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SMSC USB2250/50i/51/51i DATASHEET Revision 1.1 (05-29-08)
Datasheet
PRODUCT FEATURES
USB2250/50i/51/51i
Ultra Fast USB 2.0 Multi-Slot
Flash Media Controller
General Description
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.
General Features
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
Hardware Features
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
OEM Selectable Features
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
Software Features
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.
Applications
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.