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AR0141CS View Datasheet(PDF) - ON Semiconductor

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AR0141CS
ON-Semiconductor
ON Semiconductor ON-Semiconductor
AR0141CS Datasheet PDF : 48 Pages
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AR0141CS
Embedded Data and Statistics
The AR0141CS has the capability to output image data
and statistics embedded within the frame timing. There are
two types of information embedded within the frame
readout.
Embedded Data:
If enabled, these are displayed on the two rows
immediately before the first active pixel row is
displayed
Embedded Statistics:
If enabled, these are displayed on the two rows
immediately after the last active pixel row is displayed
Register Data
Image
HBlank
Status & Statistics Data
VBlank
Figure 32. Frame Format with Embedded Data Lines Enabled
Embedded Data
The embedded data contains the configuration of the
image being displayed. This includes all register settings
used to capture the current frame. The registers embedded
in these rows are as follows:
Line 1: Registers R0x3000 to R0x312F.
Line 2: Registers R0x3136 to R0x31BF, R0x31D0 to
R0x31FF.
NOTE: All undefined registers will have a value of 0.
In parallel mode, since the pixel word depth is 12
bits/pixel, the sensor 16bit register data will be transferred
over 2 pixels where the register data will be broken up into
8 MSB and 8 LSB. The alignment of the 8bit data will be
on the 8 MSB bits of the 12bit pixel word. For example, if
a register value of 0x1234 is to be transmitted, it will be
transmitted over two, 12bit pixels as follows: 0x120,
0x340.
Embedded Statistics
The embedded statistics contain frame identifiers and
histogram information of the image in the frame. This can be
used by downstream autoexposure algorithm blocks to
make decisions about exposure adjustment.
This histogram is divided into 244 bins with a bin spacing
of 64 evenly spaced bins for digital code values 0 to 28, 120
evenly spaced bins for values 28 to 212, 60 evenly spaced
bins for values 212 to 216. It is recommended that auto
exposure algorithms be developed using the histogram
statistics on line 1.
The first pixel of each line in the embedded statistics is a
tag value of 0x0B0. This signifies that all subsequent
statistics data is 10 bit data aligned to the MSB of the 12bit
pixel.
Figure 33 summarizes how the embedded statistics
transmission looks like. It should be noted that data, as
shown in Figure 33, is aligned to the MSB of each word:
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