Silicon Motion SM3257ENLT - Manual

Mobile Storage
Dyna Family
www.siliconmotion.com
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material contained herein, may be reproduced without written consent of the manufacturer.
© Copyright 2013 Silicon Motion, Inc.
High Speed USB2.0 Flash Memory Controller
SM3257ENLT
The SM3257ENLT 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 SM3257ENLT
provides write protect, PC boot-up from USB2.0 Flash
Disk, password protection, secured partitioning
functions, etc.
The SM3257ENLT delivers high data transfer rate,
and ensures data accuracy and reliability with the
powerful ECC engine which can overcome the
read/write disturbances in 3xnm, 2xnm and 1xnm
MLC/TLC flash. By integrating an embedded crystal,
regulators and other components, the controller can
reduce customer overall cost at a system level. The
SM3257ENLT is available for LQFP/TQFP 48-pin
package and QFN 40-pin package with a
manufacturing-ready turnkey solution.
Applications
 USB Flash Drive
 USB Solid State Disk
 Embedded Application
 High-Speed NAND Storage
Key Features
 Embedded crystal offers lower BOM cost
 1.2V low-power core operation
 Built-in 5V/3.3V and 3.3V/1.2V 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 bus-
powered devices
 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 4 NAND flash devices
 Supports Bad Column Management
 Supports the operating systems: Windows
8/7/Vista/XP, Mac OS 10.x and above, and Linux
kernel 2.4 and above
 Supports Windows 8/7/Vista 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 48-pin and QFN 40-pin
packages