AR0130 Datasheet, PDF (16/53 Pages) ON Semiconductor – CMOS Digital Image Sensor

AR0130: 1/3-Inch CMOS Digital Image Sensor
Output Data Format
Table 5:
Frame Time: Long Integration Time
Parameter
F’
Name
Total frame time (long
integration time)
Equation
(Number of Pixel Clock Cycles)
Context A: (R0x3012 x (A + Q)) + R0x3014 + P1 + P2
Context B: (R0x3016 x (A + Q)) + V R0x3018 + P1 + P2
Default Timing
at 74.25 MHz
3,300,012 pixel clocks
= 44.44ms
Note:
The AR0130 uses column parallel analog-digital converters; thus short line timing is not possible.
The minimum total line time is 1390 columns (horizontal width + horizontal blanking). The mini-
mum horizontal blanking is 110.
Exposure
Total integration time is the result of Coarse_Integration_Time and Fine_Integration_-
Time registers, and depends also on whether manual or automatic exposure is selected.
The actual total integration time, t_INT is defined as:
t_INT = t_INTCoarse - 410 - t_INTFine
(EQ 2)
= (number of lines of integration x line time) - (410 pixel clocks of conversion time over-
head) - (number of pixels of integration x pixel time)
where:
– Number of Lines of Integration (Auto Exposure Control: Enabled)
When automatic exposure control (AEC) is enabled, the number of lines of integra-
tion may vary from frame to frame, with the limits controlled by R0x311E (mini-
mum auto exposure time) and R0x311C (maximum auto exposure time).
– Number of Lines of Integration (Auto Exposure Control: Disabled)
If AEC is disabled, the number of lines of integration equals the value in R0x3012
(context A) or R0x3016 (context B).
– Number of Pixels of Integration
The number of fine shutter width pixels is independent of AEC mode (enabled or
disabled):
• Context A: the number of pixels of integration equals the value in R0x3014.
• Context B: the number of pixels of integration equals the value in R0x3018.
Typically, the value of the Coarse_Integration_Time register is limited to the number of
lines per frame (which includes vertical blanking lines), such that the frame rate is not
affected by the integration time. For more information on coarse and fine integration
time settings limits, please refer to the Register Reference document.
AR0130 DS Rev. L Pub. 6/15 EN
16
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