NOII5FM1300A-QDC ON Semiconductor, NOII5FM1300A-QDC Datasheet - Page 15

• Manufacturer Part Number: NOII5FM1300A-QDC
• Manufacturer: ON Semiconductor

Specifications of NOII5FM1300A-QDC

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Electronic Shutter Types
The IBIS5-1300 has two shutter types: a rolling (curtain) shutter
and a global shutter.
Rolling (Curtain) Shutter
The name is due to the fact that the effect is similar to a curtain
shutter of a SLR film camera. Although it is an electronic
operation, the shutter seems to slide over the image. A rolling
shutter is easy and elegant to implement in a CMOS sensor. In
the rolling shutter mode, there are two Y-shift registers. One of
them points to the row that is currently being read out. The other
shift register points to the row that is currently being reset. Both
pointers are shifted by the same Y-clock and move over the focal
plane. The integration time is set by the delay between both
pointers.
Figure 16
times for different lines during the rolling shutter operation. Each
line is read and reset in a sequential way. The integration time is
the same for all lines, but is shifted in time. You can vary the
integration time through the INT_TIME register (in number of
lines).
This indicates that all pixels are light sensitive at another period
of time, and can cause some blurring if a fast moving object is
captured.
Figure 16. Rolling Shutter Operation
When the sensor is set to rolling shutter mode, make certain to
hold the input SS_START and SS_STOP low.
Global Shutter
A global (also known as synchronous or snapshot) shutter solves
the inconvenience found in the rolling shutter. Light integration
takes place on all pixels in parallel, although subsequent readout
is sequential.
Figure 17
synchronous shutter. All pixels are light sensitive at the same
period of 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
Integration Time
graphically displays the relative shift of the integration
shows the integration and read out sequence for the
Frame Time
Time
Rev. 9 | www.onsemi.com | Page 15 of 34
by line after integration. Note that the integration and read out
cycle is carry-out in serial; that causes that no integration is
possible during read out.
During synchronous shutter mode, the input pins SS_START
and SS_STOP are used to start and stop the synchronous
shutter.
Figure 17. Global Shutter Operation
Sequencer
Figure 8
needed to operate the sensor in a particular sub-sampling mode
with a certain integration time, output amplifier gain, and so on.
Most of these signals are generated on-chip by the sequencer
that uses only a few control signals. Make certain that these
control signals are generated by the external system:
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■
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The relative position of the pulses is determined by a number of
data bits that are uploaded in internal registers through the serial
or parallel interface.
Internal Registers
Table 15
description. In the next section, the registers are explained in
more detail. On power-on, all registers in the sensor are reset to
zero. To start operating the sensor, first load all the registers
using the parallel or serial-3-wire interface. The value to be
loaded in each register on power-on is given in the table.
SYS_CLOCK (X-clock) defines the pixel rate
Y_START pulse indicates the start of a new frame read out
Y_CLOCK selects a new row and starts the row blanking
sequence, including the synchronization and loading of the
X-register
SS_START and SS_STOP control the integration period in
snapshot shutter mode.
Common Reset
on page 9 shows a number of control signals that are
shows a list of the internal registers with a short
Integration Time
Common Sample & Hold
Burst
Readout
Time
NOII5SM1300A
Time