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What is USB2251?

This electronic component, produced by the manufacturer "Microchip", performs the same function as "Ultra Fast USB 2.0 Multi-Slot Flash Media Controller".


USB2251 Datasheet PDF - Microchip

Part Number USB2251
Description Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
Manufacturers Microchip 
Logo Microchip Logo 


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Total 30 Pages



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No Preview Available ! USB2251 datasheet, circuit

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 “i” 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.
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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USB2251 equivalent
USB2250/50i/51/51i
1.1 Acronyms
ATA:
Advanced Technology Attachment
CFC:
Compact Flash Controller
FET:
Field Effect Transistor
LUN:
Logical Unit Number
MMC:
MultiMediaCard
MSC:
Memory Stick Controller
PLL:
Phase-Locked Loop
RoHS:
Restriction of Hazardous Substances Directive
RXD:
Received eXchange Data
SDC:
Secure Digital Controller
SIE: Serial Interface Engine
SMC:
SmartMedia Controller
True IDE Mode: True Integrated Drive Electronics Mode
TXD:
Transmit eXchange Data
UART:
Universal Asynchronous Receiver-Transmitter
UCHAR:
Unsigned Character
UINT:
Unsigned Integer
VTQFP:
Very Thin Quad Flat Package
DS00002005A-page 5
2009 - 2015 Microchip Technology Inc.


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Part Details

On this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for USB2251 electronic component.


Information Total 30 Pages
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