SN11083
Confidential
2002/6/26
0.2
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USB to Flash Interface Controller, Mass
Storage Class Compliant
1 General Description
SN11083 is a high-performance integrated circuit to bridge USB and Flash
memory. 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. The embedded translation table helps the system makers to
design a high performance NAND type flash device but still keeps the cost low. The
proprietary randomization algorithm effectively extends the lifetime of the 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 SN11083 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 SN11083 also 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, SN11083 is an ideal choice for building a portable USB to Flash storage
system.
SN11083
Confidential
2002/6/26
0.2
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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 supported with external EEPROM
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 NAND-type flash.
l Built-in SRAM to support logical-to-physical address translation for NAND-type
flash to reduce cost and increase performance and reliability
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.
SN11083
Confidential
2002/6/26
0.2
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3 Pin Assignment
Pin# PAD Name Type Drive Special Description
1 GND
PWR
Digital ground
2 FLD6
DIO 8mA PD
Flash data bit 6
3 FLD2
DIO 8mA PD
Flash data bit 2
4 FLD7
DIO 8mA PD
Flash data bit 7
5 FLD1
DIO 8mA PD
Flash data bit 1
6 FLD0
DIO 8mA PD
Flash data bit 0
7 FLWP
DO 8mA
Flash write protect
8 FLRB
DI
Flash ready/busy
9 FLWE
DIO 8mA PD
Flash write enable
10 FLRE
DIO 8mA PD
Flash read enable
11 FLALE
DO 8mA
Flash address latch enable
12 GND
PWR
Digital ground
13 VDD
PWR
Digital 3.3V
14 FLCLE
DO 8mA
Flash command latch enable
15 FLCE
DO 8mA
Flash chip enable
16 NC
Not Connected
17 NC
Not Connected
18 NC
Not Connected
19 LED
DO 8mA PD
LED lighter
20 RSTN
DI
PU
Chip reset
21 TEST
DI
PD
Test pin
22 NC
-
-
No Connect
23 XIN
I
-
-
Crystal input or oscillator input
24 XOUT
O
-
-
Crystal output or no connection
25 NC
-
-
No Connect
26 NC
-
-
No Connect
27 FLPOWER DO 8mA OC
Flash power control
28 GPIO0
DIO 8mA
General Purpose Input/Output 0
SN11083
Confidential
2002/6/26
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29 ROMCS
DIO 4mA
Chip select for external EEPROM
30 GND
PWR
Digital ground
31 VDD
PWR
Digital 3.3V
32 ROMSK DIO 4mA
Clock for external serial EEPROM
33 ROMDI
DIO 4mA
Serial data to external EEPROM
34 ROMDO DIO 4mA
Serial data from external EEPROM
35 NC
-
-
-
No Connect
36 FLWPSW DI
PU
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 NC
Not Connected
42 NC
Not Connected
43 NC
Not Connected
44 NC
Not Connected
45 FLD4
DIO 8mA PD
Flash data bit 4
46 FLD5
DIO 8mA PD
Flash data bit 5
47 FLD3
DIO 8mA PD
Flash data bit 3
48 VDD
P
-
-
Digital 3.3V
P: power pin; AI: analog input pin, AIO: analog input/output pin; DI: digital input pin; DO: digital output
pin; DIO: digital input/output pin.
TTL: TTL compatible input pin; PD: pull down; PU: pull up.
All pads are Schmitt triggered and with slew rate control
SN11083
Confidential
2002/6/26
0.2
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4 Package diagram
LQPF 48 Package
1
2
3
4
5
6
7
8
9
1 0 11 12
36 35 34 33 32 31 30 2 9 2 8 2 7 26 25
13
14
15
16
17
18
19
20
21
22
23
24
4 8
4 7
4 6
4 5
4 4
4 3
4 2
4 1
4 0
3 9
3 8
3 7
G
N
D
F
L
D
6
F
L
D
2
F
L
D
7
F
L
D
1
F
L
D
0
F
L
W
P
F
L
R
B
F
L
W
E
F
L
R
E
F
L
A
L
E
G
N
D
VDD
FLCLE
FLCE
NC
NC
NC
LED
RSTN
TEST
NC
XIN
XOUT
N
C
F
L
W
P
S
W
F
L
P
O
W
E
R
G
P
I
O
0
R
O
M
C
S
G
N
D
V
D
D
R
O
M
S
K
R
O
M
D
I
R
O
M
D
O
N
C
F
L
W
P
S
W
AVDD
AVSS
DPLUS
DMINUS
NC
NC
NC
NC
FLD4
FLD5
FLD3
VDD
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