AR0833 Datasheet, PDF (49/64 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
This programming restriction must be met for correct operation:
• global_read_start > global_shutter_start.
Figure 36: Controlling the SHUTTER Output
Trigger
Wait for end of current row
Automatic at end of frame readout
ERS Row Reset
Integration
Readout ERS
global_rst_end
global_read_start
global_shutter_start
SHUTTER (signal)
~2*line_length_pck
Using FLASH with Global Reset
If R0x315E global_seq_trigger[2] = 1 (global flash enabled) when a global reset sequence
is triggered, the FLASH output signal will be pulsed during the integration phase of the
global reset sequence. The FLASH output will assert a fixed number of cycles after the
start of the integration phase and will remain asserted for a time that is controlled by the
value of the flash_count register. When flash_count is programmed for value N, (where N
is 0–0x3FE) the resulting flash duration is given by N * 512 * (1/vt_pix_clk_freq_mhz), as
shown in Figure 37.
Figure 37: Using FLASH with Global Reset
Trigger
ERS
Wait for end of
current row
ROW RESET
INTEGRATION
global_rst_end
global_read_start
SHUTTER
FLASH
global_ shutter_start
(fixed)
flash_count
Automatic at end
of frame readout
READOUT
ERS
~2*line_length_pck
AR0833_DS Rev. H Pub. 4/15 EN
49
©Semiconductor Components Industries, LLC, 2015.