MIPID-PHYSpecification

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MIPI Alliance Specification for D-PHY v0.90.00

* Cautions and Notes to Implementers and Reviewers *

Adopted MIPI Specification:

This document is a MIPI Specification adopted by the MIPI Board of Directors. MIPI member

companies’ rights and obligations apply to this MIPI Specification as defined in the MIPI Membership

Agreement and MIPI Bylaws.

Recommended for Implementation:

It is the good faith expectation of the MIPI PHY Working Group that D-PHY v0.90.00 is stable and

robust. The MIPI Alliance currently recommends that any member companies considering

implementation of D-PHY base their work on v0.90.00.

Past Revisions:

For avoidance of doubt, MIPI Alliance strongly recommends that member companies NOT implement

the previously adopted D-PHY v0.65, which is superseded by v0.90.00.

Future Revisions and Pending Changes:

It is the good faith expectation of the MIPI PHY WG that there will be no significant functional

changes to the fundamental technology described in this specification. Currently known areas of

discussion (as of November 2007) which may conceivably result in incremental changes are

described below. If any such changes are pursued, every reasonable effort will be made to

ensure backward compatibility of future versions and forward compatibility of this version.

• The PHY Working Group expects to gain important insight into D-PHY as silicon

implementations are completed by member companies and interoperability and/or

conformance testing begins on that silicon. If such post-silicon insight indicates that

further revision to v0.90.00 could substantially improve interoperability, ease

implementation, or aid testing, the working group MAY make further changes to the

specification.

• The MIPI Alliance is initiating a program to aid in conformance and interoperability testing

for several MIPI Specifications, including D-PHY. This program is likely to involve direct

interaction between contracted, external test organization(s) and the MIPI PHY WG and

may eventually result in test definitions and/or procedures being added to the D-PHY

Specification.

• The MIPI PHY Working Group is investigating the possibility to relax some S-parameter

specifications from section 7 of D-PHY v0.90.00, particularly those related to section 7.7

“Driver and Receiver Characteristics”. If this investigation results in a specification

modification, the changes will be backward compatible, such that they will not impact

interoperability between devices.

• The D-PHY Specification requires that powered-up Lanes be initialized simultaneously,

but some corresponding protocol specifications may not mention this. The D-PHY

specification will continue to describe this requirement until all corresponding protocol

specifications are updated.

• Throughout the document, the upper-case/lower-case distinction between the terms

‘events’/ ’Events’ is inconsistent, particularly in the context of Lane type descriptors but

also in the remaining specification text. A future specification revision is likely to include

changes which define this term and ensure it is used consistently in the specification.

Version 0.90.00 8-Oct-2007 MIPI Alliance Specification for D-PHY

MIPI Alliance Member Confidential.

NOTICE OF DISCLAIMER 1

The material contained herein is not a license, either expressly or impliedly, to any IPR owned or 2

controlled by any of the authors or developers of this material or MIPI. The material contained herein is 3

provided on an “AS IS” basis and to the maximum extent permitted by applicable law, this material is 4

provided AS IS AND WITH ALL FAULTS, and the authors and developers of this material and MIPI 5

hereby disclaim all other warranties and conditions, either express, implied or statutory, including, but not 6

limited to, any (if any) implied warranties, duties or conditions of merchantability, of fitness for a 7

particular purpose, of accuracy or completeness of responses, of results, of workmanlike effort, of lack of 8

viruses, and of lack of negligence. 9

ALSO, THERE IS NO WARRANTY OF CONDITION OF TITLE, QUIET ENJOYMENT, QUIET 10

POSSESSION, CORRESPONDENCE TO DESCRIPTION OR NON-INFRINGEMENT WITH 11

REGARD TO THIS MATERIAL OR THE CONTENTS OF THIS DOCUMENT. IN NO EVENT WILL 12

ANY AUTHOR OR DEVELOPER OF THIS MATERIAL OR THE CONTENTS OF THIS DOCUMENT 13

OR MIPI BE LIABLE TO ANY OTHER PARTY FOR THE COST OF PROCURING SUBSTITUTE 14

GOODS OR SERVICES, LOST PROFITS, LOSS OF USE, LOSS OF DATA, OR ANY INCIDENTAL, 15

CONSEQUENTIAL, DIRECT, INDIRECT, OR SPECIAL DAMAGES WHETHER UNDER 16

CONTRACT, TORT, WARRANTY, OR OTHERWISE, ARISING IN ANY WAY OUT OF THIS OR 17

ANY OTHER AGREEMENT, SPECIFICATION OR DOCUMENT RELATING TO THIS MATERIAL, 18

WHETHER OR NOT SUCH PARTY HAD ADVANCE NOTICE OF THE POSSIBILITY OF SUCH 19

DAMAGES. 20

Without limiting the generality of this Disclaimer stated above, the user of the contents of this Document is 21

further notified that MIPI: (a) does not evaluate, test or verify the accuracy, soundness or credibility of the 22

contents of this Document; (b) does not monitor or enforce compliance with the contents of this Document; 23

and (c) does not certify, test, or in any manner investigate products or services or any claims of compliance 24

with the contents of this Document. The use or implementation of the contents of this Document may 25

involve or require the use of intellectual property rights ("IPR") including (but not limited to) patents, 26

patent applications, or copyrights owned by one or more parties, whether or not Members of MIPI. MIPI 27

does not make any search or investigation for IPR, nor does MIPI require or request the disclosure of any 28

IPR or claims of IPR as respects the contents of this Document or otherwise. 29

Questions pertaining to this document, or the terms or conditions of its provision, should be addressed to: 30

MIPI Alliance, Inc. 31

c/o IEEE-ISTO 32

445 Hoes Lane 33

Piscataway, NJ 08854 34

Attn: Board Secretary 35

Version 0.90.00 8-Oct-2007 MIPI Alliance Specification for D-PHY

MIPI Alliance Member Confidential.

iii

Contents 37

Version 0.90.00 – 8 October 2007 ................................................................................................................... i

38

 Overview ............................................................................................................................................... 1439

1.1

 Scope ............................................................................................................................................. 1440

1.2

 Purpose .......................................................................................................................................... 1541

 Terminology .......................................................................................................................................... 1642

2.1

 Definitions ..................................................................................................................................... 1643

2.2

 Abbreviations ................................................................................................................................ 1744

2.3

 Acronyms ...................................................................................................................................... 1745

 D-PHY Introduction .............................................................................................................................. 2046

3.1

 Summary of PHY Functionality .................................................................................................... 2047

3.2

 Mandatory Functionality ............................................................................................................... 2048

 Architecture ........................................................................................................................................... 2149

4.1

 Lane Modules ................................................................................................................................ 2150

4.2

 Master and Slave ........................................................................................................................... 2251

4.3

 High Frequency Clock Generation ................................................................................................ 2252

4.4

 Clock Lane, Data Lanes and the PHY-Protocol Interface ............................................................. 2253

4.5

 Selectable Lane Options ................................................................................................................ 2354

4.6

 Lane Module Types ....................................................................................................................... 2555

4.6.1

 Unidirectional Data Lane ....................................................................................................... 2656

4.6.2

 Bi-directional Data Lanes ...................................................................................................... 2657

4.6.3

 Clock Lane ............................................................................................................................. 2758

4.7

 Configurations ............................................................................................................................... 2759

4.7.1

 Unidirectional Configurations ............................................................................................... 2960

4.7.2

 Bi-Directional Half-Duplex Configurations .......................................................................... 3161

4.7.3

 Mixed Data Lane Configurations .......................................................................................... 3262

 Global Operation ................................................................................................................................... 3363