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CSG14K_CSG8K

Functional Description

Datasheet

• PUBLIC

DS000571

• v2-01 • 2023-Feb-10

113

│ 93

Figure 118:

Timing Histogram Data

Every element of the histogram data is split into two consecutive output words (length set by

OUTP_BITMODE). The LSBs are always placed in the first of these two words of the

element. The various elements are listed in the table below.

Figure 119:

Histogram Elements

Element #

Name

Description

All-1

Start of sequence marker

Histogram ID:

0 = All color channels

1 = Pixels of even rows, even columns

2 = Pixels of even rows, odd columns

3 = Pixels of odd rows, even columns

4 = Pixels of odd rows, odd columns

Bin containing the pixels that are 0

3-34

B0-B31

32 equally sized histogram bins spread over the entire output range

C31

Bin containing the pixels that have the maximum value in the active bit

mode (defined by DPATH_BITMODE)

All pixels in bin C0 are also part of bin B0. In the same way, all pixels in bin C31 are part of

bin B31.

Not all pixels are included in the statistics gathering, although the selected pixels are evenly

distributed over the image. The spatial distribution is configured by setting STAT_FREQ. The

best distribution is achieved when it is set to 8.

The total amount of pixels included in the histogram depends on a number of readout

settings, therefore the histogram bins must be compared in a relative way.

ERRATUM: The last word of bin C31 is not transmitted off-chip. The amount of data words

per histogram is 71, instead of 72 as indicated in Figure 15. As a result, bin C31 is not usable

and should be discarded by the user.

SVAL

DATA0_OUT

all-1

1 output

word

B31

C31

72 output words

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