NOIL2SM1300A-GWC ON Semiconductor, NOIL2SM1300A-GWC Datasheet - Page 23

• Manufacturer Part Number: NOIL2SM1300A-GWC
• Manufacturer: ON Semiconductor

Specifications of NOIL2SM1300A-GWC

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Master Mode
trigger the start of integration and read out. The tint_timer
defines the integration time independent of the assertion of
the input pin int_time1. After the integration time counter
runs out, the FOT automatically starts and the image readout
is done. During readout, the image array is kept in reset. A
request for a new frame is started again when a new rising
edge on int_time is detected. The time of the falling edge is
not important in this mode.
Non Destructive Readout (NDR)
method. After a pixel is initially reset, it can be read multiple
times, without being reset. You can record the initial reset
level and all intermediate signals. High light levels saturate
the pixels quickly, but a useful signal is obtained from the
early samples. For low light levels, the later or latest samples
reset is programmable in the nr_of_ndr_steps register. If
nr_of_ndr_steps is one, the sensor operates in the default
method, that is one reset and one sample. This is called the
disable nondestructive read out mode.
Table 14. ADVANTAGES AND DISADVANTAGES OF NON DESTRUCTIVE READOUT
Low noise, because it is true CDS
High sensitivity. The conversion capacitance is kept low.
High dynamic range. The results include signals for short and long
integration times.
In this mode, a rising edge on int_time1 pin is used to
The sensor can also be read out in a nondestructive
Note that the amount of samples taken with one initial
Advantages
Figure 17. Principle of Non Destructive Readout
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System memory required to record the reset level and the
intermediate samples
Requires multiples readings of each pixel, so there is higher data
throughput
Requires system level digital calculations
Slave Mode
shutter slave mode. The int_time1 pin controls the start of
integration. When int_time is deasserted, the FOT starts
(analog value on the pixel diode is transferred to the pixel
memory element). Only at that time, image read out can start
(similar to the pipelined read out). During read out, the
image array is kept in reset. A request for a new frame is
started when int_time goes high again.
must be used. Essentially, an active pixel array is read
multiple times, and reset only once. The external system
intelligence interprets the data. Table 14 on page 23
summarizes the advantages and disadvantages of
nondestructive readout.
samples, and so on. In the slave mode, nothing changes on
the protocol of the signals int_time_*. The sequencer
suppresses the internal reset signal to the pixel array.
Integration time control is identical to the pipelined
When nr_of_ndr_steps is two, there is one reset and two
Disadvantages
time