OV5670 Camera Module Application Notes
Table of Contents
Related Documents...............................................................................................................................4
1. Overview of OV5670 Applications..................................................................................................5
2. Hardware Design of OV5670 Camera Module................................................................................6
2.1 Fixed Focus Camera Module with 2 lane MIPI Interface.........................................................6
2.1.1 Description of Camera Interface........................................................................................6
2.1.2 PCB/FPCB Layout Guide..................................................................................................7
2.2 Auto Focus Camera Module with 2 lane MIPI Interface...........................................................8
2.2.1 Description of Camera Interface........................................................................................8
2.2.2 PCB/FPCB Layout Guide..................................................................................................9
2.3 Deal with Lens.........................................................................................................................10
2.3.1 Light fall off.....................................................................................................................10
2.3.2 F# of Lens........................................................................................................................10
2.3.3 Focus Accuracy at infinite...............................................................................................10
2.3.4 Optical contrast................................................................................................................10
2.4 Calibration of Camera Module................................................................................................10
2.4.1 White Balance Calibration...............................................................................................10
2.4.2 VCM setting Calibration..................................................................................................10
2.5 Test of OV5670 Camera Module.............................................................................................11
2.5.1 Resolution Test................................................................................................................11
2.5.2 Focus Test........................................................................................................................11
2.5.3 Shading Test.....................................................................................................................11
2.5.4 Blemish Test....................................................................................................................11
3. Hardware Design with OV5670 Camera........................................................................................12
3.1 Host Interface...........................................................................................................................12
3.1.1 Power Supplies.................................................................................................................12
3.1.2 Clock................................................................................................................................17
3.1.3 Control Signals.................................................................................................................17
3.1.4 Image Data Signals..........................................................................................................17
3.1.5 PCB layout Guide of Host...............................................................................................17
3.2 Mechanical Design..................................................................................................................18
3.2.1 Lens Cover.......................................................................................................................18
3.2.2 Block Wide Angle Light..................................................................................................18
3.2.3 Keep Camera Module Cool..............................................................................................18
4. Hardware Operation of OV5670 Camera Module.........................................................................20
4.1 Controlled with PWDNB.........................................................................................................20
4.1.1. System Power On............................................................................................................20
4.1.2 Enter Camera....................................................................................................................20
4.1.3 Switch to Other Camera...................................................................................................21
4.1.4 Switch from Other Camera..............................................................................................22
4.1.5 Exit Camera......................................................................................................................23
4.1.6 System Power Off............................................................................................................24
4.2 Controlled with Xshutdown.....................................................................................................25
4.2.1 System Power On.............................................................................................................25
4.2.2 Enter Camera....................................................................................................................25
4.2.3 Switch to Other Camera...................................................................................................26
4.2.4 Switch from Other Camera..............................................................................................26
4.2.5 Exit Camera......................................................................................................................27
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