a. 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/sim card support

. support mmc 4.0/4.1/4.2, rs-mmc, mmc-mobile
. support sd 1.1/2.0, mimi sd, micro sd card
. support sd/mmc high speed mode
. support sim card interface for module mobile equipment
. software ap support for sim card editing
. 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 which supports 4 bit data (mmc) only