GENERAL DESCRIPTION
The USB97CFDC is an integration of the USB97C102 Enhanced Multi-Endpoint USB Peripheral Controller, without its integrated hub functions, and the SMSC Floppy Disk Controller used in many of its Super IO products, such as the FDC37C869. Special care in the interconnection of the two devices has been taken to assure the lowest possible system current draw (<300µA) during SUSPEND mode operation.

FEATURES
■ 3.3 Volt, Low Power Operation
■ Complete USB Specification 1.1 Compatibility
   - Includes USB Transceiver
   - Based on an Enhanced Version of SMSC’s Industry Proven USB97C100 USB Controller
■ Complete System Solution Including USB Mass Storage Class Compliant Win98/2000 Driver and Firmware
   - Supports 640K, 720K, 1.44M, 1.2M Windows 98 J, and 1.2M NEC DOS 6.x Formats
   - Supports Both the UFI and SFF8070i Command Sets
   - Supports USB Mass Storage Compliant Bootable Floppy BIOS
   - 4ms Seek Times
   - USB 1.1 Compliance, Including Low Power Device Class SUSPEND Mode Operation and Power Control of Disk Drive
   - Disk Drive Feedback of Readiness Upon Power Re-Application Option
   - Option for Ultra High Performance Using Additional Caching SRAM
   - Support for Floppy Drive Power Control
■ Contains SMSC’s Industry Proven Floppy Disk Controller
   - Licensed CMOS 765B Floppy Disk Controller
   - Supports Single Normal or Three Mode Floppy Drives
   - Supports Vertical Recording Format and High Capacity Drives in User Written Firmware Applications
   - Detects All Overrun and Underrun Conditions
   - Sophisticated Power Control Circuitry (PCC) Including Multiple Powerdown Modes for Reduced Power Consumption
■ Enhanced Digital Data Separator
   - 1 Mbps, 500 Kbps, 300 Kbps, 250 Kbps Data Rates
   - Programmable Precompensation Modes
■ Intelligent Auto Power Management
   - <300µA SUSPEND Current
   - <75mA Operating Current
■ External Program Memory Interface
   - 32K Byte Code Space (Supplied Firmware Requires 16KB Memory)
   - Flash, SRAM, or EPROM Memory
■ 4KB Internal Buffer SRAM for High Performance Operation
■ Optional External Cache Memory
   - Up to 16K x 8 External SRAM may be Used for Custom Tape/ Drive Applications
■ Integrated 14.318 MHz Crystal Driver Circuit
■ 100 pin TQFP package (12.0 x 12.0 mm footprint)
   - 25% smaller body size than other 100 pin TQFP packages