High Speed USB2.0 Flash Memory Controller

   The SM3257EN is a feature-enhanced USB2.0 Flash Disk controller with high compatibility and best performance designed to support MLC and TLC NAND flash. The controller also supports high speed ONFI 2.x and Toggle mode NAND. Compliant with USB version2.0 specification and USB Mass Storage Class version 1.0 specification, the SM3257EN provides write protect, PC boot-up from USB2.0 Flash Disk, password protection, secured partitioning functions, etc.

KEY FEATUREs
◾ Embedded crystal offers lower BOM cost
◾ 1.8V low-power core operation
◾ Built-in 5V/3.3V and 3.3V/1.8V voltage regulators
◾ Complete compatibility with USB (Universal Serial
   Bus) Specification Rev. 2.0
◾ Complies with USB Mass Storage Class
   Specification Rev. 1.0
◾ USB Mass Storage Class Bulk-Only Transport
   Protocol
◾ Complies with USB power specifications for buspowered devices
◾ Integrated 80C51-compatible, 8-bit
   microprocessor with enhanced features
◾ Supports suspend mode and wake-up resume
◾ Configurable BCH error control coding (ECC)
◾ Supports high-speed DDR Toggle NAND and
   ONFI NAND flash
◾ Supports MLC/TLC up to 8 NAND flash devices
◾ Supports Bad Column Management
◾ Supports the operating systems: Windows 7,
   Windows Vista, Windows XP, Windows 2000,
   Windows ME, Windows 98/98SE, Mac OS 9.x and
   above, and Linux kernel 2.4 and above
◾ Supports Windows Vista and Windows 7
   ReadyBoost function
◾ In System Programming (ISP) firmware update
   capability
◾ Supports VID, PID, serial number, and vendor
   information updates
◾ Supports LED indicator to indicate the USB Flash
   Disk is in the Ready/Working mode
◾ Supports “Write Protect” security function to
   protect the data in USB Flash Disk
◾ Available in LQFP/TQFP 64/48pin and QFN 40pin

APPLICATIONs
◾ USB Flash Drive
◾ USB Solid State Disk
◾ Embedded Application
◾ High-Speed NAND Storage