USB2244/USB2244I

Ultra Fast USB 2.0 SD/MMC

Flash Media Controller

PRODUCT FEATURES

Datasheet

 

 

General Description

The SMSC USB2244/USB2244i is a USB 2.0 compliant, high speed Bulk Only Mass Storage Class Peripheral Controller intended for reading and writing to SD/MMC Flash Media Cards.

The SMSC USB2244/USB2244i 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. Provisions to read/write secure media formats is also provided.

General Features

„36-pin QFN (6x6mm) lead-free RoHS compliant package

„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

„Support included for secure media format on a licensed, customized basis

— SD Secure

Mask Programmable Features

„VID/PID/Language ID

„28-character Manufacturer ID and Product string

„12-hex digit (max) Serial Number string

„Customizable Vendor specific data LED blink interval or duration

Software Features

„Optimized for low latency interrupt handling

„Reduced memory footprint

„Please see the USB2244/USB2244i 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

„Compatible with Microsoft Vista, Windows XP, Windows ME, Windows 2K SP4, Apple OSx, and Linux Mass Storage Class Drivers

Hardware Features

„Single Chip Flash Media Reader/Writer

—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

—Socket switch polarities, etc.

„Media Activity LED

„GPIO configuration and polarity

—Up to 8 GPIOs for special function use: LED indicators, power control to memory devices, etc. The number of actual GPIO’s depends on the implementation configuration used.

—One GPIO with up to 200 mA drive

„On Board 24MHz Crystal Driver Circuit

„Internal Card Power FET

—200mA

—"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

SMSC USB2244/USB2244i

DATASHEET

Revision 1.0 (05-27-08)