AR0130CSSC00SPBA0-DP datasheet(28/53 Pages) ONSEMI

28 / 53 page

AR0130 DS Rev. L Pub. 6/15 EN

©Semiconductor Components Industries, LLC, 2015.

AR0130: 1/3-Inch CMOS Digital Image Sensor

Features

Embedded Statistics

The embedded statistics contain frame identifiers and histogram information of the

image in the frame. This can be used by downstream auto-exposure 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 212, 120 evenly spaced bins for values 212 to 216, 60 evenly spaced

bins for values 216 to 220.

The first pixel of each line in the embedded statistics is a tag value of 0x0B0. This signi-

fies that all subsequent statistics data is 10 bit data aligned to the MSB of the 12-bit pixel.

The figure below summarizes how the embedded statistics transmission looks like. It

should be noted that data, as shown in Figure 19, is aligned to the msb of each word:

Figure 19:

Format of Embedded Statistics Output within a Frame

The statistics embedded in these rows are as follows:

Line 1:

• 0x0B0 - identifier

• Register 0x303A - frame_count

• Register 0x31D2 - frame ID

• Histogram data - histogram bins 0-243

Line 2:

•0x0B0 (identifier)

•Mean

•Histogram Begin

•Histogram End

•Low End Histogram Mean

• Percentage of Pixels Below Low End Mean

• Normal Absolute Deviation

lowEndMean

[19:10]

stats line 1

stats line 2

histogram

bin1 [9:0]

#words =

10’h1EC

{2’b00, frame

_count MSB}

{2’b00, frame

_ID MSB}

{2’b00, frame

_ID LSB}

histogram

bin0 [19:10]

histogram

bin0 [9:0]

histogram

bin1 [19:10]

data_format_

code =8'h0B

#words =

10’h1C

mean [ 19:10]

mean [9:0]

hist_begin

[19:10]

hist_begin

[9:10]

8'h07

data_format_

code =8'h0B

{2’b00, frame

_count LSB}

8'h07

histogram

bin243 [19:10]

histogram

bin243 [9:0]

8'h07

hist_end

[19:10]

hist_end

[9:10]

lowEndMean

[9:0]

perc_lowEnd

[19:10]

perc_lowEnd

[9:0]

norm_abs_dev

[19:10]

lnorm_abs_dev

[9:0]

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