AR0833 Datasheet, PDF (44/64 Pages) ON Semiconductor – 8 Mp CMOS Digital Image Sensor

AR0833: 1/3.2-Inch 8 Mp CMOS Digital Image Sensor
Integration Time for Interlaced HDR Readout
• line_length_pck > min_line_length_pck in Table 15.
• The row time must allow the FIFO to output all data during each row. That is,
line_length_pck > (x_output_size * 2 + 0x005E) * “vt_pix_clk period” / “op_pix_clk
period”
Minimum Frame Time
The minimum number of rows in the image is 1, so min_frame_length_lines will always
equal (min_frame_blanking_lines + 1).
Table 15: Minimum Frame Time and Blanking Numbers
min_frame_blanking_lines
min_frame_length_lines
0x008F
0x0A1F
Integration Time
The integration (exposure) time of the AR0833 is controlled by the coarse_integration_-
time register.
The limits for the coarse integration time are defined by:
coarse_integration_time_min < coarse_integration_time
(EQ 11)
The actual integration time is given by:
integration_time = ^---c---o---a---r--s--e---_---i--n---t-e---g---r--a---t--i--o---n---_---t-i--m----e---^*----l--i--n---e--_---l--e---n---g---t-h---_---p---c---k---^
 vt_pix_clk_freq_mhz*10 ⁶ 
It is required that:
coarse_integration_time  (frame_length_lines – coarse_integration_time_max_margin)
(EQ 12)
(EQ 13)
If this limit is broken, the frame time will automatically be extended to (coarse_integra-
tion_time + coarse_integartion_time_max_margin) to accommodate the larger integra-
tion time.
In binning mode, frame_length_lines should be set larger than coarse_integration_time
by at least 3 to avoid column imbalance artifact.
AR0833_DS Rev. H Pub. 4/15 EN
44
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