Datasheet
Table Of Contents
- applications
- features
- key specifications
- table of contents
- list of figures
- list of tables
- 1 signal descriptions
- 2 system level description
- 3 block level description
- 4 image sensor core digital functions
- 4.1 mirror and flip
- 4.2 image windowing
- 4.3 test pattern
- 4.4 50/60Hz detection
- 4.5 AEC and AGC algorithms
- 4.6 AEC/AGC steps
- 4.7 black level calibration (BLC)
- 4.8 strobe flash and frame exposure
- 4.9 xenon flash control
- 4.10 frame exposure (FREX) mode
- 4.11 FREX strobe flash control
- 4.12 one-time programmable (OTP) memory
- 5 image sensor processor digital functions
- 6 image sensor output interface digital functions
- 7 register tables
- table 7-1 system control registers (sheet 1 of 5)
- table 7-2 SCCB registers (sheet 1 of 2)
- table 7-3 group hold control registers
- table 7-4 AEC/AGC 1 registers
- table 7-5 system timing registers (sheet 1 of 3)
- table 7-6 AEC/AGC 2 registers (sheet 1 of 3)
- table 7-7 STROBE/frame exposure control registers (sheet 1 of 2)
- table 7-8 50/60 HZ DETECTION registers
- table 7-9 OTP control registers (sheet 1 of 2)
- table 7-10 BLC registers (sheet 1 of 3)
- table 7-11 frame control registers
- table 7-12 DVP registers (sheet 1 of 2)
- table 7-13 MIPI top registers (sheet 1 of 11)
- table 7-14 ISPFC registers
- table 7-15 ISP TOP control registers (sheet 1 of 6)
- table 7-16 AWB registers (sheet 1 of 3)
- table 7-17 average registers (sheet 1 of 2)
- table 7-18 DPC registers
- table 7-19 LENC registers (sheet 1 of 4)
- table 7-20 cluster DPC registers (sheet 1 of 2)
- table 7-21 windows registers
- table 7-22 AEC/AGC 3 registers
- 8 operating specifications
- 9 mechanical specifications
- 10 optical specifications
- revision history
Confidential for truly Only
11.03.2009 PRELIMINARY SPECIFICATION proprietary to OmniVision Technologies
4-13
4.7 black level calibration (BLC)
The pixel array contains several optically shielded (black) lines. These lines are used as reference for black level
calibration. There are three main functions of the BLC:
• adjusting all normal pixel values based on the values of the black levels
• applying multiplication to all pixel values based on digital gain
table 4-8 BLC control functions
address
register name
default
value
R/W
description
0x4000 BLC CTRL00 0x89 RW
BLC Control
(0: disable, 1: enable)
Bit[7]: blc_median_filter_enable
Bit[3]: adc_11bit_mode
Bit[2]: apply2blackline
Bit[1]: blackline_averageframe
Bit[0]: BLC enable
0x4002 BLC CTRL02 0x45 RW
Bit[7]: format_change_en
format_change_i from fmt will be
effect when it is enable
Bit[6]: blc_auto_en
Bit[5:0]: reset_frame_num
0x4005 BLC CTRL05 0x18 RW
Bit[5]: one_line_mode
Bit[4]: remove_none_imagedata
Bit[3]: blc_man_1_en
Bit[2]: blackline_bggr_man_en
0: bgbg/grgr is decided by
rblue/hswap
1: bgbg/grgr fix;
Bit[1]: bgbg/grgr is decided by
rblue/hswap
blc_always_up_en
0: Normal freeze
1: BLC always update
0x4009 BLACK LEVEL 0x10 RW Bit[7:0]: blc_blackleveltarget0