Standard Microsystems is a registered trademark of Standard Microsystems Corporation, and SMSC is a trademark of Standard Microsystems
Corporation. Product names and company names are the trademarks of their respective holders. Circuit diagrams utilizing SMSC products are included
as a means of illustrating typical applications; consequently complete information sufficient for construction purposes is not necessarily given. Although
the information has been checked and is believed to be accurate, no responsibility is assumed for inaccuracies. SMSC reserves the right to make
changes to specifications and product descriptions at any time without notice. Contact your local SMSC sales office to obtain the latest specifications
before placing your product order. The provision of this information does not convey to the purchaser of the semiconductor devices described any
licenses under the patent rights of SMSC or others. All sales are expressly conditional on your agreement to the terms and conditions of the most
recently dated version of SMSC's standard Terms of Sale Agreement dated before the date of your order (the "Terms of Sale Agreement"). The product
may contain design defects or errors known as anomalies which may cause the product's functions to deviate from published specifications. Anomaly
sheets are available upon request. SMSC products are not designed, intended, authorized or warranted for use in any life support or other application
where product failure could cause or contribute to personal injury or severe property damage. Any and all such uses without prior written approval of an
Officer of SMSC and further testing and/or modification will be fully at the risk of the customer. Copies of this document or other SMSC literature, as well
as the Terms of Sale Agreement, may be obtained by visiting SMSC’s website at http://www.smsc.com.
SMSC DISCLAIMS AND EXCLUDES ANY AND ALL WARRANTIES, INCLUDING WITHOUT LIMITATION ANY AND ALL IMPLIED WARRANTIES
OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, TITLE, AND AGAINST INFRINGEMENT, AND ANY AND ALL WARRANTIES
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IN NO EVENT SHALL SMSC BE LIABLE FOR ANY DIRECT, INCIDENTAL, INDIRECT, SPECIAL, PUNITIVE, OR CONSEQUENTIAL DAMAGES,
OR FOR LOST DATA, PROFITS, SAVINGS OR REVENUES OF ANY KIND; REGARDLESS OF THE FORM OF ACTION, WHETHER BASED ON
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POSSIBILITY OF SUCH DAMAGES.
SMSC DS – USB97CFDC
Page 2
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.
SMSC DS – USB97CFDC
Page 3
Rev. 12/15/2000
TABLE OF CONTENTS
GENERAL DESCRIPTION............................................................................................................................3
DESCRIPTION OF PIN FUNCTIONS ...........................................................................................................5
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