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Common Flash Interface Spec
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Common Flash Interface Spec from AMD
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Common Flash Memory Interface
Specification
Release 2.0
December 1, 2001
AMD
1 AMD Place, Sunnyvale, CA 94088-3453
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CFI SPECIFICATION AGREEMENT
This is a royalty-free, reciprocal patent license for parties wishing to adopt the CFI Specification in
their products. By making use of this specification, you (“User”) are agreeing to be bound by the
terms of this agreement. If you do not agree to them, then you have no license to use the specification,
and you should destroy these materials or return them to the CFI Promoter from whom this Agreement was
obtained.
“CFI Specification” means a revision of the “Common Flash Interface Specification,” numbered 1.0 or
greater, published and made available for industry licensing by the CFI Promoters.
“CFI Promoters” means Intel Corporation, Advanced Micro Devices, Fujitsu Limited, and Sharp
Corporation.
Agreement: Effective as of User’s acceptance of this Agreement, and subject to its terms and conditions
CFI Promoters and User agree as follows:
License: CFI Promoters and User each grant to the other and its subsidiaries, under any claim of a patent or
patent application otherwise infringed, a non-exclusive, royalty-free, non-transferable, world-wide license,
without rights to sublicense, to make or have made such party’s products which comply with the CFI
Specification solely in connection with meeting the CFI Specification, and to use, sell, offer to sell, and
import such products, where infringement of such claims would not have occurred but for the incorporation
of the CFI Specification in such products, and there is no feasible alternative to such infringement.
No Other Licenses. Except for the rights expressly provided by this Agreement, neither party grants or
receives, by implication, or estoppel, or otherwise, any rights under any patents or other intellectual
property rights.
LIMITATION OF LIABILITY
: The CFI Specification is provided "AS IS" without warranty of any
kind. THE CFI PROMOTERS OFFER NO WARRANTY EITHER EXPRESS OR IMPLIED
INCLUDING THOSE OF MERCHANTABILITY, NONINFRINGEMENT OF THIRD-PARTY
INTELLECTUAL PROPERTY OR FITNESS FOR A PARTICULAR PURPOSE. THE CFI
PROMOTERS SHALL NOT BE LIABLE FOR ANY DAMAGES WHATSOEVER (INCLUDING,
WITHOUT LIMITATION, DAMAGES FOR LOSS OF BUSINESS PROFITS, BUSINESS
INTERRUPTION, LOSS OF BUSINESS INFORMATION, OR OTHER LOSS) ARISING OUT OF THE
USE OF OR INABILITY TO USE THE CFI SPECIFICATION, EVEN IF THE CFI PROMOTERS
HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. BECAUSE SOME
JURISDICTIONS PROHIBIT THE EXCLUSION OR LIMITATION OF LIABILITY FOR
CONSEQUENTIAL OR INCIDENTAL DAMAGES, THE ABOVE LIMITATION MAY NOT APPLY.
TERMINATION OF THIS LICENSE
: The CFI Promoters may terminate this license at any time if you
are in breach of any of its terms and conditions. Upon termination, you will immediately destroy the CFI
Specification or return all copies of the same you have made to the CFI Promoters.
U.S. GOVERNMENT RESTRICTED RIGHTS
: The CFI Specification is provided with "RESTRICTED
RIGHTS." Use, duplication or disclosure by the Government is subject to restrictions set forth in
FAR52.227-14 and DFAR252.227-7013 et seq.
or its successor. Use of the CFI Specification by the
Government constitutes acknowledgment of CFI Promoters’ rights in them .
APPLICABLE LAWS
: Any claim arising under or relating to this Agreement shall be governed by the
laws of Delaware. You may not export the CFI Specification or products in compliance thereto in violation
of applicable export laws.
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CFI SPECIFICATION
Revision Record
Edition Date Published Revised Contents
1.00 07/25/1996 First Draft Release
2.00 12/01/2001 Second Draft Release
Notice
This Specification is hereby provided to you for your use subject to the terms of the
enclosed CFI Specification Agreement.
AMD retains the right to make changes to this document at any time, without notice.
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Table of Contents
1. Introduction
1.1. Purpose
1.2. Scope
2. CFI Overview
2.1. CFI Operational Summary
3. CFI Hardware Interface
3.1. CFI Query Command Interface
3.2. Query Structure Output
3.3. CFI Query Structure
4. Extensibility
5. Appendix
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1. CFI Introduction
1.1. Purpose
The Common Flash Interface (CFI) specification outlines device and host system
software interrogation handshake that allows specific vendor-specified software
algorithms to be used for entire families of devices. This allows device-independent,
JEDEC ID-independent, and forward- and backward-compatible software support for the
specified flash device families. It allows flash vendors to standardize their existing
interfaces for long-term compatibility.
1.2. Scope
This release of the specification defines the basic Query interface for CFI-compliant
devices. This allows parameterization of known and future flash Read/Write/Erase
control interfaces. This Query structure attempts to define all the critical parameters
relevant to a broad base of flash memory devices. The CFI specification will not specify
detail command sets, status polling methods, and software algorithms of individual flash
vendors. A 16-bit ID code is assigned to specific manufacturers’ interfaces, and it is up
to that manufacturer to provide these detailed specifications.
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