mt9v032 aptina, mt9v032 Datasheet - Page 44

• Manufacturer Part Number: mt9v032
• Description: 1/3-inch Wide-vga Cmos Digital Image Sensor
• Manufacturer: aptina

Figure 21:
Figure 22:
PDF: 6538045704/Source:2194051501
MT9V022_DS - Rev. C 9/10 EN
Sequence of Control Voltages at the HDR Gate
Sequence of Voltages in a Piecewise Linear Pixel Response
The parameters of the step voltage V_Step which takes values V1, V2, and V3 directly
affect the position of the knee points in Figure 22.
Light intensities work approximately as a reciprocal of the partial exposure time. Typi-
cally,
shortest for the first slope, providing the highest sensitivity.
There are two ways to specify the knee points timing, the first by manual setting (default)
and the second by automatic knee point adjustment.
When the auto adjust enabler is set to HIGH (LOW by default), the MT9V032 calculates
the knee points automatically using the following equations:
As a default for auto exposure,
Voltage
The register settings for V_Step and partial exposures are:
V1 = R0x31, bits 4:0
V2 = R0x32, bits 4:0
V3 = R0x33, bits 4:0
V4 = R0x34, bits 4:0
t
HDR
INT =
t
1 is the longest exposure,
1/t
1
t
1 +
t
2 +
t
t
2 =
3 =
t
V
3
t
t
AA
dV1
INT x (½)
INT x (½)
t
1/t
1 =
(3.3V)
2
t
INT -
t
1
R0x0A, bits 3:0
R0x0A, bits 7:4
45
t
2 -
t
V1~1.4V
t
2 is 1/16 of
2 shorter, and so on. Thus the range of light intensities is
t
3
MT9V032: 1/3-Inch Wide-VGA Digital Image Sensor
dV2
Light Intensity
1/t
3
t
Exposure
INT,
t
3 is 1/64 of
V2~1.2V
Aptina reserves the right to change products or specifications without notice.
t
dV3
2
t
INT.
©2005 Aptina Imaging Corporation. All rights reserved.
V3~1.0V
t
3
Feature Description
V4~0.8V
(EQ 2)
(EQ 3)
(EQ 4)