Copyright © 2016 MIPI Alliance, Inc.
All rights reserved.
Confidential
Specification for
I3C
SM
Improved Inter Integrated Circuit
Version 1.0 – 23 December 2016
MIPI Board Adopted 31 December 2016
* NOTE TO IMPLEMENTERS *
This document is a MIPI Specification. MIPI member companies’ rights and obligations apply to this MIPI
Specification as defined in the MIPI Membership Agreement and MIPI Bylaws.
Copyright © 2016 MIPI Alliance, Inc.
All rights reserved.
Confidential
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Copyright © 2016 MIPI Alliance, Inc.
All rights reserved.
Confidential
Specification for
I3C
SM
Improved Inter Integrated Circuit
Version 1.0
23 December 2016
MIPI Board Adopted 31 December 2016
Further technical changes to this document are expected as work continues in the Sensor Working
Group.
Specification for I3C
Version 1.0
ii
Copyright © 2016 MIPI Alliance, Inc.
All rights reserved.
Confidential
23-Dec-2016
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Version 1.0
Specification for I3C
Copyright © 2016 MIPI Alliance, Inc.
All rights reserved.
Confidential
iii
23-Dec-2016
Contents
Contents.............................................................................................................................iii
Figures.............................................................................................................................. vii
Tables...................................................................................................................................x
Release History............................................................................................................... xiii
1
Introduction.............................................................................................................. 1
1.1 Scope 2
1.2 I3C Purpose.................................................................................................................... 2
1.3 I3C Key Features............................................................................................................3
2
Terminology.............................................................................................................. 5
2.1 Use of Special Terms.......................................................................................................5
2.2 Definitions....................................................................................................................... 5
2.3 Abbreviations..................................................................................................................8
2.4 Acronyms 8
3
References............................................................................................................... 10
3.1 Normative References.................................................................................................. 10
3.2 Informative References................................................................................................10
4
Technical Overview (Informative)........................................................................ 11
4.1 I3C Fundamental Principles....................................................................................... 12
4.2 I3C Master and Slave Devices.....................................................................................15
4.2.1 I3C Master Device.....................................................................................................16
4.2.1.1
I3C Master Device Roles............................................................................................... 17
4.2.2 I3C Slave Device........................................................................................................18
4.2.2.1
I3C Slave Device Roles.................................................................................................. 19
5
I3C Protocol............................................................................................................ 20
5.1 Single Data Rate (SDR) Mode.....................................................................................20
5.1.1 Bus Configuration.....................................................................................................21
5.1.1.1
I3C Device Characteristics............................................................................................21
5.1.1.2
I3C Characteristics Registers....................................................................................... 24
5.1.1.2.1
Bus Characteristics Register (BCR)........................................................................... 25
5.1.1.2.2
Device Characteristics Register (DCR)...................................................................... 26
5.1.1.2.3
Legacy Virtual Register (LVR)...................................................................................26
5.1.2 Bus Communication..................................................................................................27
5.1.2.1
Role of I3C Slave............................................................................................................28
5.1.2.2
I3C Address Header.......................................................................................................29
5.1.2.2.1
I3C Address Arbitration..............................................................................................30
5.1.2.2.2
I3C Address Arbitration Optimization........................................................................30
5.1.2.2.3
Consequence of Master Starting a Frame with an I3CSlave Address........................31
5.1.2.2.4
Address Header Following a Repeated START is Push-Pull..................................... 32
5.1.2.2.5
I3C Slave Address Restrictions.................................................................................. 32
5.1.2.3
I3C SDR Data Words.....................................................................................................34
5.1.2.3.1
Transition from Address ACK to SDR Master Write Data.........................................34
5.1.2.3.2
Ninth Bit of SDR Master Written Data as Parity........................................................35
5.1.2.3.3
Ninth Bit of SDR Slave Returned (Read) Data as End-of-Data................................. 35
