AR0141CS datasheet(30/48 Pages) ONSEMI

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AR0141CS

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Figure 33. Format of Embedded Statistics Output within a Frame

{2’b00,frame

_countLSB}

{2’b00,frame

_IDMSB}

{2’b00,frame

_IDLSB}

histogram

bin0[9:0]

histogram

bin1[9:0]

#words=

10’h1EC

data_format_

code=8’h0B

#words=

10’h00C

data_format_

code=8’h0B

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

statsline 1

stats line 2

histogram

bin0[19:10]

histogram

bin243 [19:0]

histogram

bin243 [9:0]

histogram

bin1 [19:0]

mean

[19:10]

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

• Mean

• Histogram Begin

• Histogram End

• Low End Histogram Mean

• Percentage of Pixels Below Low End Mean

• Normal Absolute Deviation

Test Patterns

The AR0141CS has the capability of injecting a number

of test patterns into the top of the datapath to debug the

digital logic. With one of the test patterns activated, any of

the datapath functions can be enabled to exercise it in a

deterministic fashion. Test patterns are selected by

Test_Pattern_Mode register (R0x3070). Only one of the test

patterns can be enabled at a given point in time by setting the

Test_Pattern_Mode register according to Table 17. When

test patterns are enabled the active area will receive the value

specified by the selected test pattern and the dark pixels will

receive the value in Test_Pattern_Green (R0x3074 and

R0x3078) for green pixels, Test_Pattern_Blue (R0x3076)

for blue pixels, and Test_Pattern_Red (R0x3072) for red

pixels. The noise pedestal offset at register 0x30FE impacts

on the test pattern output, so the noise_pedestal needs to be

set as 0x0000 for normal test pattern output.

Table 17. TEST PATTERN MODES

Test_Pattern_Mode

Test Pattern Output

No test pattern (normal operation)

Solid color test pattern

100% Vertical Color Bars test pattern

Fade−to−Gray Vertical Color Bars test pattern

256

Walking 1s test pattern (12−bit)

Solid Color

When the color field mode is selected, the value for each

pixel is determined by its color. Green pixels will receive the

value in Test_Pattern_Green, red pixels will receive the

value in Test_Pattern_Red, and blue pixels will receive the

value in Test_Pattern_Blue.

Vertical Color Bars

When the vertical color bars mode is selected, a typical

color bar pattern will be sent through the digital pipeline.

Walking 1s

When the walking 1s mode is selected, a walking 1s

pattern will be sent through the digital pipeline. The first

value in each row is 1.

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