and JBOD quality characteristics back to the host in realtime. When used in a managed JBOD application, the VSC7148/SSC100 chipset allows fault isolation down to the lowest Field Replaceable Unit (FRU) to reduce downtime and support costs, and lead to higher availability. SOFTWARE: The VSC7148 is supported by an API within our enclosure management Software Development Kit (SDK). The SDK includes software to implement a FC transport and SES diagnostic environment. In addition, the SDK also includes a System Services module which provides APIs to the peripheral functionality (interrupts, timers etc.) in the Enclosure Management Controller. The System Services also includes driver libraries for popular I2C devices such as National's LM75, LM78, and many others. RS-232 Ethernet Host Port #1 Repeater Retimer (4) FibreTimer Circuits TM External Loop PBC 0 Snoop Loop External Loop PBC 1 Snoop Loop External Loop PBC 2 Snoop Loop External Loop PBC 3 Snoop Loop External Loop PBC 15 Snoop Loop Host Port #2 Repeater Retimer For more information on Vitesse Products visit the Vitesse web site at www.vitesse.com or contact Vitesse Sales at (800) VITESSE or sales@vitesse.com 741 Calle Plano Camarillo, CA 93012, USA Tel: +1 805.388.3700 Fax: +1 805.987.5896 www.vitesse.com (c)2003 Vitesse Semiconductor Corporation Drive 15 IPMI Drive 1 Drive 2 Drive 3 |
Price & Availability of VSC7148
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