Introduction

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.

Features

■ USB 2.0 interface compatible with mass storage device class

– Integrated USB 2.0 PHYSupports USB high speed and full speed

– Suspend and Resume operations

■ Mass storage controller interface (MSCI)

– Supports all types of NAND Flash devices including ST, 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 devices supported in a single 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 and USB 2.0 clock sources using an external 12 MHz crystal oscillator

■ 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

■ TQFP48 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