USB2227/USB2228

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 2007-2016 Microchip Technology Inc.

1.0

GENERAL DESCRIPTION

The USB2227/USB2228 is a USB 2.0 Bulk Only Mass Storage Class Peripheral Controller intended for supporting Com-

pactFlash (CF and CF Ultra I/II) in True IDE Mode only, SmartMedia (SM) and XD cards, Memory Stick (MS), Memory

Stick DUO (MSDUO) and Memory Stick Pro (MSPRO), Secure Digital (SD), and MultiMediaCard (MMC) flash memory

devices. It provides a single chip solution for the most popular flash memory cards in the market.

The device consists of a USB 2.0 PHY and SIE, buffers, Fast 8051 microprocessor with expanded scratchpad, and pro-

gram SRAM, and CF, MS, SM and SD controllers. The SD controller supports both SD and MMC devices. SM controller

supports both SM and xD cards.

Provisions for external Flash Memory up to 64K bytes for program storage is provided.

12K bytes of scratchpad SRAM and 768 Bytes of program SRAM are also provided.

Fifteen GPIO pins are provided for indicators, external serial EEPROM for OEM id and system configuration information,

and other special functions.

Internal power FETs are provided to directly supply power to the xD/SM, MMC/SD and MS/MSPro cards.

The internal ROM program is capable of implementing any combination of single or multi-LUN CF/SD/MMC/SM/MS

reader functions with individual card power control and activity indication. Microchip also provides licenses** for Win98

and Win2K drivers and setup utilities. Note: Please check with Microchip for precise features and capabilities for the

current ROM code release.

1.1

Acronyms

SM:

SmartMedia

SMC:

SmartMedia Controller

FM:

Flash Media

FMC:

Flash Media Controller

CF:

Compact Flash

CFC:

CompactFlash Controller

SD:

Secure Digital

SDC:

Secure Digital Controller

MMC:

MultiMediaCard

MS:

Memory Stick

MSC:

Memory Stick Controller

TPC:

Transport Protocol Code.

ECC:

Error Checking and Correcting

CRC:

Cyclic Redundancy Checking