mipi_csi-2_specification_v1.2_csi-2v1.2

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Specification for

Camera Serial Interface 2 (CSI-2)

Version 1.2

22 January 201

MIPI Board Adopted 10 September

2014

This document is subject to further editorial and

technical development.

Confidential

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MIPI Alliance, Inc.

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Attn: Board Secretary

Confidential

Version 1.2 MIPI Alliance Specification for CSI-2

22 Jan-2014

Contents 2

Contents ......................................................................................................................................................... iii

Tables ........................................................................................................................................................... xii

Release History ............................................................................................................................................ xiii

Overview ................................................................................................................................................. 1 6

1.1

Scope ............................................................................................................................................... 1 7

1.2

Purpose ............................................................................................................................................ 1 8

Terminology ............................................................................................................................................ 2 9

2.1

Definitions ....................................................................................................................................... 2 10

2.2

Abbreviations .................................................................................................................................. 2 11

2.3

Acronyms ........................................................................................................................................ 3 12

References ............................................................................................................................................... 5 13

Overview of CSI-2 .................................................................................................................................. 6 14

CSI-2 Layer Definitions .......................................................................................................................... 7 15

Camera Control Interface (CCI) .............................................................................................................. 9 16

6.1

Data Transfer Protocol .................................................................................................................... 9 17

6.1.1

Message Type .......................................................................................................................... 9 18

6.1.2

Read/Write Operations .......................................................................................................... 10 19

6.2

CCI Slave Addresses ..................................................................................................................... 13 20

6.3

CCI Multi-Byte Registers .............................................................................................................. 13 21

6.3.1

Overview ............................................................................................................................... 13 22

6.3.2

The Transmission Byte Order for Multi-byte Register Values .............................................. 15 23

6.3.3

Multi-Byte Register Protocol ................................................................................................. 16 24

6.4

Electrical Specifications and Timing for I/O Stages ..................................................................... 20 25

Physical Layer ....................................................................................................................................... 23 26

Multi-Lane Distribution and Merging ................................................................................................... 24 27

8.1

Multi-Lane Interoperability ........................................................................................................... 29 28

Low Level Protocol ............................................................................................................................... 32 29

9.1

Low Level Protocol Packet Format ............................................................................................... 32 30

9.1.1

Low Level Protocol Long Packet Format .............................................................................. 32 31

9.1.2

Low Level Protocol Short Packet Format .............................................................................. 34 32

9.2

Data Identifier (DI) ........................................................................................................................ 34 33

9.3

Virtual Channel Identifier .............................................................................................................. 34 34

9.4

Data Type (DT) ............................................................................................................................. 35 35

9.5

Packet Header Error Correction Code ........................................................................................... 36 36

9.5.1

General Hamming Code Applied to Packet Header .............................................................. 37 37

Confidential

iii

Version 1.2 MIPI Alliance Specification for CSI-2

22 Jan-2014

9.5.2

Hamming-Modified Code ...................................................................................................... 37 38

9.5.3

ECC Generation on TX Side ................................................................................................. 40 39

9.5.4

Applying ECC on RX Side .................................................................................................... 41 40

9.6

Checksum Generation ................................................................................................................... 42 41

9.7

Packet Spacing .............................................................................................................................. 44 42

9.8

Synchronization Short Packet Data Type Codes ........................................................................... 45 43

9.8.1

Frame Synchronization Packets ............................................................................................. 45 44

9.8.2

Line Synchronization Packets ................................................................................................ 46 45

9.9

Generic Short Packet Data Type Codes......................................................................................... 46 46

9.10

Packet Spacing Examples .............................................................................................................. 47 47

9.11

Packet Data Payload Size Rules .................................................................................................... 49 48

9.12

Frame Format Examples ................................................................................................................ 50 49

9.13

Data Interleaving ........................................................................................................................... 52 50

9.13.1

Data Type Interleaving .......................................................................................................... 52 51

9.13.2

Virtual Channel Identifier Interleaving .................................................................................. 55 52

Color Spaces ...................................................................................................................................... 57 53

10.1

RGB Color Space Definition ......................................................................................................... 57 54

10.2

YUV Color Space Definition ........................................................................................................ 57 55

Data Formats ..................................................................................................................................... 58 56

11.1

Generic 8-bit Long Packet Data Types .......................................................................................... 59 57

11.1.1

Null and Blanking Data ......................................................................................................... 59 58

11.1.2

Embedded Information .......................................................................................................... 59 59

11.2

YUV Image Data ........................................................................................................................... 60 60

11.2.1 Legacy YUV420 8-bit ........................................................................................................... 61 61

11.2.2

YUV420 8-bit ........................................................................................................................ 63 62

11.2.3

YUV420 10-bit ...................................................................................................................... 65 63

11.2.4

YUV422 8-bit ........................................................................................................................ 67 64

11.2.5

YUV422 10-bit ...................................................................................................................... 69 65

11.3

RGB Image Data ........................................................................................................................... 70 66

11.3.1

RGB888 ................................................................................................................................. 71 67

11.3.2

RGB666 ................................................................................................................................. 72 68

11.3.3

RGB565 ................................................................................................................................. 73 69

11.3.4

RGB555 ................................................................................................................................. 74 70

11.3.5

RGB444 ................................................................................................................................. 75 71

11.4

RAW Image Data .......................................................................................................................... 75 72

11.4.1

RAW6 .................................................................................................................................... 76 73

11.4.2

RAW7 .................................................................................................................................... 77 74

Confidential

Version 1.2 MIPI Alliance Specification for CSI-2

22 Jan-2014

11.4.3

RAW8 .................................................................................................................................... 78 75

11.4.4

RAW10 .................................................................................................................................. 79 76

11.4.5

RAW12 .................................................................................................................................. 80 77

11.4.6

RAW14 .................................................................................................................................. 81 78

11.5

User Defined Data Formats ........................................................................................................... 82 79

Recommended Memory Storage ....................................................................................................... 84 80

12.1

General/Arbitrary Data Reception ................................................................................................. 84 81

12.2

RGB888 Data Reception ............................................................................................................... 85 82

12.3

RGB666 Data Reception ............................................................................................................... 85 83

12.4

RGB565 Data Reception ............................................................................................................... 86 84

12.5

RGB555 Data Reception ............................................................................................................... 86 85

12.6

RGB444 Data Reception ............................................................................................................... 87 86

12.7

YUV422 8-bit Data Reception ...................................................................................................... 87 87

12.8

YUV422 10-bit Data Reception .................................................................................................... 88 88

12.9

YUV420 8-bit (Legacy) Data Reception ....................................................................................... 88 89

12.10

YUV420 8-bit Data Reception .................................................................................................. 90 90

12.11

YUV420 10-bit Data Reception ................................................................................................ 91 91

12.12

RAW6 Data Reception .............................................................................................................. 92 92

12.13

RAW7 Data Reception .............................................................................................................. 92 93

12.14

RAW8 Data Reception .............................................................................................................. 93 94

12.15

RAW10 Data Reception ............................................................................................................ 93 95

12.16

RAW12 Data Reception ............................................................................................................ 94 96

12.17 RAW14 Data Reception ............................................................................................................ 94 97

Annex A

JPEG8 Data Format (informative) ............................................................................................. 95 98

A.1

Introduction ................................................................................................................................... 95 99

A.2

JPEG Data Definition .................................................................................................................... 96 100

A.3

Image Status Information .............................................................................................................. 97 101

A.4

Embedded Images ......................................................................................................................... 98 102

A.5

JPEG8 Non-standard Markers ....................................................................................................... 99 103

A.6

JPEG8 Data Reception ................................................................................................................ 100 104

Annex B

CSI-2 Implementation Example (informative) ........................................................................ 101 105

B.1

Overview ..................................................................................................................................... 101 106

B.2

CSI-2 Transmitter Detailed Block Diagram ................................................................................ 101 107

B.3

CSI-2 Receiver Detailed Block Diagram .................................................................................... 102 108

B.4

Details on the D-PHY implementation ........................................................................................ 103 109

B.4.1

CSI-2 Clock Lane Transmitter ............................................................................................. 105 110

B.4.2

CSI-2 Clock Lane Receiver ................................................................................................. 106 111

Confidential