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PDF USB2244I Data sheet ( Hoja de datos )
| Número de pieza | USB2244I | |
| Descripción | Ultra Fast USB 2.0 SD/MMC Flash Media Controller | |
| Fabricantes | SMSC Corporation | |
| Logotipo |  |
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USB2244/USB2244I
Ultra Fast USB 2.0 SD/MMC
Flash Media Controller
PRODUCT FEATURES
Datasheet
General Description
The SMSC USB2244/USB2244i is a USB 2.0 compliant,
high speed Bulk Only Mass Storage Class Peripheral
Controller intended for reading and writing to SD/MMC Flash
Media Cards.
The SMSC USB2244/USB2244i 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.
Provisions to read/write secure media formats is also
provided.
General Features
36-pin QFN (6x6mm) lead-free RoHS compliant package
Hardware-controlled data flow architecture for all self-
mapped media
Pipelined hardware support for access to non-self-
mapped media
Product name with “i” denotes the version that supports
the industrial temperature range of -40ºC to 85ºC
Support included for secure media format on a licensed,
customized basis
— SD Secure
Hardware Features
www.DataSheet4SUin.cgolemChip Flash Media Reader/Writer
— 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
— Socket switch polarities, etc.
Media Activity LED
GPIO configuration and polarity
— Up to 8 GPIOs for special function use: LED indicators,
power control to memory devices, etc. The number of
actual GPIO’s depends on the implementation
configuration used.
— One GPIO with up to 200 mA drive
On Board 24MHz Crystal Driver Circuit
Internal Card Power FET
— 200mA
— "Fold-back" short circuit current protected
8051 8-bit microprocessor
— 60MHz - single cycle execution
— 64KB ROM; 14KB RAM
Internal Regulator for 1.8V core operation
Optimized pinout improves signal routing, easing
implementation and allowing for improved signal integrity
Mask Programmable Features
VID/PID/Language ID
28-character Manufacturer ID and Product string
12-hex digit (max) Serial Number string
Customizable Vendor specific data LED blink interval or
duration
Software Features
Optimized for low latency interrupt handling
Reduced memory footprint
Please see the USB2244/USB2244i 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 ReadyBoostTM
Compatible with Microsoft Vista, Windows XP, Windows
ME, Windows 2K SP4, Apple OSx, and Linux Mass
Storage Class Drivers
SMSC USB2244/USB2244i
DATASHEET
Revision 1.0 (05-27-08)
1 page  
Ultra Fast USB 2.0 SD/MMC Flash Media Controller
Datasheet
List of Tables
Table 3.1 USB2244/2244i 36-Pin QFN Package. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Table 5.2 USB2244/2244i 36-Pin QFN Pin Descriptions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Table 5.3 USB2244/USB2244i Buffer Type Descriptions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Table 6.1 USB2244/USB2244i Pin Reset States . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Table 7.1 Pin Capacitance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Table 10.1 USB2244/USB2244i GPIO Usage (ROM Rev 0x00). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
www.DataSheet4U.com
SMSC USB2244/USB2244i
5
DATASHEET
Revision 1.0 (05-27-08)
5 Page 
Ultra Fast USB 2.0 SD/MMC Flash Media Controller
Datasheet
Table 5.2 USB2244/2244i 36-Pin QFN Pin Descriptions (continued)
NAME
SYMBOL
24MHz Crystal
or external clock
input
24MHz Crystal
XTAL1
(CLKIN)
XTAL2
3.3V Analog
Power
1.8V PLL Power
VDDA33
VDD18PLL
General Purpose GPIO1 (LED1)
I/O
General Purpose GPIO2 / RXD /
I/O SDA
www.DataSheGete4Une.croaml Purpose GPIO4
I/O
General Purpose GPIO7 /
I/O TXD /
SCK
General Purpose GPIO10
I/O (CRD_PWR)
General Purpose GPIO14
I/O
RESET Input
nRESET
36-PIN
QFN
33
32
36
BUFFER
TYPE
DESCRIPTION
ICLKx
OCLKx
This pin can be connected to one terminal of
the crystal or it can be connected to an external
24 clock when a crystal is not used.
This is the other terminal of the crystal, or it can
be left open when an external clock source is
used to drive XTAL1(CLKIN). It may not be
used to drive any external circuitry other than
the crystal circuit.
3.3V Analog Power
34 This pin is the 1.8V Power for the PLL.
+1.8V Filtered analog power for internal PLL.
This pin must have a 1.0μF(or greater) ±20%
(ESR <0.1Ω) capacitor to VSS.
MISC
1
I/O12
This pin may be used either as input, edge
sensitive interrupt input, or output.
In addition, as an output, the GPIO1 can use
output controlled by the LED1_GPIO1 register.
27
I/O12
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
I RXD: In addition to the above, the signal can
be used as input to the RXD of UART in the
device, when the TXD_RXD_SEL bit in
UTIL_CONFIG1 register is cleared to "0".
I/O12
SDA: This is the data pin when used with an
external serial EEPROM.
29
I/O12
This pin may be used either as input, edge
sensitive interrupt input, or output.
31
I/O12
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
O12 TXD: In addition, as an output, the GPIO7 can
be used as an output TXD of UART in the
device, when the GPIO2/TXD bit in
UTL_CONFIG register is set to "1"
O12 SCK: This is the clock output when used with
an external EEPROM.
21
I/O200
GPIO: This pin may be used either as input,
edge sensitive interrupt input, or output.
CRD_PWR: Card Power drive of 3.3V @ either
100mA or 200mA.
19
I/O12
This pin may be used either as input, edge
sensitive interrupt input, or output.
18 IS
This active low signal is used by the system to
reset the chip. The active low pulse should be
at least 1μs wide.
SMSC USB2244/USB2244i
11
DATASHEET
Revision 1.0 (05-27-08)
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet USB2244I.PDF ] | |
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