MOTOROLA
SEMICONDUCTOR TECHNICAL DATA
ImageMOS
Register
No
Register Name
Variable
Gain
Modes
Gain
Steps
Gain Formula
10h
Exposure PGA Global
gg1
Gain Register A; Table
25
RAW
0-32
33-63
0.6956 + (0.02174* gg1d)
1.391+ (0.0434* (gg1d-32)
LINEAR
0-47
0.6956 +(0.0434 x gg1d)
LINEAR 2
0-63
0.6956 + (0.0434 * gg2d)
21h
Exposure PGA Global
gg2
Gain Register B; Table
26
RAW
0-32
33-63
0.6956 + (0.02174* cg2d)
1.391+ (0.0434* (cg2d-32)
LINEAR
0-47
0.6956 +(0.0434 x cg2d)
LINEAR 2
0-63
0.6956 + (0.0434 * gg2d)
Table 4. Exposure Gain modes and Gain Formulas
Gain
Range
0.69-1.39
1.39-2.74
0.69-2.74
0.69-3.60
0.69-1.39
1.39-2.74
0.69-2.74
0.69-3.60
The Diagram below illustrates how the Exposure Gain Registers apply the gain onto the pixel data:
Pixel Data
Exposure PGA Gain
Register A
Exposure PGA Gain
Register B
MOTOROLA
Revision 8.4 - 24 Oct 2002: MCM20027
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