JMicron/Products

product brief

Overview
    JMicron JMB394 is a single chip, 1 to 5-ports Serial ATA II Port Multiplier with RAID function support. It is designed to provide SATA port expansion, data protection and performance aggregation at various applications.
    JMB394 uses JMicron's production-proven Multi-port Serial ATA PHY technology and JMicron-proprietary storage processor to provide very high efficient SATA RAID operation. With an easy configuration scheme, the device can be a pure port multiplier which provides SATA port expansion just like a SATA Hub, or hard-drive performance booster which provides a high performance device seen by host controller or hard-drive data protector which automatically backup data to prevent data loss from hard-drive damage. JMB394 also has advance mode to provide both benefit of performance boost and data protection.
    JMB394 is a self-contained storage processor chip which completely frees up the main CPU loading and the SATA ports comply with eSATA specification, making it suitable for use in both internal system and external storage applications

JMB394
1 to 5-ports Serial ATA II RAID-5 Controller with LCM interfaces
product brief Overview JMicron JMB394 is a single chip, 1 to 5-ports Serial ATA II Port Multiplier with RAID function support. It is designed to provide SATA port expansion, data protection and performance aggregation at various applications. JMB394 uses JMicron's production-proven Multi-port Serial ATA PHY technology and JMicron-proprietary storage processor to provide very high efficient SATA RAID operation. With an easy configuration scheme, the device can be a pure port multiplier which provides SATA port expansion just like a SATA Hub, or hard-drive performance booster which provides a high performance device seen by host controller or hard-drive data protector which automatically backup data to prevent data loss from hard-drive damage. JMB394 also has advance mode to provide both benefit of performance boost and data protection. JMB394 is a self-contained storage processor chip which completely frees up the main CPU loading and the SATA ports comply with eSATA specification, making it suitable for use in both internal system and external storage applications

Feature Compliance .Compliant with Serial ATA II Port Multiplier Spec. Revision 1.1 .Compliant with Serial ATA II PHY Electrical Spec. Revision 1.0 .Compliant with Serial ATA High Speed Serialized AT Attachment Spec. Revision 2.5

General .Integrated 6-port SATA II PHY .Integrated PLL for SATA II interface .Total six independent SATA channel .Integrated uP, PROM and SRAM for firmware programming .Integrated high performance RAID storage processor .Fabricated in 0.13um CMOS Standard Logic Process .1.3V core and 3.3V I/O power supply .Available in 100-pin LQFP package

SATA .Supports 6-port 3.0Gbps SATA II interface .Supports SATA II Gen2i and Gen2m (External SATA Connection, eSATA) .Output swing control and automatic impedance calibration for SATA II PHY .Supports asynchronous signal recovery .Supports spread spectrum clocking .Supports partial / slumber power saving mode .Automatically speed negotiation for 3 Gbps or 1.5 Gbps .Supports BIST and loopback mode .Supports staggered spin-up .Supports 48-bit LBA addressing .Supports ATAPI drives .Supports Native Command Queue (NCQ) .Supports Hot-Plug .Supports Asynchronous Notification .Supports PM aware and non-PM aware host

RAID .Fully hardware-accelerated RAID Engine .No driver, BIOS or software required for RAID operation .No external DRAM or processor required for RAID operation .Independent of device SATA port connection sequence .Supports RAID levels: 0 / 1 / 3 / 5 / 10 / JBOD / CLONE .RAID 3 / 5 write-back cache to enhance performance .SATA In-band application interface .Supports more than 2Tera Bytes RAID drive .Supports on-line read data integrity check .Supports on-line command based bad sector recovery .Supports on-line Auto-Rebuild .Rebuild speed: 200GB/hour .Rebuild proceed continuously between power cycling .Supports Hot Spare on RAID .Supports various RAID configuration and monitoring method

GPIO .Supports 32 GPIOs .Supports I2C interface .Supports ISA interface .Supports SPI interface .Supports LED indicators .Supports LCD panel .Supports dual external firmware protection

Application .RAID Subsystem .NAS Servers .Backup Systems .Disk Clone Systems .Serial ATA Enclosures .Large Capacity & High Performance Solid State Drive .Very Large Capacity Disk Systems .SATA Ports Expander