mt9v112 Micron Semiconductor Products, mt9v112 Datasheet - Page 28

• Manufacturer Part Number: mt9v112
• Description: 1/6-inch Soc Vga Cmos Digital Image Sensor
• Manufacturer: Micron Semiconductor Products

T able 10: Camera Control Register Description
09005aef8154a39d/09005aef8175e6cc
MT9V112_2.fm- Rev. A 1/05 EN
R38:2—0x226 – Auto Exposure Horizontal Window Boundaries (R/W)
Default
Description
Bits 15:8
Bits 7:0
R39:2—0x227 – Auto Exposure Vertical Window Boundaries (R/W)
Default
Description
Bits 15:8
Bits 7:0
R43:2—0x22B – Auto Exposure Horizontal Center Window Boundaries (R/W)
Default
Description
Bits 15:8
Bits 7:0
R44:2—0x22C – Auto Exposure Vertical Center Window Boundaries (R/W)
Default
Description
Bits 15:8
Bits 7:0
R45:2—0x22D – AWB Window Boundaries (R/W)
Default
Description
Bits 15:12
Bits 11:8
Bits 7:4
Bits 3:0
R46:2—0x22E – Auto Exposure T arget and Precision Control (R/W)
Default
Description
Bits 15:8
0x8000
This register specifies the left and right boundaries of the window used by the auto exposure measurement
engine. The values programmed in the registers are the fractional percentage, where 128 (decimal) is the
right-most edge of the frame, 64 (decimal) is the middle of the frame, and 0 is the left-most edge of the
frame.
Right window boundary.
Left window boundary.
0x8008
This register specifies the top and bottom boundaries of the window used by the auto exposure
measurement engine. The values programmed in the registers are the fractional percentage, where 128
(decimal) is the bottom edge of the frame, 64 (decimal) is the middle of the frame, and 0 is the top edge of
the frame.
Bottom window boundary.
Top window boundary.
0x6020
This register specifies the left and right boundaries of the window used by the auto exposure measurement
engine in back light compensation mode. The values programmed in the registers are the fractional
percentage, where 128 (decimal) is the right-most edge of the frame, 64 (decimal) is the middle of the
frame, and 0 is the left-most edge of the frame.
Right window boundary.
Left window boundary.
0x6020
This register specifies the top and bottom boundaries of the window used by the auto exposure
measurement engine in back light compensation mode. The values programmed in the registers are the
fractional percentage, where 128 (decimal) is the bottom edge of the frame, 64 (decimal) is the middle of
the frame, and “0” is the top edge of the frame.
Bottom window boundary.
Top window boundary.
0xF0A0
This register specifies the boundaries of the window used by the AWB measurement engine. Essentially, it
describes the AWB measurement window in terms relative to the size of the image—horizontally, in units of
1/10ths of the width of the image; vertically, in units of 1/16 of the height of the image. So although the
positioning is highly quantized, the window remains roughly in place as the resolution changes.
Bottom window boundary (in units of blocks).
Top window boundary (in units of blocks).
Right window boundary (in units of 2 blocks).
Left window boundary (in units of 2 blocks).
0x0C4A
This register specifies the luma target of the auto exposure algorithm and the size of the window/range
around the target in which no auto exposure adjustment is made. This window is centered on target, but
the value programmed in the register is 1/2 of the window size.
Half-size of the auto exposure stability window/range.
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SOC VGA DIGITAL IMAGE SENSOR
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PRELIMINARY
MT9V112