AR0141CS datasheet(38/64 Pages) ONSEMI

38 / 64 page

AR0141CS/D Rev. 6, 4/16 EN

©Semiconductor Components Industries, LLC, 2016.

AR0141CS: 1/4-Inch Digital Image Sensor

Changing Sensor Modes

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 signi-

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

Figure 33:

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 (TAG)

•Mean

• Histogram Begin

•Histogram End

•Low End Histogram Mean

• Percentage of Pixels Below Low End Mean

• Normal Absolute Deviation

{2'b00,frame

_count MSB}

{2'b00,frame

_count LSB}

{2'b00,frame

_ID MSB}

{2'b00,frame

_ID LSB}

histogram

bin0 [19:10]

histogram

bin0 [9:0]

histogram

bin1 [19:0]

histogram

bin1 [9:0]

# words =

10'h1EC

data_format_

code = 8'h0B

histogram

bin243 [19:0]

histogram

bin243 [9:0]

# words =

10'h00C

data_format_

code = 8'h0B

mean

[19:10]

mean

[9:0]

histBegin

[19:10]

histBegin

[9:0]

histEnd

[19:10]

histEnd

[9:0]

lowEndMean

[19:10]

lowEndMean

[9:0]

perc_lowEnd

[19:10]

perc_lowEnd

[9:0]

norm_abs_

dev [19:10]

norm_abs_

dev [9:0]

8'h07

stats line 1

stats line 2

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