pic mcu code:This application note describes the design and

implementation of a USB Mass Storage Device (MSD)

using a Secure Digital card, which should prove useful

to developers of USB mass storage solutions. This

application may be used as a stand-alone MSD or as a

Secure Digital/Multimedia Card (SD/MMC) reader/

writer interface.-pic mcu code : This application note describes the design and implementation of a USB Mass Storage Device (MS D) using a Secure Digital card, which should prove useful to developers of USB m ass storage solutions. This application may be used as a stand-alone MSD or as a Secure Digital / Multimedia Card (SD / MMC) reader / writer inter face.