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CSG14K_CSG8K

Functional Description

Datasheet

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DS000571

• v1-00 • 2020-Dec-15

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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 14. As a result, bin C31 is not usable and should

be discarded by the user.

7.8.2

In-Line Streaming Mode

Figure 118:

In-Line Streaming Mode Registers

Bank

Addr

Bits

Description

CTRL_MODE

[2:0]

4: In-line streaming mode

EXP_TIME_INL

12-13

[13:0]

Exposure time in in-line streaming mode. Expressed as

multiples of ROW_LENGTH

ROW_LENGTH

18-19

[13:0]

See section 7.5.2

YWIN_ENA

28-29

[9:0]

See section 7.5.3

YWINi

18+4×i

[30:0]

See section 7.5.3

The default frame sequence contains a number of overhead rows (see tread in section 7.5.1, subsection

“Minimal Frame Time Constraint”). Some of the overhead rows, like tstats can be skipped, others not.

Under nominal conditions, these overhead rows do not have a significant impact on the total

throughput because their amount is small compared to the number of valid rows being read (tfval).

If the number of valid rows being read is small ("line scan mode"), however, these overhead rows do

have a significant impact on the maximum achievable frame rate. The in-line streaming mode removes

these overhead rows to achieve a higher frame rate.

Equation 16:

�� = ��glob + �� × ��

In-line streaming mode is typically used with small Y-windows. In this case, the GLOB length can be

reduced to further increase the frame rate.

The in-line streaming mode is enabled by setting the CTRL_MODE register to 4. Just like in normal

streaming mode, the stream is started with a rising edge on REQ_EXP. The stream stays active

forever until externally stopped (with a software non-blocking HALT command or (soft) reset).

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