NOIL1SN3000A
OPERATING MODES
This sensor supports multiple operation modes. The
following list provides an overview.
? Global shutter mode
? Pipelined global shutter mode
? Master mode
? Slave mode
? Triggered global shutter mode
? Master mode
? Slave mode
Global Shutter Mode
In a global shutter mode, light integration takes place on
all pixels in sync, although subsequent readout is sequential
as shown in Figure 18. Figure 19 shows the integration and
readout sequence for the global shutter. All pixels are light
sensitive at the same time. The whole pixel core is reset
simultaneously and after the integration time, all pixel
values are sampled together on the storage node inside each
pixel. The pixel core is read out line by line after integration.
Note that the integration and readout can occur in parallel or
sequentially. The integration starts at a certain period,
relative to the frame start.
Pipelined Global Shutter Mode
In pipelined shutter mode, the integration and readout are
done in parallel. Images are continuously read and
integration of frame N is ongoing during readout of the
previous frame N-1. The readout of every frame starts with
a FOT, during which the analog value on 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 the ROT.
Master Mode
In this operation mode, the integration time is set through
the register interface and the sensor integrates and reads out
the images autonomously. The sensor acquires images
without any user interaction.
Slave Mode
The slave mode adds more manual control to the sensor.
The integration time registers are ignored in this mode and
the integration time is instead controlled by an external pin.
As soon as the control pin is asserted, the pixel array goes out
of reset and integration starts. The integration continues
until the user/system deasserts the external pin. Then the
image is sampled and the readout starts.
Common Reset
Integration Time
Common Sample & Hold
Time
Burst
Readout
Time
Figure 18. Global Shutter Operation
Integration Time
Handling
Readout
Handling
FOT
Reset N
Exposure Time N
Readout Frame N-1
FOT
FOT
Reset N+1
Exposure Time N+1
Readout Frame N
FOT
FOT
ROT
Line Readout
Figure 19. Integration and Readout for Pipelined Shutter
http://onsemi.com
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相关PDF资料
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