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OV426_BGA_DS_2.11_OVT.pdf
applications
features
key specifications
table of contents
list of figures
list of tables
1 signal descriptions
figure 1-1 pin diagram
table 1-1 signal descriptions (sheet 1 of 3)
table 1-2 pad symbol and equivalent circuit (sheet 1 of 2)
2 system level description
2.1 overview
figure 2-1 OV426 medical system block diagram
2.2 functional block description
2.2.1 camera interface
2.2.2 reset
2.2.3 black level calibration
2.2.4 AEC/AGC
2.2.5 SCCB slave interface
2.2.6 SCCB master interface
2.2.7 phase-locked loop (PLL)
figure 2-2 OV426 functional block diagram
figure 2-3 OV426 reference schematic
figure 2-4 OV426 160Kpixel (400 x 400) diagram
2.3 SCCB interface
2.3.1 SCCB timing
figure 2-5 SCCB interface timing
table 2-1 SCCB interface timing specifications
2.3.2 direct access mode
figure 2-6 message type
figure 2-7 SCCB single read from random location
figure 2-8 SCCB single read from current location
figure 2-9 SCCB sequential read from random location
figure 2-10 SCCB sequential read from current location
figure 2-11 SCCB single write to random location
figure 2-12 SCCB sequential write to random location
2.4 PLL control
figure 2-13 PLL control diagram
table 2-2 PLL control registers
2.5 image processor
figure 2-14 image processor block diagram
2.6 power up sequence
table 2-3 power up sequence timing constraints
figure 2-15 power up sequence
3 image sensor core digital functions
3.1 AEC and AGC algorithms
table 3-1 AEC/AGC control function registers
3.1.1 average-based algorithm
figure 3-1 AEC/AGC auto speed (step) mode diagram
figure 3-2 AEC/AGC manual speed (step) mode diagram
table 3-2 average based control function registers (sheet 1 of 2)
3.1.2 average luminance (YAVG)
figure 3-3 average-based window definition
table 3-3 average luminance control function registers (sheet 1 of 2)
3.2 AEC/AGC steps
3.2.1 auto exposure control (AEC)
3.2.2 manual exposure control
3.2.3 auto gain control (AGC)
3.2.4 manual gain control
3.2.5 integration time between 1~16 rows
3.2.6 gain insertion between AEC banding steps
3.2.7 gain insertion between night mode steps
3.2.8 when AEC reaches maximum
4 image sensor processor digital functions
4.1 ISP general controls
table 4-1 ISP general control registers
4.2 white balance (WB)
table 4-2 WB control registers
5 image sensor output interface digital functions
5.1 system control
table 5-1 system control registers (sheet 1 of 3)
5.2 frame control (FC)
table 5-2 frame control registers
5.3 digital video port (DVP)
table 5-3 DVP registers
5.3.1 DVP timing
figure 5-1 DVP timing diagram
table 5-4 DVP timing specifications for OV6946
table 5-5 DVP timing specifications for OV6948
figure 5-2 DVP setup/hold time diagram
table 5-6 DVP setup/hold time
6 register tables
6.1 system control [0x0100, 0x0103, 0x3000 ~ 0x3011, 0x3020 ~ 0x302A]
table 6-1 system control registers (sheet 1 of 3)
6.2 SCCB control [0x3100 ~ 0x3103]
table 6-2 SCCB control registers
6.3 SPI control [0x3200 ~ 0x3209]
table 6-3 SPI registers
6.4 ADC_sync [0x3700 ~ 0x370D, 0x3710 ~ 0x3716]
table 6-4 ADC_sync registers (sheet 1 of 2)
6.5 BLC [0x4000 ~ 0x4013, 0x402C ~ 0x4033, 0x4050 ~ 0x4052, 0x4060 ~ 0x406C]
table 6-5 BLC control registers (sheet 1 of 4)
6.6 frame control [0x4200 ~ 0x4203]
table 6-6 frame control registers
6.7 DVP control [0x4700 ~ 0x470C]
table 6-7 DVP registers (sheet 1 of 2)
6.8 ISP top [0x5000 ~ 0x500A]
table 6-8 ISP top registers (sheet 1 of 2)
6.9 white balance [0x5186 ~ 0x518B]
table 6-9 WB control registers
6.10 average control [0x5680 ~ 0x5691, 0x5693]
table 6-10 average registers (sheet 1 of 2)
6.11 window control [0x5980 ~ 0x5988]
table 6-11 window registers
6.12 AEC/AGC [0x3500 ~ 0x350D, 0x3A00 ~ 0x3A05, 0x3A08 ~ 0x3A21, 0x5A00 ~ 0x5A41]
table 6-12 AEC/AGC registers (sheet 1 of 4)
7 operating specifications
7.1 absolute maximum ratings
table 7-1 absolute maximum ratings
7.2 functional temperature
table 7-2 functional temperature
7.3 DC characteristics
table 7-3 DC characteristics
8 mechanical specifications
8.1 physical specifications
figure 8-1 package specifications
table 8-1 package dimensions (sheet 1 of 2)
8.2 IR reflow profile
figure 8-2 IR reflow profile suggestion (lead free solder)
table 8-2 reflow conditions
revision history
datasheet
PRODUCT SPECIFICATION
camera bridge processor
6
2
4
V
O
OV426
camera bridge processor
00Copyright © 2019 OmniVision Technologies, Inc. All rights reserved.
This document is provided “as is” with no warranties whatsoever, including any warranty of merchantability,
non-infringement, fitness for any particular purpose, or any warranty otherwise arising out of any proposal, specification,
or sample.
OmniVision Technologies, Inc. and all its affiliates disclaim all liability, including liability for infringement of any proprietary
rights, relating to the use of information in this document. No license, expressed or implied, by estoppel or otherwise, to
any intellectual property rights is granted herein.
The information contained in this document is considered proprietary to OmniVision Technologies, Inc. and all its
affiliates. This information may be distributed to individuals or organizations authorized by OmniVision Technologies, Inc.
to receive said information. Individuals and/or organizations are not allowed to re-distribute said information.
Trademark Information
All other trademarks used herein are the property of their respective owners.
OmniVision and the OmniVision logo are registered trademarks of OmniVision Technologies, Inc.
camera bridge processor
datasheet (BGA)
PRODUCT SPECIFICATION
version 2.11
february 2019
To learn more about OmniVision Technologies, visit www.ovt.com.
i
00applications
endoscopes
wearables
00features
complete imaging front-end solution
400 x 400 at 30 fps
support for the following ISP functions: ADC, BLC,
AEC/AGC, and MWB
analog input
support for SCCB control,10-bit DVP data output,
and SPI master
ordering information
OV00426-B64G (lead-free)
64-pin BGA
external system clock or independent crystal; internal
low voltage operation
6 x 6 mm to fit into handle or at back-end, near ISP in
medical endoscope and other video devices
flexible input clock
PLL
temperature range: -30°C to 70°C
package dimensions: 6 mm x 6 mm
00key specifications
power supply:
core: 1.5V
I/O: 3.3V
analog: 3.3V
02.07.2019
PRODUCT SPECIFICATION
proprietary to OmniVision Technologies
OV426
camera bridge processor
proprietary to OmniVision Technologies
PRODUCT SPECIFICATION
version 2.11
00table of contents
iii
2.3 SCCB interface
1 signal descriptions
2 system level description
2.1 overview
2.2 functional block description
2.3.1 SCCB timing
2.3.2 direct access mode
2.2.1 camera interface
2.2.2 reset
2.2.3 black level calibration
2.2.4 AEC/AGC
2.2.5 SCCB slave interface
2.2.6 SCCB master interface
2.2.7 phase-locked loop (PLL)
3.1.1 average-based algorithm
3.1.2 average luminance (YAVG)
3.2.1 auto exposure control (AEC)
3.2.2 manual exposure control
3.2.3 auto gain control (AGC)
3.2.4 manual gain control
3.2.5 integration time between 1~16 rows
3.2.6 gain insertion between AEC banding steps
3.2.7 gain insertion between night mode steps
3.2.8 when AEC reaches maximum
4 image sensor processor digital functions
1-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-1
2-2
2-5
2-5
2-6
2-9
2-10
2-10
3-1
3-1
3-2
3-4
3-6
3-6
3-6
3-6
3-6
3-6
3-7
3-7
3-7
4-1
4-1
4-2
2.4 PLL control
2.5 image processor
2.6 power up sequence
3 image sensor core digital functions
3.1 AEC and AGC algorithms
3.2 AEC/AGC steps
4.1 ISP general controls
4.2 white balance (WB)
02.07.2019
PRODUCT SPECIFICATION
proprietary to OmniVision Technologies
OV426
camera bridge processor
5 image sensor output interface digital functions
5.1 system control
5.2 frame control (FC)
5.3 digital video port (DVP)
5.3.1 DVP timing
5-1
5-1
5-3
5-4
5-5
6-1
6-1
6.1 system control [0x0100, 0x0103, 0x3000 ~ 0x3011, 0x3020 ~ 0x302A]
6-4
6.2 SCCB control [0x3100 ~ 0x3103]
6-5
6.3 SPI control [0x3200 ~ 0x3209]
6-6
6.4 ADC_sync [0x3700 ~ 0x370D, 0x3710 ~ 0x3716]
6-7
6.5 BLC [0x4000 ~ 0x4013, 0x402C ~ 0x4033, 0x4050 ~ 0x4052, 0x4060 ~ 0x406C]
6-10
6.6 frame control [0x4200 ~ 0x4203]
6-11
6.7 DVP control [0x4700 ~ 0x470C]
6-12
6.8 ISP top [0x5000 ~ 0x500A]
6-13
6.9 white balance [0x5186 ~ 0x518B]
6-13
6.10 average control [0x5680 ~ 0x5691, 0x5693]
6.11 window control [0x5980 ~ 0x5988]
6-15
6.12 AEC/AGC [0x3500 ~ 0x350D, 0x3A00 ~ 0x3A05, 0x3A08 ~ 0x3A21, 0x5A00 ~ 0x5A41] 6-16
7-1
7-1
7-1
7-2
8-1
8-1
8-3
7.1 absolute maximum ratings
7.2 functional temperature
7.3 DC characteristics
6 register tables
7 operating specifications
8 mechanical specifications
8.1 physical specifications
8.2 IR reflow profile
proprietary to OmniVision Technologies
PRODUCT SPECIFICATION
version 2.11
00list of figures
v
figure 1-1
pin diagram
figure 2-1
OV426 medical system block diagram
figure 2-2
OV426 functional block diagram
figure 2-3
OV426 reference schematic
figure 2-4
OV426 160Kpixel (400 x 400) diagram
figure 2-5
SCCB interface timing
figure 2-6
message type
figure 2-7
SCCB single read from random location
figure 2-8
SCCB single read from current location
figure 2-9
SCCB sequential read from random location
figure 2-10 SCCB sequential read from current location
figure 2-11 SCCB single write to random location
figure 2-12 SCCB sequential write to random location
figure 2-13 PLL control diagram
figure 2-14 image processor block diagram
figure 2-15 power up sequence
figure 3-1
figure 3-2
figure 3-3
figure 5-1
figure 5-2
figure 8-1
figure 8-2
1-1
2-1
2-2
2-3
2-4
2-5
2-6
2-6
2-7
2-7
2-8
2-8
2-8
2-9
2-10
2-11
3-2
3-3
3-4
5-5
5-6
8-1
8-3
AEC/AGC auto speed (step) mode diagram
AEC/AGC manual speed (step) mode diagram
average-based window definition
DVP timing diagram
DVP setup/hold time diagram
package specifications
IR reflow profile suggestion (lead free solder)
02.07.2019
PRODUCT SPECIFICATION
proprietary to OmniVision Technologies
OV426
camera bridge processor
proprietary to OmniVision Technologies
PRODUCT SPECIFICATION
version 2.11
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