ov7620 OmniVision Technologies, Inc, ov7620 Datasheet - Page 28
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ov7620
Manufacturer Part Number
ov7620
Description
Single-chip Cmos Vga Color Digital Camera
Manufacturer
OmniVision Technologies, Inc
Datasheet
1.OV7620.pdf
(58 pages)
- Current page: 28 of 58
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OV7620/OV7120 Product Specifications - Rev. 1.2 (7/10/01)
Register 01 - rw: Blue gain control
Register 02 - rw: Red gain control
Register 03 - rw: Saturation control
Register 04 & 05 - w: Reserved Register
Register 06 - rw: Brightness control
Bits
Default
Bits
Default
Bits
Default
Default
Bits
BLU<6:0> - white balance value for the blue channel.
BLU<7> - Sign bit. If “1”, Blue gain increase; “0” gain decrease.
RED<6:0> - white balance value for the red channel.
RED<7> - Sign bit. If “1”, Red channel gain increase; “0” gain decrease.
SAT<7:0> - saturation adjustment for the UV channel based on the default setting;
This register is reserved for internal test use. Write data to this register will be no function.
BRT<7:0> - brightness adjustment for the Y/RGB channel based on the default setting;
RED7
BRT7
BLU7
SAT7
1
1
1
1
The formula is:
Blue_gain=1+(BLU<7:0> - [80])/[100]; range (0.5x ~ 1.5x).
The formula is:
Red_gain=1+(RED<7:0> - [80])/[100]; range (0.5x ~ 1.5x).
range (-4dB ~ +6dB). If SAT<7:0> > [80], increase; if SAT<7:0> < [80], decrease.
range (-200mv ~ +200mv). If BRT<7:0> > [80], brightness increase; If BRT<7:0> < [80], bright-
ness decrease. This register is auto/manual controllable. If register 2D bit 4=1, this register is
controlled by chip automatically, if write value to this register, this value will be updated by
internal circuit. Only when register 2D bit 4=0, this register can be set to any value
RED6
BLU6
BRT6
SAT6
0
0
0
0
RED5
BRT5
BLU5
SAT5
-0
0
0
0
RED4
BRT4
BLU4
SAT4
0
0
0
0
Preliminary
RED3
BLU3
BRT3
SAT3
0
0
0
0
RED2
BLU2
BRT2
SAT2
0
0
0
0
Company Confidential
OMNIVISION TECHNOLOGIES INC.
RED1
BLU1
SAT1
BRT1
0
0
0
0
RED0
BLU0
BRT0
SAT0
0
0
0
0
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