. Features
. USB

. Fully compatible with USB 2.0/1.1 specification
. Support USB 2.0 specification for 480Mbit/sec and 12Mbit/sec
operation
. USB Device Class Definition for Mass Storage , Bulk-Transport
v1.0
. USB 2.0 Bus Power device spec. compliance
. Endpoint:
. Endpoint 0: 64 bytes control transfer.
. Endpoint 1: 512 bytes bulk transfer for IN transaction.
. Endpoint 2: 512 bytes bulk transfer for OUT transaction.
. MMC/SD card Support

. Support MMC 4.0/4.1/4.2 (4 bit & 8bit), RS-MMC, MMC-Mobile
. Support SD 1.1/2.0 SDHC, Mimi SD, Micro SD card
. Support SD/MMC High Speed Mode
. Work with the default driver from windows 2000/XP/ME, Mac9.2,

Mac OS X, Linux RedHat, Linux Fedora

. Integrated 5V to 3.3V/1.8V Voltage Regulator

. Integrated PLL with 12MHz crystal input

. Support package with Chip On Board (COB)

. 28 pin SSOP package for 4 bit and 8 bit card

. 28 pin SSOP is backward compatible with M121

. 24 pin QFN 4x4 package for 4 bit card.