Introduction

ST72682

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Introduction

The ST72682 is a USB 2.0 high-speed Flash drive controller. The USB 2.0 high-speed

interface includes PHY and function and 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 bytes on 512-byte data blocks), provides a flexible

high transfer rate solution for interfacing a wide of range NAND Flash memory devices.

The internal 60 MHz PLL driven by the 12 MHz oscillator is used to generate the 480 MHz

frequency required 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.

The I/O ports provide allow to connect EEPROM, LEDs and a 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.

Figure 1.

Device block diagram

USB 2.0

USB 2.0

Function

Mass

Controller

PHY

Storage

Interface

Reed-

Solomon

Error

Correction

NAND

I/F

8-bit

CPU

ROM

RAM

3.3V to 1.8V

voltage

GPIO

12 MHz

OSC

regulator