ST72681 STMicroelectronics, ST72681 Datasheet - Page 4

• Manufacturer Part Number: ST72681
• Description: USB 2.0 HIGH-SPEED 8-BIT MCU FLASH DRIVE CONTROLLER
• Manufacturer: STMicroelectronics

Introduction
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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.
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.
Figure 1.
12 MHz
3.3 V to 1.8 V
USB 2.0 USB 2.0
Device block diagram
OSC
PHY
regulator
voltage
Function
8-bit
CPU
Controller
Interface
Storage
ROM
Mass
GPIO
Correction
Solomon
Reed-
RAM
Error
NAND
I/F
ST72681