SONIX SN11012 Datasheet

Confidential

2002/6/26

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SN11012

USB to SM/Flash Interface Controller, Mass

Storage Class Compliant

1 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. 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.

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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.

SN11012

Confidential

2 Features

l 12 MHz USB 1.1 full-speed compatible.
l USB 1.1 Mass Storage Class compliant
l USB Mass Storage Class Bulk-Only Transport 1.0 supported
l USB Mass Storage Class SCSI transparent command set supported
l 12 characters of serial number and up to 28 characters of

Vendor/Product/Revision string supported with external EEPROM

l Support 3.3V, 4Mbytes to 128 Mbytes SSFDC(SmartMedia Card)
l Support NAND-type flash memory, from 4Mbytes to 128 Mbytes
l Real-time ECC correction circuit to ensure the data integrity and accelerate the

access speed for SmartMedia/NAND-type flash.
l Built-in SRAM to support logical-to-physical address translation for

SmartMedia/NAND-type flash to reduce cost and increase performance and

reliability
l Supports Hot-Swapping among flash memory and SM card without un-plug

USB.

l Built-in FIFO for upstream and downstream data transfer
l Data transfer rate up to 1.5 MB/s (burst), 1.1 MB/s (read average),
l LED lightening pin available.
l PC boot up capability provided (PC BIOS needs to support USB ZIP boot up)

(version 2 only)

l No Driver needed under Microsoft Windows ME/2000/XP, Mac OS 9.x/10.x
l Driver support Microsoft Windows 98
l Single 3.3V operation
l 48 pin LQFP package.

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SN11012

3 Pin Assignment

Pin# PAD Name Type DriveSpecial Description

1GND PWR Digital ground
2SMD6 DIO 8mA PD SM/Flash data bit 6
3SMD2 DIO 8mA PD SM/Flash data bit 2
4SMD7 DIO 8mA PD SM/Flash data bit 7
5SMD1 DIO 8mA PD SM/Flash data bit 1
6SMD0 DIO 8mA PD SM/Flash data bit 0

7SMWP DO 8mA SM/Flash write protect
8SMRB DI SM/Flash ready/busy

Confidential

9SMWE DIO 8mA PD SM/Flash write enable

10SMRE DIO 8mA PD SM/Flash read enable

11 SMALE DO 8mA SM/Flash address latch enable
12GND PWR Digital ground
13VDD PWR Digital 3.3V

14SMCLE DO 8mA SM/Flash command latch enable
15FLCE DO 8mA Flash chip enable
16NC Not Connected
17NC Not Connected
18NC Not Connected
19LED DO 8mA PD LED lighter
20RSTN DI PU Chip reset
21TEST DI PD Test pin
22SMCE DO 8mA SM chip enable
23XIN I - - Crystal input or oscillator input
24XOUT O - - Crystal output or no connection
25SMCDET DI PU SM card detect
26SMWPSW DI PU SM write protect switch

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