CONTROLLER FOR HIGH-PERFORMANCE

The ST72681 is a USB 2.0 high-speed Flash drive controller. The USB 2.0 high-speed interface including PHY and function supports USB 2.0 mass storage device class. The mass storage controller interface (MSCI) combined with the Reed-Solomon encoder/decoder on-the-fly correction (4-byte on 512-byte data blocks) provides a flexible, high transfer rate solution for interfacing a wide of range NAND Flash memory device types. The internal 60 MHz PLL driven by the 12 MHz oscillator is used to generate the 480 MHz frequency for the USB 2.0 PHY. The ST7 8-bit CPU runs the application program from the internal ROM and RAM. USB data and patch code are stored in internal RAM. I/O ports provide functions for EEPROM connection, LEDs and write protect switch control. The internal 3.3 to 1.8 V voltage regulator provides the 1.8 V supply voltage to the digital part of the circuit.

• USB 2.0 interface compatible with mass storage device class
  • Integrated USB 2.0 PHY supporting USB high speed and full speed
  • Suspend and Resume operations
• Mass storage controller interface (MSCI)
  • Supports 2 KB-page NAND Flash devices including Numonyx, Hynix, Samsung, Toshiba, Micron, Renesas
  • Reed-Solomon encoder/decoder on-the-fly correction (4 bytes of a 512-byte block)
  • Flash identification support
  • Up to 12 MB/s for read and 8 MB/s for write operations in single channel
  • Up to 4 NAND Flash supported per channel
• Embedded ST7 8-bit MCU
• Supply management
  • 3.3 V operation
  • Integrated 3.3-1.8 V voltage regulator
• USB 2.0 low-power device compliant
  • Less than 100 mA during write operation with two NAND Flash devices
  • Less than 500 µA in suspend mode
• AutoRun CDROM partition support
• Bootability support (HDD mode)
• Clock management
  • Integrated PLL for generating core+USB 2.0 clocks from external 12 MHz crystal
• Data protection
  • Write protect switch control
  • Public/private partitions support
• Production tool device configurability:
  • USB vendor ID/product ID (VID/PID), serial number and USB strings with foreign language support
  • SCSI strings
  • One or two LED outputs
  • Adjustable NAND Flash bus frequency to reach highest performance
• Code update in the NAND Flash memory
• LQFP48 7x7 ECOPACK® package
• Development support
  • Complete reference design including schematics, BOM and Gerber files
• Supports Windows (Vista, XP, 2000, ME), Linux and MacOS. Drivers available for Windows 98 SE