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Serial Flash Discoverable Parameters,This standard was prepared by the JEDEC SFDP Task Group authorized by the JC-42.4 Committee Chairman. It was derived from prior work done by Intel on their ‘Serial Flash Discoverable Parameters Guidelines’ document
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JEDEC
STANDARD
Serial Flash Discoverable Parameters
(SFDP)
JESD216B
(Revision of JESD216A, July 2013)
MAY 2014
JEDEC SOLID STATE TECHNOLOGY ASSOCIATION
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NOTICE
JEDEC standards and publications contain material that has been prepared, reviewed, and
approved through the JEDEC Board of Directors level and subsequently reviewed and approved
by the JEDEC legal counsel.
JEDEC standards and publications are designed to serve the public interest through eliminating
misunderstandings between manufacturers and purchasers, facilitating interchangeability and
improvement of products, and assisting the purchaser in selecting and obtaining with minimum
delay the proper product for use by those other than JEDEC members, whether the standard is to
be used either domestically or internationally.
JEDEC standards and publications are adopted without regard to whether or not their adoption
may involve patents or articles, materials, or processes. By such action JEDEC does not assume
any liability to any patent owner, nor does it assume any obligation whatever to parties adopting
the JEDEC standards or publications.
The information included in JEDEC standards and publications represents a sound approach to
product specification and application, principally from the solid state device manufacturer
viewpoint. Within the JEDEC organization there are procedures whereby a JEDEC standard or
publication may be further processed and ultimately become an ANSI standard.
No claims to be in conformance with this standard may be made unless all requirements stated in
the standard are met.
Inquiries, comments, and suggestions relative to the content of this JEDEC standard or
publication should be addressed to JEDEC at the address below, or refer to www.jedec.org under
Standards and Documents for alternative contact information.
Published by
©JEDEC Solid State Technology Association 2014
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This document may be downloaded free of charge; however JEDEC retains the
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PRICE: Contact JEDEC
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All rights reserved
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PLEASE!
DON’T VIOLATE
THE
LAW!
This document is copyrighted by JEDEC and may not be
reproduced without permission.
For information, contact:
JEDEC Solid State Technology Association
3103 North 10th Street
Suite 240 South
Arlington, VA 22201-2107
or refer to www.jedec.org under Standards-Documents/Copyright Information.
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JEDEC Standard No. 216B
-i-
SERIAL FLASH DISCOVERABLE PARAMETERS (SFDP) STANDARD
Contents
Page
Foreword
ii
Introduction
ii
1 Scope
1
2 Normative references
1
3 Terms and definitions
1
4 Read SFDP Command Protocol
4.1 Instruction
4.2 Address
4.3 Wait States
4.4 Clock Rate
4.5 Command Modes
3
3
3
3
3
3
5 Read SFDP Behavior
5.1 Security
5.2 Reset and Hold Functions
5.3 Read Wraps
5.4 SFDP Address Boundary Wrap
5.5 Reserved SFDP Locations
5
5
5
5
6
6
6 SFDP Database
6.1 SFDP Header Structure
6.2 SFDP Header
6.3 Parameter Headers
6.4 JEDEC Basic Flash Parameter Header and Tables
6.5 JEDEC Sector Map Parameter Table
6.6 JEDEC 4 Byte Address Instruction Table
6
6
7
8
12
30
39
7 Rules for Header and Table Additions and Modifications
42
8 Legacy Compatibility
42
Annex A (informative) Example SFDP Discovery Code
Annex B (informative) Example SFDP Sector Map Discovery Code
Annex C (informative) Procedure For Requesting Function Specific ID
Annex D (informative) Differences between revisions
43
45
50
50
Figures
1 Read SFDP (1-1-1) Mode Timing Diagram
2 Read SFDP (2-2-2) Mode Timing Diagram
3 Read SFDP (4,4,4) Mode Timing Diagram
4 Overall Header Structure
5 Examples of a Basic SFDP Header and Basic with a Second Parameter Header
6 Examples of an SFDP Header with two basic parameter tables
7 Examples of an SFDP Header with two basic parameter tables and one optional (4 Byte
Addressing) Function Specific table
4
4
5
6
11
11
12
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