PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
Literature Number: SLLSE67
March 2011
TUSB9261
SLLSE67–MARCH 2011
www.ti.com
Contents
1MAIN FEATURES ................................................................................................................ 5
1.1TUSB9261 Features ........................................................................................................ 5
•Allows for Greater Jitter Tolerance in the Receiver
– USB Class Support
•USB Attached SCSI Protocol (UASP)
•USB Mass Storage Class Bulk-Only Transport (BOT)
•Support for Error Conditions Per the 13 Cases (Defined in the BOT Specification)
•USB Bootability Support
•USB Human Interface Device (HID)
– Supports Firmware Update Via USB, Using a TI Provided Application
• SATA Interface
– Serial ATA Specification Revision 2.6
•gen1i, gen1m, gen2i, and gen2m
– Support for Mass-Storage Devices Compatible With the ATA/ATAPI-8 Specification
• Integrated ARM Cortex M3 Core
– Customizable Application Code Loaded From EEPROM Via SPI Interface
– Two Additional SPI Port Chip Selects for Peripheral Connection
– Up to 12 GPIOs for End-User Configuration
•2 GPIOs Have PWM Functionality for LED Blink Speed Control
– Serial Communications Interface for Debug (UART)
• General Features
– Integrated Spread Spectrum Clock Generation Enables Operation from a Single Low Cost Crystal or
Clock Oscillator
•Supports 20, 25, 30 or 40 MHz
– A JTAG Interface is Used for IEEE1149.1 and IEEE1149.6 Boundary Scan
– Available in a Fully RoHS Compliant Package
1.2Target Applications
• External HDD/SSD
• External DVD
• External CD
• HDD-Based Portable Media Player
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas
Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.
PRODUCTION DATA information is current as of publication date.
Products conform to specifications per the terms of the Texas
Instruments standard warranty. Production processing does not
necessarily include testing of all parameters.
(1) USB connection is made at either SuperSpeed or High-Speed depending on the upstream connection support.
TUSB9261
TUSB9261
www.ti.com
3INTRODUCTION
3.1System Overview
The TUSB9261 is an ARM cortex M3 microcontroller based USB 3.0 to serial ATA bridge. It provides the
necessary hardware and firmware to implement a USB attached SCSI protocol (UASP) compliant mass
storage device suitable for bridging hard disk drives (HDD), solid state disk drives (SSD), optical drives
and other compatible SATA 1.5-Gbps or SATA 3.0-Gbps devices to a USB 3.0 bus. In addition to UASP
support, the firmware implements the mass storage class bulk-only transport (BOT), and USB human
interface device (HID) interfaces.
SLLSE67–MARCH 2011
3.2Device Block Diagram
The major functional blocks are as follows:
•Cortex M3 microcontroller subsystem including the following peripherals:
– Time interrupt modules, including watchdog timer
– Universal asynchronous receive/transmit (SCI)
– Serial peripheral interface (SPI)
– General purpose input/output (GPIO)
– PWM for support of PWM outputs (PWM)
•USB 3.0 Core (endpoint controller) and integrated USB 3.0 PHY
•AHCI compliant SATA controller and integrated SATA PHY
– Supporting gen1i, gen1m, gen2i, and gen2m