AR0833 Datasheet, PDF (33/64 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
Window Control
The sequencing of the pixel array is controlled by the x_addr_start, y_addr_start, x_ad-
dr_end, and y_addr_end registers. The output image size is controlled by the x_output_-
size and y_output_size registers.
Pixel Border
The default settings of the sensor provide a 3264H x 2448V image. A border of up to
8 pixels (4 in binning) on each edge can be enabled by reprogramming the x_addr_start,
y_addr_start, x_addr_end, y_addr_end, x_output_size, and y_output_size registers
accordingly. These border pixels can be used but are disabled by default.
Readout Modes
Horizontal Mirror
The horizontal_mirror bit in the image_orientation register is set by default. The result of
this is that the order of pixel readout within a row is reversed, so that readout starts from
x_addr_end and ends at x_addr_start. Figure 20 on page 33 shows a sequence of 6 pixels
being read out with horizontal_mirror = 0 and horizontal_mirror = 1. Changing horizon-
tal_mirror causes the Bayer order of the output image to change; the new Bayer order is
reflected in the value of the pixel_order register.
Figure 20: Effect of horizontal_mirror on Readout Order
LINE_VALID
horizontal_mirror = 0
DOUT[9:0]
G0[9:0] R0[9:0] G1[9:0] R1[9:0] G2[9:0] R2[9:0]
horizontal_mirror = 1
DOUT[9:0]
R2[9:0] G2[9:0] R1[9:0] G1[9:0] R0[9:0] G0[9:0]
Vertical Flip
When the vertical_flip bit is set in the image_orientation register, the order in which
pixel rows are read out is reversed, so that row readout starts from y_addr_end and ends
at y_addr_start. Figure 21 shows a sequence of 6 rows being read out with vertical_flip =
0 and vertical_flip = 1. Changing vertical_flip causes the Bayer order of the output image
to change; the new Bayer order is reflected in the value of the pixel_order register.
Figure 21: Effect of vertical_flip on Readout Order
FRAME_VALID
vertical_flip = 0
DOUT[9:0]
Row0[9:0] Row1[9:0] Row2[9:0] Row3[9:0] Row4[9:0] Row5[9:0]
vertical_flip = 1
DOUT[9:0]
Row5[9:0] Row4[9:0] Row3[9:0] Row2[9:0] Row1[9:0] Row0[9:0]
AR0833_DS Rev. H Pub. 4/15 EN
33
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