NOIP1SN5000A_16 Datasheet, PDF (12/75 Pages) ON Semiconductor – PYTHON 5.0/2.0 MegaPixels Global Shutter CMOS Image Sensors

NOIP1SN5000A
External Trigger
Integration Time
Handling
Reset
N
Exposure Time N
FOT
Reset
N+1
Exposure T im e N+1
FOT
Readout
Handling
FOT
Readout N−1
FOT
Readout N
FOT
RO^ÉÉT ^ÉÉLin^ÉÉeRea^ÉÉdout ^{ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ}
Figure 11. Pipelined Shutter Operation in Slave Mode
Triggered Global Shutter Mode
In this mode, manual intervention is required to control
both the integration time and the start of readout. After the
integration time, indicated by a user controlled pin, the
image core is read out. After this sequence, the sensor goes
to an idle mode until a new user action is detected.
The three main differences with the pipelined global
shutter mode are:
• Upon user action, one single image is read.
• Normally, integration and readout are done
sequentially. However, the user can control the sensor
in such a way that two consecutive batches are
overlapping, that is, having concurrent integration and
readout.
• Integration and readout is under user control through an
external pin.
This mode requires manual intervention for every frame.
The pixel array is kept in reset state until requested.
The triggered global shutter mode can also be controlled
in a master or in a slave mode.
Master Mode
In this mode, a rising edge on the synchronization pin is
used to trigger the start of integration and readout. The
integration time is defined by a register setting. The sensor
autonomously integrates during this predefined time, after
which the FOT starts and the image array is readout
sequentially. A falling edge on the synchronization pin does
not have any impact on the readout or integration and
subsequent frames are started again for each rising edge.
Figure 12 shows the relation between the external trigger
signal and the exposure/readout timing.
If a rising edge is applied on the external trigger before the
exposure time and FOT of the previous frame is complete,
it is ignored by the sensor.
External Trigger
No effect on falling edge
Integration Tim e
Handling
Readout
Handling
Reset
N
Exposure Tim e N
Register Controlled
FOT
Reset
N+1
Exposure Tim e N +1
FOT
FOT
Readout N -1
FOT
Readout N
FOT
ÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉÉ
ROT
Line Readout
Figure 12. Triggered Shutter Operation in Master Mode
Slave Mode
Integration time control is identical to the pipelined
shutter slave mode. An external synchronization pin
controls the start of integration. When it is de−asserted, the
FOT starts. The analog value on the pixel diode is
transferred to the pixel memory element and the image
readout can start. A request for a new frame is started when
the synchronization pin is asserted again.
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