USB2251
Description
The Microchip USB2250/50i/51/51i is a USB 2.0 pliant, Hi-Speed mass storage class peripheral controller intended for reading and writing to more than 24 popular flash media formats from the pactFlash® (CF), SmartMediaTM (SM), xD-Picture CardTM (xD)1, Memory Stick® (MS), Secure Digital (SD), and MultiMediaCardTM (MMC) families.
Key Features
- Single chip flash media controller with non-multiplexed interface for independent card sockets
- Flash Media Specification Revision pliance - pactFlash 4.1 - Secure Digital 2.0 - MultiMediaCard 4.2
- 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 integrity OEM Selectable
