JESD245E 2022：Byte Addressable Energy Backed Interface标准详解

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"JESD245E是2022年更新的JEDEC标准，关于Byte Addressable Energy Backed Interface的最新版本。这个标准详细规定了一种字节寻址的能源支持接口，用于在存储和其他电子系统中实现高效、可靠的数据交换。JESD245E是对2020年7月版本JESD245D的修订，旨在促进设备间的一致性和互操作性，以及提高产品的性能。" JESD245E标准由JEDEC固态技术协会发布，这是一个国际知名的电子组件和系统标准组织，致力于推动电子行业的创新和发展。此标准的制定经过JEDEC董事会的审查和批准，并且经过JEDEC法律顾问的进一步审查，确保其内容的合法性和适用性。该标准的核心是“Byte Addressable Energy Backed Interface”，这是一种能量备份接口设计，它允许系统在断电或低功耗状态下仍能保持数据完整性。这种接口对于能源敏感的应用，如嵌入式系统、移动设备和数据中心至关重要，因为它能够有效地管理能源消耗，同时提供高数据可靠性。标准中包含的关键技术特点可能包括： 1. **字节寻址**：接口支持按字节进行数据访问，提高了数据处理的灵活性和效率。 2. **能源备份**：设计有机制在电源故障时保存数据，确保数据不丢失。 3. **兼容性和互操作性**：通过定义统一的标准，不同制造商的产品可以无缝对接，降低系统集成的复杂度。 4. **性能优化**：可能涉及高速数据传输、低延迟和低功耗设计，以满足现代电子系统的严苛要求。 5. **错误检测与纠正**：可能包含错误检测和纠正机制，增强系统的容错能力。 JEDEC标准的发布不考虑是否涉及任何专利，这意味着采用该标准的公司需要自己解决可能的知识产权问题。尽管如此，JEDEC的目的是通过消除制造商和购买者之间的误解，协助购买者快速准确地选择和获取合适的产品，以服务公众利益。总体来说，JESD245E标准是电子行业的一个重要参考，特别是在设计高效、节能的存储解决方案时。开发人员和工程师可以根据这个标准来设计和实现新的硬件接口，确保产品符合业界最佳实践，并且与其他系统兼容。

JEDEC Standard No. 245E

-xii-

Foreword

This standard has been prepared by JEDEC. The purpose of this standard is definition of a byte

addressable energy backed function on a non-volatile dual in-line memory module (NVDIMM). This

standard defines the feature set and commands implemented by the byte addressable energy backed

function on an NVDIMM-N.

Introduction

An NVDIMM-N is a memory module that can be integrated into a standard platform. A Byte Addressable

Energy Backed Function on a NVDIMM is designed to preserve data in the event of the power failure. A

Byte Address Energy Backed Function is backed by a combination of SDRAM and non-volatile memory

(e.g., NAND flash) on the NVDIMM-N. It operates at SDRAM speeds and provides persistent storage by

backing up the SDRAM contents into the non-volatile memory in the event of a power failure or other

triggers. This is made possible by an Energy Source (e.g., supercapacitor) which maintains charge on the

module enabling back-up of data from SDRAM to the non-volatile memory (NVM), providing a storage-

class memory solution. The module may also support the ability to encrypt the SDRAM contents before

backing up to the NVM.

To be able to provide interoperability and the ability for platform and platform software (e.g., BIOS) to

support NVDIMM-Ns from various manufacturers, standardization of the host to module interface,

discovery mechanism, the feature set and command operations are required, as described in this standard.

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JEDEC

JEDEC Document No. 245E

Page 1

BYTE ADDRESSABLE ENERGY BACKED INTERFACE

(From JEDEC Board Ballot JCB-21-43, formulated under the cognizance of the JC-45.6 Subcommittee

on Hybrid Modules, item 2233.54G.)

1 Scope

This standard specifies the host and device interface for a DDR4 NVDIMM-N, which is a DIMM that

achieves non-volatility by copying SDRAM contents into non-volatile memory (NVM) when host power

is lost using an Energy Source managed by either the module or the host.

Although this standard is targeted towards DDR4 NVDIMM only, it does not preclude adoption of this

standard by other implementations (e.g., DDR3 NVDIMM).

2 Normative References

2.1 Overview

The normative documents listed in this clause contain provisions that, through reference in this text,

constitute provisions of this standard. For dated references, subsequent amendments to, or revisions of,

any of these publications do not apply. However, parties to agreements based on this standard are

encouraged to investigate the possibility of applying the most recent editions of the normative documents

indicated below. For undated references, the latest edition of the normative document referred to applies.

2.2 JEDEC Standards

JESD21C Page 4.20.28 DDR4 SDRAM Registered DIMM Design Standard, Revision 1.00 (August 2015)

JESD21C Page 4.1.2.L-4 Annex L: Serial Presence Detect (SPD) for DDR4 SDRAM Modules (DDR4

SPD Document Release 4)

JESD21C Page 4.1.6 Definitions of the EE1004-v 4 Kbit Serial Presence Detect (SPD) EEPROM and

TSE2004av 4 Kbit SPD EEPROM with Temperature Sensor (TS) for Memory Module Applications

JESD79-4B DDR4 SDRAM (June 2017)

JESD82-31 DDR4 Registering Clock Driver – DDR4RCD01 (August 2016)

JESD82-31A DDR4 Registering Clock Driver – DDR4RCD02 (forthcoming)

JESD82-32 DDR4 Data Buffer – DDR4DB01 (August 2016)

JESD82-32A DDR4 Data Buffer – DDR4DB02 (forthcoming)

JESD245 Byte Addressable Energy Backed Interface (December 2015)

JESD245A Byte Addressable Energy Backed Interface (September 2016)

JESD245B.01 Byte Addressable Energy Backed Interface (September 2017)

JESD248A DDR4 NVDIMM-N Design Standard (March 2018)

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JEDEC

JEDEC Standard No. 245E

Page 2

2.3 Management Interface Standards

C Bus Specification Revision 6 (4 April 2014)

System Management Bus (SMBus) Specification Version 3.0 (20 December 2014)

2.4 NIST (National Institute of Standards and Technology) Standards

The U.S. Department of Commerce National Institute of Standards and Technology (NIST) Information

Technology Laboratory (ITL) Computer Security Division (CSD) develops Federal Information

Processing Standards (FIPS) and Special Publications (SPs) for computer security at https://csrc.nist.gov

• FIPS 180-4 Secure Hash Standard (SHS) (August 2015)

o https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.180-4.pdf

• FIPS 186-4 Digital Signature Standard (DSS) (July 2013)

o https://nvlpubs.nist.gov/nistpubs/FIPS/NIST.FIPS.186-4.pdf

• FIPS 197 Advanced Encryption Standard (AES) (26 November 2001)

o https://csrc.nist.gov/publications/fips/fips197/fips-197.pdf

• SP800-38D Recommendation for Block Cipher Modes of Operation: Galois/Counter Mode

(GCM) and GMAC (November 2007)

o https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38d.pdf

• SP800-38E Recommendation for Block Cipher Modes of Operation: The XTS-AES Mode for

Confidentiality on Storage Devices (January 2010)

o https://csrc.nist.gov/publications/detail/sp/800-38e/final

• SP800-38F Recommendation for Block Cipher Modes of Operation: Methods for Key Wrapping

(December 2012)

o https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-38f.pdf

• SP800-88 Guidelines for Media Sanitization (Rev 1, December 2014)

o https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-88r1.pdf

• SP900-90A Recommendation for Random Number Generation Using Deterministic Random Bit

Generators (Revision 1, June 2015)

o https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-90Ar1.pdf

• SP800-90B Recommendation for the Entropy Sources Used for Random Bit Generation (January

2018)

o https://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-90B.pdf

o overview at https://csrc.nist.gov/groups/ST/rbg-workshop-2016/presentations/Session-I-

1-john-kelsey-presentation.pdf

• SP800-90C Recommendation for Random Bit Generator (RBG) Constructions (Second Draft)

(April 2016)

o https://csrc.nist.gov/publications/drafts/800-90/sp800_90c_second_draft.pdf

o overview at https://csrc.nist.gov/groups/ST/rbg-workshop-2016/presentations/SessionI-2-

elaine-barker-presentation.pdf

• SP800-108 Recommendation for Key Derivation Using Pseudorandom Functions (October 2009)

o https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-108.pdf

• SP800-132 Recommendation for Password-Based Key Derivation Part 1: Storage Applications

(December 2010)

o https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-132.pdf

• SP800-147 BIOS Protection Guidelines (April 2011)

o https://nvlpubs.nist.gov/nistpubs/Legacy/SP/nistspecialpublication800-147.pdf

• SP800-147B BIOS Protection Guidelines for Servers (August 2014)

o http://nvlpubs.nist.gov/nistpubs/SpecialPublications/NIST.SP.800-147B.pdf

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JEDEC

JEDEC Standard No. 245E

Page 3

2.5 NIST CAVP (Cryptographic Algorithm Validation Program)

The Cryptographic Algorithm Validation Program (CAVP) provides validation testing of cryptographic

algorithms at https://csrc.nist.gov/groups/STM/cavp

• The Advanced Encryption Standard Algorithm Validation Suite (AESAVS) (15 November 2002)

o https://csrc.nist.gov/groups/STM/cavp/documents/aes/AESAVS.pdf

• The XTS-AES Validation System (XTSVS) (5 September 2013)

o https://csrc.nist.gov/groups/STM/cavp/documents/aes/XTSVS.pdf

• The NIST SP800-90A Deterministic Random Bit Generator Validation System (DRBGVS)(29

October 2015)

o https://csrc.nist.gov/groups/STM/cavp/documents/drbg/DRBGVS.pdf

• Secure Hash Standard Validation System (SHAVS)

o https://csrc.nist.gov/groups/STM/cavp/documents/shs/SHAVS.pdf

• Keyed-Hash Message Authentication Code Validation System (HMACVS)

o https://csrc.nist.gov/groups/STM/cavp/documents/mac/HMACVS.pdf

• The Key Wrap Validation System (KWVS)

o https://csrc.nist.gov/groups/STM/cavp/documents/mac/KWVS.pdf

• Key Derivation using Pseudorandom Functions (SP800-108) Validation System (KBKDFVS)

o https://csrc.nist.gov/groups/STM/cavp/documents/KBKDF800-108/kbkdfvs.pdf

2.6 NIST CMVP (Cryptographic Module Validation Program)

The Cryptographic Module Validation Program (CMVP) validates cryptographic modules at

http://csrc.nist.gov/groups/STM/cmvp

• NIST FIPS PUB 140-2 Security Requirements for Cryptographic Modules (25 May 2001)

o https://csrc.nist.gov/publications/fips/fips140-2/fips1402.pdf

• Implementation Guidance for FIPS PUB 140-2 and the Cryptographic Module Validation

Program (7 May 2019)

o https://csrc.nist.gov/groups/STM/cmvp/documents/fips140-2/FIPS1402IG.pdf

• Derived Test Requirements for FIPS PUB 140-2 (4 January 2011)

o https://csrc.nist.gov/groups/STM/cmvp/documents/fips140-2/FIPS1402DTR.pdf

2.7 IEEE Standards

The IEEE Security in Storage Working group defined data-at-rest encryption modes at http://siswg.net

• IEEE 1619-2018 Standard for Cryptographic Protection of Data on Block-Oriented Storage

Devices

o For sale at https://standards.ieee.org/findstds/standard/1619-2018.html

2.8 Common Criteria Standards

Common Criteria standards and their testing requirements are developed by the 27 country members of

the Common Criteria Recognition Agreement at https://www.commoncriteriaportal.org

• Common Criteria for Information Technology Security Evaluation – Part 1: Introduction and

general model (Version 3.1 Revision 4, September 2012)

o https://www.commoncriteriaportal.org/files/ccfiles/CCPART1V3.1R4.pdf

• Common Criteria for Information Technology Security Evaluation – Part 2: Security functional

components (Version 3.1 Revision 4, September 2012)

o https://www.commoncriteriaportal.org/files/ccfiles/CCPART2V3.1R4.pdf

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JEDEC

JEDEC Standard No. 245E

Page 4

2.8 Common Criteria Standards (cont’d)

• Common Criteria for Information Technology Security Evaluation – Part 3: Security assurance

components (Version 3.1 Revision 4, September 2012)

o https://www.commoncriteriaportal.org/files/ccfiles/CCPART3V3.1R4.pdf

• Common Methodology for Information Technology Security Evaluation – Evaluation

methodology (Version 3.1, Revision 4, September 2012)

o https://www.commoncriteriaportal.org/files/ccfiles/CEMV3.1R4.pdf

The USA representative to CCRA is the National Information Assurance Partnership at https://www.niap-

ccevs.org.

Common Criteria Protection Profiles for Full Drive Encryption and their testing requirements are

developed by the Common Criteria Full Disk Encryption work group at

https://www.commoncriteriaportal.org/communities/fde.cfm

• collaborative Protection Profile for Full Drive Encryption - Encryption Engine

(cPP_FDE_EE)(Version 2.0, 22 September 2016)

o https://www.commoncriteriaportal.org/files/ppfiles/CPP_FDE_EE_V2.0.pdf

• Supporting Document (Mandatory Technical Document) for Full Drive Encryption: Encryption

Engine (Version 1.0, January 2015)

o https://www.commoncriteriaportal.org/files/ppfiles/CPP_FDE_EE_V2.0_supporting_doc

.pdf and https://www.commoncriteriaportal.org/files/supdocs/CCDB-2015-01-004.pdf

• collaborative Protection Profile for Full Drive Encryption - Authorization Acquisition

(cPP_FDE_AA)(Version 2.0, 22 September 2016)

o https://www.commoncriteriaportal.org/files/ppfiles/CPP_FDE_AA_V2.0.pdf

• Supporting Document (Mandatory Technical Document) for Full Drive Encryption:

Authorization Acquisition (Version 1.0, January 2015)

o https://www.commoncriteriaportal.org/files/ppfiles/CPP_FDE_AA_V2.0_supporting_do

c.pdf and https://www.commoncriteriaportal.org/files/supdocs/CCDB-2015-01-003.pdf

2.9 TCG (Trusted Computing Group) Standards

The Trusted Computing Group defines standards for secure and trusted computing at

https://trustedcomputinggroup.org

. The Storage Working Group defines storage security interfaces at

https://trustedcomputinggroup.org/work-groups/storage.

• TCG Storage Interface Interactions Specification (SIIS), Version 1.08, Revision 1.00 (26 October

2018)

o https://trustedcomputinggroup.org/resource/storage-work-group-storage-interface-

interactions-specification

• TCG Storage Security Subsystem Class: Opal Version 2.01 Revision 1.00 (5 August 2015)

o https://trustedcomputinggroup.org/resource/storage-work-group-storage-security-

subsystem-class-opal

• TCG Storage Security Subsystem Class: Ruby Version 1.00 Revision 1.26 (25 May 2019) (Work

in Progress – PUBLIC REVIEW)

o https://trustedcomputinggroup.org/specifications-public-review

o https://trustedcomputinggroup.org/resource/tcg-storage-security-subsystem-class-ruby

• TCG Storage Opal SSC Feature Set: PSID Version 1.00 Revision 1.00 (5 August 2015)

o https://trustedcomputinggroup.org/resource/tcg-storage-opal-feature-set-psid

• TCG Storage Opal SSC Feature Set: Single User Mode Version 1.00 Revision 2.00 (5 August

2015)

o https://trustedcomputinggroup.org/tcg-storage-opal-ssc-feature-set-single-user-mode

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