USB2251-NU-05 Standard Microsystems (SMSC), USB2251-NU-05 Datasheet - Page 7

• Manufacturer Part Number: USB2251-NU-05
• Description: ULTRA FAST USB 2.0 MULTI-SLOT FLASH MEDI
• Manufacturer: Standard Microsystems (SMSC)

Specifications of USB2251-NU-05

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Ultra Fast USB 2.0 Multi-Slot Flash Media Controller
Datasheet
Chapter 2 Overview
SMSC USB2250/50i/51/51i
The SMSC USB2250/50i/51/51i is a flash media card reader solution fully compliant with the USB 2.0
specification. All required resistors on the USB ports are integrated into the device. This includes all
series termination resistors on D+ and D– pins and all required pull-down and pull-up resistors. The
over-current sense inputs for the downstream facing ports have internal pull-up resistors.
Hardware Features
Software Features
Single chip flash media controller
USB2250/USB2251 supports the commercial temperature range of 0°C to +70°C
USB2250i/USB2251i supports the industrial temperature range of -40°C to +85°C
Up to 11 GPIOs: Configuration and polarity for special function use such as LED indicators, button
inputs, and power control to memory devices
- The number of actual GPIOs depends on the implementation configuration used
- Four GPIOs available with up to 200 mA drive and “fold-back” short circuit protection
8051 8-bit microprocessor
- 60 MHz - single cycle execution
- 64 KB ROM |14 KB RAM
Integrated regulator for 1.8 V core operation
Flash Media Card Specification Revision Compliance
Compact Flash 4.1
- CF UDMA Modes 0-4
- CF PIO Modes 0-6
Secure Digital 2.0
- HS-SD and HC-SD
- TransFlash™ and reduced form factor media
MultiMediaCard 4.2
- 1/4/8 bit MMC
Memory Stick 1.43
Memory Stick Pro Format 1.02
Memory Stick Pro-HG Duo Format 1.01
- Memory Stick, MS Duo, HS-MS, MS Pro-HG, MS Pro
Memory Stick Duo 1.10
Smart Media 1.3
xD-Picture Card 1.2
If the OEM is using an external EEPROM, the following features are available:
- Customizable vendor, product, and device ID’s
- 12-hex digits maximum for the serial number string
- 28-character manufacturer ID and product strings for the flash media reader/writer
DATASHEET
7
Revision 2.0 (09-29-09)