SMSC USB2244 User Manual
SMSC USB2244/USB2244i
DATASHEET
Revision 1.0 (05-27-08)
Datasheet
PRODUCT FEATURES
USB2244/USB2244
I
Ultra Fast USB 2.0 SD/MMC
Flash Media Controller
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.
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.
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
— SD Secure
Hardware Features
Single Chip Flash Media Reader/Writer
—
Secure Digital 2.0
–
HS-SD, HC-SD, TransFlash™ and reduced form factor
media
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.
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
Storage Class Drivers