4th Generation USB 2.0 Flash Media Controller with
Integrated Card Power FETs
Highlights
• Complete System Solution for interfacing Smart-
Media
™
(SM) or xD Picture Card
™
(xD)
1
, Memory
Stick
®
(MS), High Speed Memory Stick (HSMS),
Memory Stick PRO (MSPRO), MS Duo
™
, Secure
Digital (SD), Mini-Secure Digital (Mini-SD), Trans-
Flash (SD), MultiMediaCard
™
(MMC), Reduced
Size MultiMediaCard (RS-MMC), NAND Flash,
Compact Flash
®
(CF) and CF Ultra
™
I & II, and
CF form-factor ATA hard drives to USB 2.0 bus
- Supports USB Bulk Only Mass Storage Com-
pliant Bootable BIOS
• Support for simultaneous operation of all above
devices. (only one at a time of each of the follow-
ing groups supported: CF or ATA drive, SM or XD
or NAND, SD or MMC)
• On-Chip 4-Bit High Speed Memory Stick and MS
PRO Hardware Circuitry
• On-Chip firmware reads and writes High Speed
Memory Stick and MS PRO
• 1-bit ECC correction performed in hardware for
maximum efficiency
• Hardware support for SD Security Command
Extensions
• On-chip power FETs for supplying flash media
card power with minimum board components
• USB Bus Power Certified
• 3.3 Volt I/O with 5V input tolerance on VBUS/
GPIO3
• Complete USB Specification 2.0 Compatibility for
Bus Powered Operation
- Includes USB 2.0 Transceiver
- A Bi-directional Control and a Bi-directional
Bulk Endpoint are provided.
• 8051 8 bit microprocessor
- Provides low speed control functions
- 30 Mhz execution speed at 4 cycles per
instruction average
- 12K Bytes of internal SRAM for general pur-
pose scratchpad
- 768 Bytes of internal SRAM for general pur-
pose scratchpad or program execution while
re-flashing external ROM
• Double Buffered Bulk Endpoint
- Bi-directional 512 Byte Buffer for Bulk End-
point
- 64 Byte RX Control Endpoint Buffer
- 64 Byte TX Control Endpoint Buffer
• Internal or External Program Memory Interface
- 64K Byte Internal Code Space or Optional
64K Byte External Code Space using Flash,
SRAM or EPROM memory.
• On Board 24Mhz Crystal Driver Circuit
• Can be clocked by 48MHz external source
• On-Chip 1.8V Regulator for Low Power Core
Operation
• Internal PLL for 480Mhz USB 2.0 Sampling, Con-
figurable MCU clock
• Supports firmware upgrade via USB bus if “boot
block” Flash program memory is used
• 15 GPIOs for special function use: LED indica-
tors, button inputs, power control to memory
devices, etc.
- Inputs capable of generating interrupts with
either edge sensitivity
- Attribute bit controlled features:
- Activity LED polarity/operation/blink rate
- Full or Partial Card compliance checking
- Bus or Self Powered
- LUN configuration and assignment
- Write Protect Polarity
- SmartDetach Detach from USB when no
Card Inserted for Notebook apps
- Cover Switch operation for xD compliance
- Inquiry Command operation
- SD Write Protect operation
- Older CF card support
- Force USB 1.1 reporting
- Internal or External Power FET operation
• Compatible with Microsoft WinXP, WinME, Win2K
SP3, Apple OS10, Softconnex, and Linux Multi-
LUN Mass Storage Class Drivers
• Win2K, Win98/98SE and Apple OS8.6 and OS9
Multi-LUN Mass Storage Class Drivers available
from Microchip
• 128-Pin VTQFP RoHS Compliant Package
(14mm x 14mm footprint, 1.0mm height)
1.xD Picture Card not applicable to USB2227
2007-2016 Microchip Technology Inc.
DS00002256A-page 1
USB2227/USB2228
TO OUR VALUED CUSTOMERS
It is our intention to provide our valued customers with the best documentation possible to ensure successful use of your Microchip
products. To this end, we will continue to improve our publications to better suit your needs. Our publications will be refined and
enhanced as new volumes and updates are introduced.
If you have any questions or comments regarding this publication, please contact the Marketing Communications Department via
E-mail at
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We welcome your feedback.
Most Current Data Sheet
To obtain the most up-to-date version of this data sheet, please register at our Worldwide Web site at:
http://www.microchip.com
You can determine the version of a data sheet by examining its literature number found on the bottom outside corner of any page.
The last character of the literature number is the version number, (e.g., DS30000000A is version A of document DS30000000).
Errata
An errata sheet, describing minor operational differences from the data sheet and recommended workarounds, may exist for cur-
rent devices. As device/documentation issues become known to us, we will publish an errata sheet. The errata will specify the
revision of silicon and revision of document to which it applies.
To determine if an errata sheet exists for a particular device, please check with one of the following:
• Microchip’s Worldwide Web site;
http://www.microchip.com
• Your local Microchip sales office (see last page)
When contacting a sales office, please specify which device, revision of silicon and data sheet (include -literature number) you are
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DS00002256A-page 2
2007-2016 Microchip Technology Inc.
USB2227/USB2228
Table of Contents
1.0 General Description ........................................................................................................................................................................ 4
5.0 DC Parameters ............................................................................................................................................................................. 15
6.0 Package Information ..................................................................................................................................................................... 19
Appendix A: Data Sheet Revision History ........................................................................................................................................... 21
The Microchip Web Site ...................................................................................................................................................................... 22
Customer Change Notification Service ............................................................................................................................................... 22
Customer Support ............................................................................................................................................................................... 22
Product Identification System ............................................................................................................................................................. 23
2007-2016 Microchip Technology Inc.
DS00002256A-page 3
USB2227/USB2228
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
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