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USB2250 PDF预览

USB2250

更新时间: 2024-12-11 02:55:59
品牌 Logo 应用领域
美国微芯 - MICROCHIP /
页数 文件大小 规格书
43页 472K
描述
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller

USB2250 数据手册

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USB2250/50i/51/51i  
Ultra Fast USB 2.0 Multi-Slot Flash Media Controller  
• Extended configuration options  
General Description  
- 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  
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.  
• Internal regulator for 1.8 V core operation  
• Optimized pinout improves signal routing which  
eases implementation for improved signal integ-  
rity  
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  
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  
• Pipelined hardware support for access to non-  
self-mapped media  
• Order number with “i” denotes the version that  
supports the industrial temperature range of -40ºC  
to 85ºC  
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  
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  
• Optional custom firmware with up to 128 KB  
external ROM  
• 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  
Applications  
• Flash Media Card Reader/Writer  
• Printers  
• Desktop and Mobile PCs  
• Consumer A/V  
- SmartMedia 1.3  
• Media Players/Viewers  
• Vista ReadyBoostTM  
1.) xD-Picture Card not applicable to USB2251.  
2009 - 2015 Microchip Technology Inc.  
DS00002005A-page 1  

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