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 USB225x
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller Family
General Description
The SMSC USB225x is a family of USB 2.0 compliant, high speed Mass Storage Class Peripheral Controllers intended
for reading and writing to more than 24 popular flash media formats from the CompactFlash® (CF), SmartMedia™ (SM), xD Picture Card™ (xD)1, Memory Stick™ (MS), Secure Digital (SD), and MultiMediaCard™ (MMC) families.
The SMSC USB225x is a fully integrated, single chip solution capable of ultra high performance operation. Average sustained transfer rates exceeding 35MB/s are possible if the media and host can support those rates.
General Features
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128-pin VTQFP lead-free RoHS compliant package |
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Targeted for applications in which single or "combo" media sockets are used. Supports multiple simultaneous card insertions |
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Flexible assignment of number of LUNs and how card types are associated with the LUNs |
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Hardware-controlled data flow architecture for all self-mapped media |
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Pipelined hardware support for access to non-self-mapped media |
Hardware Features
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Single Chip Flash Media Controller with non-multiplexed interface for independent card sockets |
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Flash Media Specification Revision Compliance
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Compact Flash Specification 4.1
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CF UDMA Modes 0-4 |
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CF PIO Modes 0-6 |
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Memory Stick Specification 1.43 |
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Memory Stick Pro Format Specification 1.02 |
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Memory Stick Pro-HG Duo Format Specification 1.01
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Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro |
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xD Picture Card 1.2 |
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Smart Media Specification 1.3 |
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Secure Digital 2.0
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HS-SD, HC-SD, TransFlash™ and reduced form factor media |
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MultiMediaCard Specification 4.2
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1/4/8 bit MMC
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SDIO and MMC Streaming Mode support |
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Extended configuration options
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xD player mode operation |
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Socket switch polarities, etc. |
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Media Activity LED |
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GPIO configuration and polarity
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Up to 11 GPIOs (based on configuration) for special function use: LED indicators, button inputs, power control to memory devices, etc. |
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Four GPIO's with up to 200 mA drive. |
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An additional 16 GPIO's if CF is not used. |
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On Board 24MHz Crystal Driver Circuit |
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Optional external 24MHz clock input |
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4 Independent Internal Card Power FETs
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200mA each |
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"Fold-back" short circuit current protected |
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8051 8-bit microprocessor
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60MHz - single cycle execution |
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64KB ROM; 14KB RAM |
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Internal Regulator for 1.8V core operation |
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Optimized pinout improves signal routing, easing implementation and allowing for improved signal integrity. |
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Supports commercial (0° to 70°C) and industrial (-40° to 85°C) temperature ranges |
OEM Selectable Features
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VID/PID/Language ID |
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28-character Manufacturer ID and Product string |
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12-hex digit (max) Serial Number string |
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Customizable Vendor specific data by optional use of external serial EEPROM |
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Bus- or Self-powered selection |
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LED blink interval or duration |
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Internal power FET configuration |
Software Features
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Optimized for low latency interrupt handling |
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Reduced memory footprint |
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Device Firmware Upgrade (DFU) support of external
EEPROM or External Flash
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Assembly line support |
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End user field upgrade support |
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DFU Package consists of driver, firmware, sample DFU application and source code, DFU driver API |
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Optional custom firmware with external ROM (up to 128k) |
Applications
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Flash Media Card Reader/Writer |
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Printers |
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Desktop and Mobile PCs |
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Consumer A/V |
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Media Players/Viewers |
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Vista ReadyBoost™ |
1 xD Picture Card not applicable to USB2251
USB225x Selector Guide
| Part Number | SD/MMC | xD | MS/MS Pro/
MS Pro-HG | CF/
CF-UDMA | LUN | Internal ROM | -40° to 85°C |
| USB2250 |  | | | | 4 | | |
| USB2250i | | | | | 4 | | |
| USB2251 | | | | | 4 | | |
| USB2251i | | | | | 4 | | |
Ordering Information, Data Sheets and Data Briefs
| Part Number | Package Type | Order Number* | Data Sheet | Data Brief |
| USB2250 | 128 VTQFP | USB2250-NU-XX | 2250_51_59.pdf
File Size = 843K | 2250_51_59db.pdf
File Size = 169K |
| USB2250i | 128 VTQFP | USB2250i-NU-XX | | |
| USB2251 | 128 VTQFP | USB2251-NU-XX | 2250_51_59.pdf
File Size = 843K | 2250_51_59db.pdf
File Size = 169K |
| USB2251i | 128 VTQFP | USB2251i-NU-XX | | |
*Note: "XX" in the order number indicates the internal ROM firmware revision level. Please contact your SMSC sales representative for more information.
All claims made herein speak as of the date of this material. The company does not undertake to update such statements. (4/08)
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