USB2251
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器件描述：Ultra Fast USB 2.0 Multi-Format Flash Media Controller
器件厂商：SMSC [
SMSC Corporation]
厂商主页：http://www.smsc.com/
文件大小：894.87KB
文件页数：36
PDF阅读：USB2251.pdf (点击阅读器件资料)
摘要：
SMSC USB2250/51/59 DATASHEET Revision 2.6 (05-08-08)
Datasheet
PRODUCT FEATURES
USB2250/51/59
Ultra Fast USB 2.0 Multi-Format
Flash Media Controller
General Description
The SMSC USB2250/51/59 is a USB 2.0 compliant, high
speed Mass Storage Class Peripheral Controller intended for
reading and writing to more than 24 popular flash media
formats from the CompactFlash? (CF), SmartMedia
TM
(SM),
xD Picture Card
TM
(xD)
1
, Memory Stick
TM
(MS), Secure
Digital (SD), and MultiMediaCard
TM
(MMC) families.
The SMSC USB2250/51/59 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
? 128-pin VTQFP lead-free 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
Hardware Features
? Single Chip Flash Media Controller with non-multiplexed
interface for independent card sockets
? Flash Media Specification Revision Compliance
— Compact Flash Specification 4.1
– CF UDMA Modes 0-4
– CF PIO Modes 0-6
— Memory Stick Specification 1.43
— Memory Stick Pro Format Specification 1.02
— Memory Stick Pro-HG Duo Format Specification 1.01
– Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro
— xD Picture Card 1.2
— Smart Media Specification 1.3
— Secure Digital 2.0
– HS-SD, HC-SD, TransFlash? and reduced form factor
media
— MultiMediaCard Specification 4.2
– 1/4/8 bit MMC
? SDIO and MMC Streaming Mode support
? Extended configuration options
— xD player mode operation
— Socket switch polarities, etc.
? Media Activity LED
? GPIO configuration and polarity
— Up to 11 GPIOs (based on configuration) for special
function use: LED indicators, button inputs, power
control to memory devices, etc.
— Four GPIO’s with up to 200 mA drive.
— An additional 16 GPIO’s if CF is not used.
? On Board 24MHz Crystal Driver Circuit
? Optional external 24MHz clock input
? 4 Independent Internal Card Power FETs
— 200mA each
— "Fold-back" short circuit current protected
? 8051 8-bit microprocessor
— 60MHz - single cycle execution
— 64KB ROM
2
; 14KB RAM
? Internal Regulator for 1.8V core operation
? Optimized pinout improves signal routing, easing
implementation and allowing for improved signal integrity.
OEM Selectable Features
? VID/PID/Language ID
? 28-character Manufacturer ID and Product string
? 12-hex digit (max) Serial Number string
? 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 external
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 (Mandatory on the USB2259) custom firmware
with external ROM (up to 128k)
? Please see the USB2250/USB2251 Software Release
Notes for additional Software Features
Applications
? Flash Media Card Reader/Writer
? Printers
? Desktop and Mobile PCs
? Consumer A/V
? Media Players/Viewers
? Vista ReadyBoost
TM
1.) xD Picture Card not applicable to USB2251 2.USB2259 uses external ROM only, internal ROM unavailable
