SN11087

2003/7/8 ver 0.3

SN11087

Second Generation USB1.1 Flash Memory Controller

Version 0.3

2003/7/8

1 General Description

SN11087 is a high-performance integrated circuit to access the NAND type Flash memory
via the USB 1.1 bus. It provides a flexible and cost efficient single chip solution for external
storage applications such as USB Disk (Flash Disk). With the capability to be pin-to-pin
compatible to SN11085, the current user of SN11085 can easily upgrade to SN11087 with no
engineering effort needed at all. With all the features inherited from SN11085/086 like the
low 6MHz system clock to reduce the EMI, the embedded translation table to eliminate the
cost of external memory, the Sonix proprietary randomization algorithm to extend the
lifetime of flash memory and ensure the product robustness, and the real time ECC correction
function, the SN 11087 adds several other unique features to reduce the cost of the end
product and meet the customer's requirements.

To enrich the product line of the OEM manufacture, with the ability to support 8 pieces of
flash memories and the new types of 2G bits flashes, SN11087 can be used to build up a
storage device up to 2 Giga bytes. To reduce the total cost of the end product, SN11087
incorporates a power MOS inside to meet the current requirement (500 uA) in USB suspend
state. The usage of EEPROM can also now be eliminated by the capability to program the
customized vendor/product ID/string in the flash itself. Therefore, the total cost is reduced by
upgrade from SN11085 to SN11087.

For fulfilling different customers' needs, SN11087 now provides several ways to build
different end products. The first one is to provide different security functions. The OEM
manufacturers can program one of the two ways in manufacturing via software. The flashing
ways of LED can also be selected by software now. The pin 35 of SN11087 is now used to
support new security feature. The original two security features provided in SN11085/86 still

SN11087

2003/7/8 ver 0.3

exist. The customers can select any one of them during the mass production stage, making
production much easier. With these flexibilities, the manufacturers can easily build
different products by using exactly the same components. The only place needs to be
changed on PCB is pin 35.

The USB Mass Storage Class compliance capability of SN11087 makes it a truly
"plug-and-play" device without vendor drivers under Windows 2000/ME/XP and Mac OS
9/10. SN11087 also provides PC boot up and data security function that exact the same as a
floppy disk (1.44M), which makes it an ideal replacement for the legacy floppy disk.

2 Features

USB 1.1 12 MHz 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
Low system clock (6MHz) to reduce EMI
Customized VID, PID, serial number, and 28 characters of Vendor/Product/Revision

string supported within flash or external EEPROM.

EEPROM in system programmable (ISP) capability
Support Samsung and Toshiba NAND-type flash memory, from 32Mbits to 1Gbits
Support new type of Samsung NAND type flash memory, from 1Gbits to 4Gbits
Real-time ECC correction circuit for data integrity and memory access speed

acceleration

Embedded SRAM for logical-to-physical address translation to extend the life time of

NAND-type flash

Support up to 8 NAND type flash memories are supported
Support up to 2 Gbytes of disk capacity
Embedded FIFO for upstream and downstream data transfer
Built-in power MOS to meet USB suspend requirement (500 uA)
Data transfer rate up to 1.5 MB/s (burst), 1.1 MB/s (read average)
LED indicator pin
Three modes of LED flashing patterns can be selected
Five speed of LED flashing speed provided

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2003/7/8 ver 0.3

PC boot up capability (host BIOS with USB boot up support is necessary)
Flash disk security function provided, up to 16 characters of password for high sensitive

data protection from illegally access

Three types of security functions can be selected
ROM-type flash disk capability provided (permanent write protect)
No Driver needed under Microsoft Windows ME/2000/XP, Mac OS 9.x/10.x
Sonix Driver for Microsoft Windows 98
Sonix mass production tool available for mass production
Sonix security program available
Sonix bonus programs available
Single 3.3V operation
48 pin LQFP package

SN11087

2003/7/8 ver 0.3

3. Pin Assignment

AVDD

AVS S

DP LUS

DMINUS

FLCE8

FLCE6

FLCE4

FLCE2

FLD4

FLD5

FLD3

VDD

XOUT

XIN

TE S T

RS TN

LED1

FLCE7

FLCE5

FLCE3

FLCE1

FLCLE

VDD

I
O

ROM

I
O

DDI

Table 1 SN11087 pin list (red character is the pins different to SN11085)

# pin name type drive special description

1 GND

PWR

Digital ground

2 FLD6

DIO 24mA PD

Flash memory I/O port bit 6

3 FLD2

DIO 24mA PD

Flash memory I/O port bit 2

4 FLD7

DIO 24mA PD

Flash memory I/O port bit 7

5 FLD1

DIO 24mA PD

Flash memory I/O port bit 1

6 FLD0

DIO 24mA PD

Flash memory I/O port bit 0

7 FLWP

24mA

Flash memory write protect

8 FLRB

Flash memory ready/busy

9 FLWE

DIO 24mA

Flash memory write enable

10 FLRE

DIO 24mA

Flash memory read enable

11 FLALE

24mA

Flash memory address latch enable

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2003/7/8 ver 0.3

12 GND

PWR

Digital ground

13 VDD

PWR

Digital 3.3V

14 FLCLE

24mA

Flash memory command latch enable

15 FLCE1

8mA

Flash memory chip enable 1

16 FLCE3

8mA

Flash memory chip enable 3

17 FLCE5

8mA

Flash memory chip enable 5

18 FLCE7

8mA

Flash memory chip enable 7

19 LED

DIO 24mA PD

LED lighter

20 RSTN

Chip reset, connected to external RC circuit

21 TEST

Test pin, NC in normal operation

22 GPIO1

DIO 8mA

Do Not Connect

23 XIN

Crystal input or oscillator input

24 XOUT

Crystal output or no connection

25 VDD

PWR

Digital 3.3V

26 FLVDD

PWR

3.3V power to flash VDD

27 FLPOWER DO

8mA OC

Flash power control, connect to external MOS
Needs to be pulled up externally.

28 GPIO0

DIO 8mA

General Purpose Input/Output 0 for internal test
Always pull up for normal operation

29 ROMCS DO

4mA

Chip select for external EEPROM

30 GND

PWR

Digital ground

31 VDD

PWR

Digital 3.3V

32 ROMSK DO

4mA

Clock for external serial EEPROM

33 ROMDI

4mA

Serial data to external EEPROM

34 ROMDO DI

4mA

Serial data from external EEPROM, pull up
externally if no EEPROM is connected

35 GPIO1

DIO 8mA -

General Purpose Input/Output 1. Pull up/down
depends on operation modes

36 FLWPSW DI

Flash write protect switch

37 AVDD

PWR

Analog 3.3V

38 AVSS

PWR

Analog ground

39 DPLUS

AIO -

USB D+ signal

40 DMINUS AIO -

USB D- signal

41 FLCE8

8mA

Flash memory chip enable 8

42 FLCE6

8mA

Flash memory chip enable 6

Электронный компонент: SN11087