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USB2250 Datasheet, PDF (1/43 Pages) SMSC Corporation – Ultra Fast USB 2.0 Multi-Format Flash Media Controller | |||
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USB2250/50i/51/51i
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
General Description
The Microchip USB2250/50i/51/51i is a USB 2.0 com-
pliant, Hi-Speed mass storage class peripheral control-
ler intended for reading and writing to more than 24
popular flash media formats from the CompactFlash®
(CF), SmartMediaTM (SM), xD-Picture CardTM (xD)1,
Memory Stick® (MS), Secure Digital (SD), and MultiMe-
diaCardTM (MMC) families.
The USB2250/50i/51/51i is a fully integrated, single
chip solution capable of ultra high performance opera-
tion. Average sustained transfer rates exceeding 35
MB/s are possible if the media and host can support
those rates.
Highlights
⢠128-pin VTQFP (14x14 mm) RoHS compliant
package
⢠Targeted for applications in which single or
"combo" media sockets are used
⢠Supports multiple simultaneous card insertions
⢠Flexible assignment of number of LUNs and how
card types are associated with the LUNs
⢠Hardware-controlled data flow architecture for all
self-mapped media
⢠Pipelined hardware support for access to non-
self-mapped media
⢠Order number with âiâ denotes the version that
supports the industrial temperature range of -40ºC
to 85ºC
Hardware Features
⢠Single chip flash media controller with non-multi-
plexed interface for independent card sockets
⢠Flash Media Specification Revision Compliance
- CompactFlash 4.1
- Secure Digital 2.0
- MultiMediaCard 4.2
⢠MMC Streaming Mode support
- Memory Stick 1.43
- Memory Stick Pro Format 1.02
- Memory Stick Duo Format 1.10
- Memory Stick Pro-HG Duo Format 1.01
- xD-Picture Card 1.2
- SmartMedia 1.3
1.) xD-Picture Card not applicable to USB2251.
ï£ 2009 - 2015 Microchip Technology Inc.
⢠Extended configuration options
- xD player mode operation
- Socket switch polarities, etc.
⢠Media Activity LED
⢠On board 24 MHz crystal driver circuit
⢠Optional external 24 MHz clock input
- 4 Independent internal card power FETs
- 200 mA each
- "Fold-back" short circuit protection
⢠8051 8-bit microprocessor
- 60 MHz - single cycle execution
- 64 KB ROM | 14 KB RAM
⢠Internal regulator for 1.8 V core operation
⢠Optimized pinout improves signal routing which
eases implementation for improved signal integ-
rity
OEM Selectable
⢠Vendor, product, and language IDs
⢠Manufacturer ID and product strings (28 charac-
ter)
⢠Serial number string (12h digit max)
⢠Customizable vendor specific data by optional
use of external serial EEPROM
⢠Bus- or self-powered selection
⢠LED blink interval or duration
⢠Internal power FET configuration
Software Features
⢠Optimized for low latency interrupt handling
⢠Reduced memory footprint
⢠Device Firmware Upgrade (DFU) support of exter-
nal EEPROM or External Flash
- Assembly line support
- End user field upgrade support
- DFU Package consists of driver, firmware,
sample DFU application and source code,
DFU driver API
⢠Optional custom firmware with up to 128 KB
external ROM
Applications
⢠Flash Media Card Reader/Writer
⢠Printers
⢠Desktop and Mobile PCs
⢠Consumer A/V
⢠Media Players/Viewers
⢠Vista ReadyBoostTM
DS00002005A-page 1
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