VSC7155 Datasheet PDF - Maxim Integrated

Description
   The VSC7155 is a multimode, user-configurable 18-PHY Serial Attached SCSI (SAS) expander. The device provides SAS port expansion as defined by the ANSI T10 Serial Attached SCSI 1.0 and 1.1 specifications for both edge and fanout expanders. The VSC7155 is targeted at embedded applications in the midrange and enterprise storage environments including blade servers, JBODs, and RAID systems. It offers an attractive technology upgrade for those systems that currently employ parallel SCSI technology and have substantial reliance on SCSIcentric applications software or management solutions.

KEY FEATUREs
• 18 SAS Expander PHYs with Integrated SerDes
• Each PHY Can Operate Independently at 1.5Gbps or 3.0Gbps
• Configurable as a SAS Fanout or Edge Expander
• Nonblocking Switch Architecture (Any PHY to Any PHY Connectivity)
• Table Routing (Up to 320 Destination Addresses)
• SMP and SSP Virtual PHY with Initiator and Target Capability
• Embedded Enclosure Management Processor (Stanford-1, 32-Bit RISC) for Local Control and SES Functions
• Four Operating Modes: Parallel Master, Parallel Slave, I²C Serial Interface Slave, and SPI™ Master
• Automatic PHY Speed Detection and Negotiation
• Serial ATA Drive Support Using Internal STP/SATA Bridging Functions (1 per PHY)
• Programmable Output Deemphasis and Input Signal Equalization Levels
• Variable Wide-Port Support

APPLICATIONs/Uses
• Blade Servers
• Disk-Based Backup Storage
• Enterprise Storage Environments
• Fabric Attached Storage (FAS) Systems
• Fixed-Content Storage Systems
• JBOD Arrays
• Modular Direct-Attached Storage (DAS)
• Near-Line Storage Replacement Systems
• Network Attached Storage (NAS) Systems
• Rack-Mounted Servers with RAID
• Storage Area Network (SAN) Appliances