Small capacity U disk Application


Overview

CH331 is a small-capacity U-disk controller that can be used to implement a small-capacity U-disk with a capacity of 2K to 512K by adding a IIC interface serial storage chip and simple peripheral circuits. CH9331 is a small-capacity U-disk controller that can be used to implement a small-capacity U-disk with a capacity of 512K to 16M by adding a SPI interface serial storage chip and simple peripheral circuits. The U disk implemented by CH331 or CH9331 has the same functions as the U disk on the market, and can be read, written, formatted, etc. normally. The figure below shows the diagram of its general application.

Features

  • Full-speed USB device interface, USB 2.0 compatible.
  • U disk can be realized by simply adding IIC EEPROM memory or SPI FLASH memory.
  • Comply with relevant USB specifications and support U disk boot.
  • Supports WINDOWS 10/8/7/XP/Vista/Server/98 operating system, no drivers are required except WINDOWS 98.
  • Supports normal formatting under WINDOWS and provide dedicated formatting tools to optimize disk space utilization.
  • RoHS compliant SOP-16, SSOP-20 lead-free package.

Development Information

  1. Please review the related datasheet for the CH331 and CH9331 chip functions.
  2. Due to the wide variety of SPI interface FLASH on the market, you can customize according to the FLASH type provided by the customer.
  3. Customized for specific encryption U disk, USBKEY, etc.