NOIP1FN2000A-QDI datasheet(13/75 Pages) ONSEMI

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NOIP1SN5000A

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Non−Zero and Zero Row Overhead Time (ROT) Modes

In pipelined global shutter mode, the integration and

readout are done in parallel. Images are continuously read

out and integration of frame N is ongoing during readout of

the previous frame N−1. The readout of every frame starts

with a Frame Overhead Time (FOT), during which the

analog value of the pixel diode is transferred to the pixel

memory element. After the FOT, the sensor is read out line

by line and the readout of each line is preceded by a Row

Overhead Time (ROT) as shown in Figure 13.

In Reduced/Zero ROT operation mode (refer to

Figure 14), the row blanking and kernel readout occur in

parallel. This mode is called reduced ROT as a part of the

ROT is done while the image row is readout. The actual ROT

can thus be longer, however the perceived ROT will be

shorter (‘overhead’ spent per line is reduced).

This operation mode can be used for two reasons:

• Reduced total line time.

• Lower power due to reduced clock−rate.

Figure 13. Integration and Readout Sequence of the Sensor Operating in Pipelined Global Shutter Mode with

Non−Zero ROT Readout.

ROT

ys+1

ROT

Readout

Valid Data

FOT

()

Readout

Figure 14. Integration and Readout Sequence of the Sensor operating in Pipelined Global Shutter Mode with

Zero ROT Readout.

ROT

(blanked out)

ROT

Readout

ys+1

ROT

Readout

ye−1

ROT

Readout

dummy

Valid Data

FOT

()

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