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ST72681 Datasheet(PDF) 2 Page - STMicroelectronics |
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ST72681 Datasheet(HTML) 2 Page - STMicroelectronics |
2 / 12 page ST72681 2/12 1 INTRODUCTION The ST72681 is a USB 2.0 high-speed Flash Drive controller. The USB 2.0 high-speed interface in- cluding PHY and function supports USB 2.0 Mass Storage Device Class. The Mass Storage Controller Interface combined with the Reed-Solomon Encoder/Decoder on-the- fly correction (4-byte on 512-byte data blocks) pro- vides a flexible, high transfer rate solution for inter- facing a wide of range NAND Flash memory de- vice types. The internal 60 MHz PLL driven by the 12MHz os- cillator is used to generate the 480MHz 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 connec- tion, LEDs and write protect switch control. The internal 3.3V to 1.8V voltage regulator pro- vides the 1.8V 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 Regulator GPIO 12 MHz OSC Voltage 1 |
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