SN11012

 12 MHz USB 1.1 full-speed compatible.
USB 1.1 Mass Storage Class compliant
USB Mass Storage Class Bulk-Only Transport 1.0 supported
USB Mass Storage Class SCSI transparent command set supported
12 characters of serial number and up to 28 characters of Vendor/Product/Revision string supported with external EEPROM
Support 3.3V, 4Mbytes to 128 Mbytes SSFDC(SmartMedia Card)
Support NAND-type flash memory, from 4Mbytes to 128 Mbytes
Real-time ECC correction circuit to ensure the data integrity and accelerate the access speed for SmartMedia/NAND-type flash.
Built- in SRAM to support logical-to-physical address translation for SmartMedia/NAND-type flash to reduce cost and increase performance and reliability
Supports Hot-Swapping among flash memory and SM card without un-plug USB.
Built-in FIFO for upstream and downstream data transfer
Data transfer rate up to 1.5 MB/s (burst), 1.1 MB/s (read average),
LED lightening pin available.
PC boot up capability provided (PC BIOS needs to support USB ZIP boot up)(version 2 only)
No Driver needed under Microsoft Windows ME/2000/XP, Mac OS 9.x/10.x
Driver support Microsoft Windows 98
Single 3.3V operation
48 pin LQFP package.

SN11012 is a high-performance integrated circuit to bridge USB and SM/Flash compliance devices. SN11012 provides a  flexible and cost efficient single chip solution for external storage applications that intend to utilize the convenience of USB. To help the system manufacturers to build high quality, low cost USB storage systems, several special features are implemented. SN11012 can be easily configured to access SM and/or NAND type flash devices. With supporting flash memory capability, the combo system which supports both card reader and thumb drive can be built without any special effort. The embedded translation table help the system makers to design a high performance SM card or NAND type flash accessing device but still keeps the cost low. The proprietary randomization algorithm effectively extends the lifetime of the SM card and flash memory, ensuring the robustness of the system. The real time ECC correction keeps the data integrity while still maintains the high data transfer rate.

The external serial EEPROM provides the possibility to customize the USB identity for each product. The OEM makers could make products for different customers by just putting the vendor/product ID and names in the EEPROM but still keep other things the same. The serial number can help the system manufacturers to track down every single device they made even when the design and the PID/VID are all the same. The USB Mass Storage Class compliance capability of SN11012 makes it a truly "plug-and-play" device without vendor drivers needed under the OS like Windows 2000/ME/XP and Mac OS 9/10. This feature not only makes the system developing faster and easier, but also reduces the cost and increases the reliability.The SN11012 even provides the capability to boot the PC.Therefore, the system manufacturers can use it to build a much faster, high capacity, reliable, and portable system to replace the legacy floppy disk easily.

With so many functions built-in and the high performance, easy to design- in architecture, SN11012 is an ideal choice for building a portable USB to SM/Flash storage system.