SM321

Description

The SM321 is a highly compatible, and best performance USB2.0 Flash Disk controller intended for supporting Single-Channel SLC & MLC NAND type Flash memory in one chip.

For the power consumption consideration, the SM321 complies with USB power specification ver.2.0 for bus-powered devices. And for the USB2.0 Flash Disk application, the SM321 supports up to 4 data Flash banks, "Write Protect" security function, and PC boot up from USB2.0 Flash Disk.

The objective of the SM321 controller is to drastically increase the USB Flash memory data transfer rate as well as reduce the overall system cost by offering a manufacturing-ready turnkey solution to customers. The SM321 is available in 48-pin QFP (7mmx7mm) and 44-pin LGA (5mmx5mm) package.

Figure 1: SM321 Block Diagram


Features
  • Completes USB specification ver.2.0 compatibility
  • Complies with USB Mass Storage Class specification ver.1.0
  • Bulk Only transport protocol
  • Complies with USB power specifications for bus-powered devices
  • Operating system supported: Windows XP/2000/Me/98/98SE, Mac OS 9.X/X, Linux Kernel 2.4 and above
  • Master SPI (Serial Peripheral Interface) for flexible applications.
  • Supports single channel for Flash memory, Maximum data transfer rate up to 18* MB/sec
  • Compatible with 16Mbyte~1Gbyte NAND type Flash and up to 4 banks
  • Supports MLC Flash with 4 bit ECC
  • Supports VID, PID, serial number & vender information update
  • Provides LED indicator when USB Flash Disk is in Ready/Working mode
  • Supports "Write Protect" security function to protect data in UFD
  • Supports suspend and wake-up resume
  • Integrated 80C51 compatible 8-bit microprocessor with enhanced feature
    - Requiring just two clocks per machine cycle
  • 12MHz crystal driver circuit
  • Fabricated in 0.18um CMOS process
  • 1.8 Volts low power core operation
  • Operates on a single power supply (Vdd = 3.3V)
  • Available in 48-pin QFP(7mmx7mm) and 44-pin LGA(5mmx5mm) package
    *This figure may vary on different platform



 
 

Copyright © 2005. Silicon Motion Technology Corp. All rights reserved.