SMSC USB2250 User Manual

SMSC USB2250/50i/51/51i

Revision 1.1 (05-29-08) 

The SMSC USB2250/50i/51/51i is a USB 2.0 compliant, high
speed Mass Storage Class Peripheral Controller intended for
reading and writing to 

more than

 

24

 

popular flash media

formats from the

 

CompactFlash

® (CF), SmartMedia

TM

 (SM),

 

xD

Picture Card

TM

 (xD)

1

, Memory Stick

TM

 (MS), Secure Digital

(SD), and MultiMediaCard

TM

 (MMC) families. 

The SMSC USB2250/50i/51/51i is a fully integrated, single
chip solution capable of ultra high performance operation.
Average sustained transfer rates exceeding 35MB/s are
possible if the media and host can support those rates. 

„

128-pin VTQFP (14x14mm) 

lead-free RoHS compliant 

package

„

Targeted for applications in which single or "combo" media 

sockets are used

„

Supports multiple simultaneous card insertions

„

Flexible assignment of number of LUNs and how card types 

are associated with the LUNs

„

Hardware-controlled data flow architecture for all self-

mapped media

„

Pipelined hardware support for access to non-self-

mapped media

„

Product name with “i” denotes the version that supports 

the industrial temperature range of -40ºC to 85ºC

„

Single Chip Flash Media Controller with non-multiplexed 

interface for independent card sockets 

„

Flash Media Specification Revision Compliance

—

Compact Flash Specification 4.1

–

CF UDMA Modes 0-4

–

CF PIO Modes 0-6

—

Memory Stick Specification 1.43

—

Memory Stick Pro Format Specification 1.02

—

Memory Stick Pro-HG Duo Format Specification 1.01

–

Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro

—

xD Picture Card 1.2

—

Smart Media Specification 1.3

—

Secure Digital 2.0

–

HS-SD, HC-SD, TransFlash™ and reduced form factor 
media 

—

MultiMediaCard Specification 4.2

–

1/4/8 bit MMC

„

SDIO and MMC Streaming Mode support

„

Extended configuration options

—

xD player mode operation 

—

Socket switch polarities, etc.

„

Media Activity LED

„

GPIO configuration and polarity

—

Up to 11 GPIOs (based on configuration) for special 
function use: LED indicators, button inputs, power 
control to memory devices, etc. The number of actual 
GPIO’s depends on the implementation configuration 
used.

—

Four GPIO’s with up to 200 mA drive

—

An additional 16 GPIO’s if CF is not used

„

On Board 24MHz Crystal Driver Circuit

„

Optional external 24MHz clock input

„

4 Independent Internal Card Power FET

—

200mA each

—

"Fold-back" short circuit current protected

„

8051 8-bit microprocessor

—

60MHz - single cycle execution

—

64KB ROM; 14KB RAM

„

Internal Regulator for 1.8V core operation

„

Optimized pinout improves signal routing, easing 

implementation and allowing for improved signal integrity

„

VID/PID/Language ID

„

28-character Manufacturer ID and Product string

„

12-hex digit (max) Serial Number string

„

Customizable Vendor specific data 

by optional use of 

external serial EEPROM

„

Bus- or Self-powered selection

„

LED blink interval or duration

„

Internal power FET configuration

„

Optimized for low latency interrupt handling

„

Reduced memory footprint

„

Device Firmware Upgrade (DFU) support of external 

EEPROM or External Flash
—

Assembly line support

—

End user field upgrade support

—

DFU Package consists of driver, firmware, sample DFU 
application and source code, DFU driver API

„

Optional custom firmware with external ROM (up to 128k)

„

Please see the USB2250/50i/51/51i

 

Software Release 

Notes for additional Software Features.

„

Flash Media Card Reader/Writer

„

Printers

„

Desktop and Mobile PCs

„

Consumer A/V

„

Media Players/Viewers

„

Vista ReadyBoost

TM

1.) xD Picture Card not applicable to USB2251.