USB 2.0 Flash Drive Controller
 SM321E |
  Overview
The SM321E is a highly compatible, and best performance USB2.0 Flash Disk controller intended for supporting NAND type Flash memory and SPI interface on one chip. It integrates high-speed USB2.0 Transceiver Macro-cell Interface (UTMI) transceiver and Serial Interface Engine (SIE) and an enhanced 80C51 compatible 8-bit microprocessor. Furthermore, SM321E integrated 5V to 3.3V Regulator and Power on Rest IC inside the core, which will save more external component cost.
By complies with USB specification ver.2.0 and USB Mass Storage Class specification ver.1.0, the SM321E can be supported by Windows XP/2000/Me default driver. Also it is supported in Windows 98/98SE, Mac and Linux operating system.
For the power consumption consideration, the SM321E complies with USB power specification ver.2.0 for bus-powered devices. And for the USB2.0 Flash Disk application, the SM321E supports up to 4 data Flash banks, “Write Protect” security function, and PC boot up from USB2.0 Flash Disk.
The SM321E is designed specifically for high-speed performance and high capacity USB2.0 Flash Disks. These USB2.0 Flash Disks can be used as removable storage disk for data exchange applications. With SM321E’s complete software support, users can easily use USB2.0 Flash Disks for backup, and security.
Key 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
- Supports single channel for Flash memory, write data transfer rate up to 14 MB/sec, read data transfer rate up to 18 MB/sec*
- Compatible with 16Mbyte~2Gbyte Samsung & Toshiba’s NAND type Flash
- Supports MLC Flash with 4 bits ECC
- Supports Hynix, ST, and Renenas new Flash chips
- Supports up to 4 data Flash banks
- 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 USB Flash disk
- Supports suspend and wake-up resume
- Integrated 80C51 compatible 8-bit microprocessor with enhanced feature
- Integrated 5-3.3V Voltage Regulator and Power-on-Rest IC.
- 12MHz crystal driver circuit
- Fabricated in 0.162um CMOS process
- 1.8 Volts low power core operation
- Operates on a single power supply (Vdd = 5.0V)
- Available in 48-pin LQFP package and 44-pin LGA package
*The performance may vary on different hardware/software setting
SM321E Block Diagram
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