General Description

SN11012 is a high-performance integrated circuit to bridge USB and SM/Flash compliance devices. It 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.

特性 Features

● 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.