SMSC USB2640/USB2641
Revision 2.0 (10-03-08)
DATASHEET
PRODUCT FEATURES
Datasheet
USB2640/USB2641
Ultra Fast USB 2.0 Multi-Format
Flash Media Controller/USB
Hub Combo
General Description
The SMSC USB2640/USB2641 is a USB 2.0 compliant, Hi-
Speed hub for USB port expansion with an attached mass
storage class peripheral controller. The controller allows
read/write capability to popular flash media formats from the
following families:
xD-Picture Card
TM
(xD)
1
Memory Stick
TM
(MS)
Secure Digital
TM
(SD)
MultiMediaCard
TM
(MMC)
The USB2640/USB2641 is a fully integrated, single chip
solution providing USB expansion and integrated flash card
media reader/writer capability of ultra high performance
operation. Average sustained transfer rates exceeding 35 MB/s
are possible if the media and host can support those rates.
Highlights
48-pin QFN package
Hub controller with internally connected ultra fast flash
media reader/writer and 2 exposed downstream ports for
external peripheral expansion
Flash media reader/writer employs multiplexed card
interfaces which are optimized for use with single card
insertion combo sockets
Hardware-controlled data flow architecture for all self-
mapped media
Optional support for external firmware access via SPI
interface
1.xD-Picture Card not applicable to USB2641.
Features
Single chip flash media controller
Transaction translator (TT) in the hub supports operation of
FS and LS peripherals
Over 30 port configuration options
Customizable vendor ID, product ID, language ID
On board 24 MHz crystal driver circuit
Optional external 24 MHz clock input
GPIO configuration and polarity: Up to 8 GPIOs for special
function use
Internal card power FET
8051 8-bit microprocessor
Internal regulator for 1.8V core operation
Optimized pinout improves signal flow, easing
implementation and allowing for improved signal integrity
treatment
Optimized for low latency interrupt handling
Hub and flash media reader/writer configuration from a
single source: External I
2
C ROM or external SPI ROM
EEPROM update via USB
Please see the USB2640/USB2641 Software Release Notes
for additional software features
Applications
Printers
Desktop and Mobile PCs
Consumer A/V
Media Players/Viewers
Vista ReadyBoost
™
