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SMSC USB2244/USB2244i DATASHEET Revision 1.0 (05-27-08)
Datasheet
PRODUCT FEATURES
USB2244/USB2244I
Ultra Fast USB 2.0 SD/MMC
Flash Media Controller
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
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
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 ReadyBoost
TM
Compatible with Microsoft Vista, Windows XP, Windows
ME, Windows 2K SP4, Apple OSx, and Linux Mass
Storage Class Drivers