MT9P031I12STM-ES Aptina LLC, MT9P031I12STM-ES Datasheet - Page 46

• Manufacturer Part Number: MT9P031I12STM-ES
• Manufacturer: Aptina LLC

Specifications of MT9P031I12STM-ES

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Operating Modes
Table 15:
PDF: 09005aef81a4a477/Source: 09005aef81a4a495
MT9P031_DS - Rev. E 7/10 EN
Mode
ERS Continuous
ERS Snapshot
ERS Bulb
GRR Snapshot
GRR Bulb
Operating Modes
Settings
Default
Snapshot = 1
Snapshot = 1;
Bulb_Exposure = 1
Snapshot = 1;
Global_Reset = 1
Snapshot = 1;
Bulb_Exposure = 1;
Global_Reset = 1
Note:
1. Wait for the first trigger, then start the exposure.
2. Wait for the second trigger, then start the readout.
The exposure time is calculated by determining the reset time of each pixel row (with
time 0 being the start of the first row time), and subtracting it from the sample time.
Under normal conditions in ERS modes, every pixel should end up with the same expo-
sure time. In global shutter release modes, or in row binning modes, the exposure times
of individual pixels can vary.
In global shutter release modes (described later) exposure time starts simultaneously for
all rows, but still ends as defined above. In a real system, the exposure would be stopped
by a mechanical shutter, which would effectively stop the exposure to all rows simulta-
neously. Because this specification does not consider the effect of an external shutter,
each output row's exposure time will differ by
Global shutter modes also introduce a constant added to the shutter time for each row,
because the exposure starts during the global shutter sequence, and not during any
row's shutter sequence. For each additional row in a row bin, this offset will increase by
the length of the shutter sequence.
In Bulb_Exposure modes (also detailed later), the exposure time is determined by the
width of the TRIGGER pulse rather than the shutter width registers. In ERS bulb mode, it
is still a multiple of row times, and the shutter overhead equation still applies. In GRR
bulb mode, the exposure time is granular to ACLKs, and shutter overhead (and thus
Shutter_Delay) has no effect.
In the default operating mode, the MT9P031 continuously samples and outputs frames.
It can be put in "snapshot" or triggered mode by setting snapshot, which means that it
samples and outputs a frame only when triggered. To leave snapshot mode, it is neces-
sary to first clear Snapshot then issue a restart.
When in snapshot mode, the sensor can use the ERS or the GRR. The exposure can be
controlled as normal, with the Shutter_Width_Lower and Shutter_Width_Upper regis-
ters, or it can be controlled using the external TRIGGER signal. The various operating
modes are summarized in Table 15.
All operating modes share a common set of operations:
In ERS bulb mode, SW must be greater than 4 (use trigger wider than
Description
Frames are output continuously at the frame rate defined by
exposure time is electronically controlled to be
Frames are output one at a time, with each frame initiated by a trigger. ERS is used, and the
exposure time is electronically controlled to be
Frames are output one at a time, with each frame's exposure initiated by a trigger. ERS is used.
End of exposure and readout are initiated by a second trigger.
Frames are output one at a time, with each frame initiated by a trigger. GRR is used. Readout is
electronically triggered based on SW.
Frames are output one at a time, with each frame initiated by a trigger. GRR is used. Readout is
initiated by a second trigger.
46
MT9P031: 1/2.5-Inch 5Mp Digital Image Sensor
t
ROW from the previous row.
t
t
EXP.
EXP.
Aptina reserves the right to change products or specifications without notice.
t
t
ROW * 4).
FRAME. ERS is used, and the
©2005 Aptina Imaging Corporation. All rights reserved.
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