SMSC DS – USB97CFDC

Page 3

Rev. 12/15/2000

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.

Provisions for external Flash Memory up to 32K bytes for program storage is provided.

Although not required for standard floppy operation, provisions for 16K bytes of external buffer SRAM, in addition to

that included in the USB97C102 core, is also provided for extended applications, such as tape drives and for other

special applications.

Several pins are provided for controlling external power control elements and sensing specialized drive functions.

Note:

SMSC has developed and supplies firmware and drivers for this device to implement a standard three mode

or dual mode Floppy Disk Drive system with drive power control. If the customer desires to develop his own

firmware and/or drivers for this system, he may contact SMSC to obtain a complete engineering

specification which details all the internal block functions and register maps of the USB97CFDC to allow

custom programs to be written for this device.