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PDF USB2250 Data sheet ( Hoja de datos )
| Número de pieza | USB2250 | |
| Descripción | Ultra Fast USB 2.0 Multi-Slot Flash Media Controller | |
| Fabricantes | Microchip | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de USB2250 (archivo pdf) en la parte inferior de esta página. Total 30 Páginas | ||
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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 “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
1 page  
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.
5 Page 
USB2250/50i/51/51i
TABLE 5-1: USB2250/50I/51/51I 128-PIN VTQFP PIN DESCRIPTIONS (CONTINUED)
Name
CF DMA request
Symbol
CF_DMARQ /
128-Pin
VTQFP
117
CF DMA
acknowledge
RXD
CF_DMACK
119
Buffer
Type
I
O12
Description
CF_DMARQ: This pin is the DMA request from
the device to the CF controller.
RXD: The signal can be used as input to the
RXD of UART in the device. Custom firmware is
required to activate this function.
CF_nDMACK: This pin is an active low DMA
acknowledge signal for the CF device.
SM Write Protect
SM Address
Strobe
SM Command
Strobe
SM Data 7-0
SM Read Enable
SM_nWP
SM_ALE
SM_CLE
SM_D[7:0]
SM_nRE
SMARTMEDIA (SM) INTERFACE
47 O12PD This pin is an active low write protect signal for
the SM device and has a weak pull-down
resistor that is permanently enabled.
52 O12PD This pin is an active high Address Latch Enable
signal for the SM device and has a weak pull-
down resistor that is permanently enabled.
53 O12PD This pin is an active high Command Latch
Enable signal for the SM device and has a weak
pull-down resistor that is permanently enabled.
39 I/O12PD These pins are the bi-directional data signals
40 SM_D7-SM_D0 and have weak internal pull-
41 down resistors.
42
43
44
45
46
55 O12PU This pin is an active low read strobe signal for
the SM device.
When using the internal FET, this pin has a
weak internal pull-up resistor that is tied to the
output of the internal power FET.
SM Write Enable
SM_nWE
If an external FET is used (internal FET is
disabled), then the internal pull-up is not
available (external pull-ups must be used).
48 O12PU This pin is an active low write strobe signal for
the SM device.
When using the internal FET, this pin has a
weak internal pull-up resistor that is tied to the
output of the internal power FET.
SM Write Protect
Switch
SM Busy or Data
Ready
SM_nWPS
SM_nB/R
38
56
If an external FET is used (internal FET is
disabled), then the internal pull-up is not
available (external pull-ups must be used).
IPU A write-protect seal is detected when this pin is
low. This pin has a weak internal pull-up resistor.
IPU This pin is connected to the BSY/RDY pin of the
SM device.
When using the internal FET, this pin has a
weak internal pull-up resistor that is tied to the
output of the internal power FET.
If an external FET is used (internal FET is
disabled), then the internal pull-up is not
available (external pull-ups must be used).
DS00002005A-page 11
2009 - 2015 Microchip Technology Inc.
11 Page | ||
| Páginas | Total 30 Páginas | |
| PDF Descargar | [ Datasheet USB2250.PDF ] | |
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