USB2250/50i/51/51i

Ultra Fast USB 2.0 Multi-Slot

Flash Media Controller

PRODUCT FEATURES

Datasheet

 

 

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), SmartMediaTM (SM), xD Picture CardTM (xD)1, Memory StickTM (MS), Secure Digital (SD), and MultiMediaCardTM (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 ReadyBoostTM

1.) xD Picture Card not applicable to USB2251.

SMSC USB2250/50i/51/51i

DATASHEET

Revision 1.1 (05-29-08)