For   example :   writer/read  HID  device  or  U-disk

2,  Compatible  Fat32 or Fat16  file system,

3,   Not   support   long  file  name, or    low    transmit   rate  . The   SOC(MCU) 

      would   reduce  cost.

4,   IF   MCU   support   longer   file  name  ,would not   cheaper

5,   Not   51  MCU  +  CH375(SL811) .Only  single  IC   realize  USB   host   . Without Additional  FLASH   memory  IC.

Feature:

    a, USB host like controller for embedded mass storage (USB Flash Disk)  or HID  class. 

   b,Embedded 8-bit microprocessor ，Support Dual USB Host interface

    c,Supports full-speed (12 Mbps) USB transfers only

    d,Support single device to host data transfer

   e,6MHz crystal/oscillator to reduce cost and EMI

   f,.3.0~5.5V power source ， 48/64 pin LQFP  or die chip.

Support command:

Search Path ，Serach File ， New Path .Stream Read ，Stream Write ，Extend name Setup ,Format Disk ， Free size scan , Delete file .