USB to SATA3 bridge supports UASP
September 05, 2011 // Phil Ling
The SuperSpeed Universal Serial Bus (USB 3.0) SATA3 bridge system-on-chip ([SoC] from Renesas enables data transfer between a USB3.0 host system and a Serial ATA (SATA) device in external USB storage equipment. The new SoC is claimed to be the world's first USB 3.0 Bridge SoC that supports the UASP (USB Attached SCSI Protocol).
In response to the need for even faster data transfer performance necessary with the increased scale of the data handled in the storage device market, Renesas has released the µPD720230 bridge SoC. This device, combined with its host-controller technology and UASP driver software, achieves industry-leading data transfer performance, according to the company.
In addition to working with its USB 3.0 host controllers, the UASP driver operates with AMD’s A70M and A75 chipsets, which has been made possible through close cooperation with AMD. Renesas also plans on achieving compatibility with AMD’s future USB3-supporting chipsets.
Key features of the new µPD720230 SoC include support for SATA Revision 3.0, which enables 6 Gbps high-speed data transfer, SuperSpeed USB transfer speeds of up to 5 gigabits per second (Gbps)—as well as the SATA Revision 3.0 6Gbps bit rate achieving maximum data transfer performance of USB 3.0. Support for both the UASP and BOT protocols achieves data transfer performance that exceeds 370 megabytes per second (MB/s) in UASP mode.
In addition to the BOT standard for mass storage devices using USB 2.0, it also supports the UASP protocol standardized in USB 3.0 for improving the performance limits of the BOT standard. When connected to an SSD that supports 6 Gbps SATA3, the µPD720230 device achieves data transfer performance in excess of 370 MB/s in UASP mode as verified by the ATTO Disk Benchmark, version 2.46.
Although only two states, the U0 normal state and the U3 suspend state were stipulated in the USB 2.0 standard, the USB 3.0 standard also stipulates the U1 and U2 power states to provide even finer-grained suppression of power consumption. The new USB 3.0 SATA3 SoC reduces overall power consumption by approximately 40 percent (when the system is in the idle state) via the new USB 3.0 U1 and U2 power states, as compared to when stipulating only the U0 and U3 power states..
Renesas’ UASP driver is also available for license to companies making USB 3.0 to SATA3 bridge devices. A license of Renesas’ UASP driver is included with the company’s µPD720230 USB 3.0 to SATA3 Bridge and is available for license to other SATA bridge manufacturers. Renesas has already concluded a licensing agreement with Japanese LSI supplier Media Logic. Mass production is scheduled to begin in October 2011 with a combined production volume of 500,000 units per month expected.
Switch to LED lighting cuts cruising energy costs by 60 percent
February 27, 2015
Europe’s leading holiday cruise company, Costa Cruises has upgraded ten of the company's fleet of cruise liners with more ...
Semitrex' ultimate goal: "one size fits all" power conversion
Porsche rainmaker advocates platooning
Radar-based sensor network helps drivers finding a parking spot
Xilinx flexes its muscles in the ADAS arena
The future of custom ASICs
February 26, 2015
With the prevailing view that Moore's Law is slowing Donnacha O’Riordan, director of services strategy for S3 Group, gives ...
Dual nanowire structure absorbs light efficiently
5 trends to watch at Mobile World Congress
Infineon: CAN FD success goes at the expense of FlexRay
- Software-Defined Radio Handbook
- A Four-Quadrant DC/DC Switching Regulator Smoothly Transitions from Positive to Negative Output Voltages for FPGA and Other Applications
- LED Driver with Integrated Spread Spectrum Reduces EMI without Adding Flicker
- Accelerate SDN and NFV with Off-the-Shelf Software
InterviewInfineon: CAN FD success goes at the expense of FlexRay
The faster version of the venerable CAN bus, CAN FD is currently taking off at several carmakers. Infineon's Thomas Böhm, Head of Body / Automotive, believes this could well go at the expense of FlexRay. ...
Filter WizardCheck out the Filter Wizard Series of articles by Filter Guru Kendall Castor-Perry which provide invaluable practical Analog Design guidelines.
Linear video channel
READER OFFERRead more
To ensure you have a good start in 2015, Freescale is giving away five of its QorIQ TWR-LS1021A Tower system modules, worth USD269 each, for EETimes Europe's readers to win.
The module is the most feature-rich and high-performance Tower system offered by Freescale, enabling compatibility and interoperability with the growing list of Tower expansion modules, offering an easily accessible...MORE INFO AND LAST MONTH' WINNERS...
December 15, 2011 | Texas instruments | 222901974
Unique Ser/Des technology supports encrypted video and audio content with full duplex bi-directional control channel over a single wire interface.