Application Note 10-2: Sharing the Storage Media Interface in SMSC's USB 2.0 Card Reader, Flash Drive, and ATA/ATAPI Products
The USB2223 is a 3rd generation USB 2.0 Flash Card Media controller integrated circuit that provides the interface between a USB Host Controller and Flash Media Cards.
The USB2223 provides a single chip solution for the most popular flash memory cards in the market.
The devices consists of a USB 2.0 device PHY and SIE, buffers, Fast 8051 microprocessor with expanded scratchpad, and program SRAM, and CF, MS, SM and SD controllers. The device can support up to 4 slot operation.
Provision for external Flash Memory up to 64K bytes for program storage is provided.