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ICM205B Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers

Part No. ICM205B
Description  VGA/QVGA CMOS image sensor with digital YUV output
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Maker  ETC1 [List of Unclassifed Manufacturers]
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ICM205B Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers

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ICM205B: VGA CMOS sensor with digital YUV output
Data Sheet V1.3, Oct. 2002
©2000, 2001, 2002 IC Media Corporation & IC Media Technology Corp.
10/16/2002
web site: http://www.ic-media.com/
web site: http://www.ic-media.com.tw/
page 9
9
Auto White Balancing
Due to the different transparency and the overlapping spectrum response of the R, G, and B filters, the
interpolated color may not be balanced. The Auto White Balancing performs the White Balance function
automatically . The following register are used to control the AWB function:
0x33 (AD_AWB_CTRL, Default = 3)
0 : Disable AWB
1 : Enable AWB with R,G,B range limited
3 : Enable AWB with no range limited
0x34 (AD_AWB_OVERFLOW, Default = 255)
Set the overflow value of the sampling pixel, if the sampling data is larger than
AD_AWB_OVERFLOW, then it will not be used for AWB processing. The default value 255 means
there is no limit on sampling data.
0x35 (AD_AWB_BRIGHT, Default = 0)
Set the minimum bright value of the sampling pixel, if the sampling data is less than
AD_AWB_BRIGHT, then it will not be used for AWB processing. The default value 0 means there is
no limit on sampling data.
When AWB function is disabled, the following registers are used to adjust the White Balance manually:
0x37 (AD_WB_RED, Default = 0x80 )
Set the RED Gain manually.
0x38 (AD_WB_GREEN, Default = 0x80)
Set the GREEN Gain manually.
0x39 (AD_WB_BLUE, Default = 0x80)
Set the BLUE Gain manually.
Sharpening
The following register are used to control the Sharpening function:
0x30 (AD_SHARP_CTRL, Default =9)
0 : Disable Sharpening.
8 : Sharpen Weight = 0.5 (light Sharpening)
9 : Sharpen Weight = 1 (default)
a : Sharpen Weight = 2
b : Sharpen Weight = 3
c : Sharpen Weight = 4
d : Sharpen Weight = 5
e : Sharpen Weight = 6
f : Sharpen Weight = 7 (heavy Sharpening)
0x31 (AD_SHARP_HIGH,Default =0x0a)
Sharpening High Tone Threshold.
0x32 (AD_SHARP_LOW,Default = 0x05)
Sharpening Low Tone Threshold.


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