MT9P031I12STM-ES Aptina LLC, MT9P031I12STM-ES Datasheet - Page 42

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

Specifications of MT9P031I12STM-ES

• Lead Free Status / RoHS Status: Supplier Unconfirmed

Mirror
Column Mirror Image
Figure 21:
Row Mirror Image
Figure 22:
Maintaining a Constant Frame Rate
PDF: 09005aef81a4a477/Source: 09005aef81a4a495
MT9P031_DS - Rev. E 7/10 EN
Six Pixels in Normal and Column Mirror Readout Modes
Six Rows in Normal and Row Mirror Readout Modes
By setting R0x20[14] = 1, the readout order of the columns is reversed, as shown in
Figure 21. The starting color, thus Bayer pattern, is preserved when mirroring the
columns.
By setting R0x20[15] = 1, the readout order of the rows is reversed as shown in Figure 22.
The starting color, thus Bayer pattern, is preserved when mirroring the rows.
By default, active pixels in the resulting image are output in row-major order (an entire
row is output before the next row is begun), from lowest row/column number to highest.
If desired, the output (and sampling) order of the rows and columns can be reversed.
This affects only pixels in the active region defined above, not any pixels read out as dark
rows or dark columns. When the readout direction is reversed, the color order is reversed
as well (red, green, red, and so on, instead of green, red, green, and so on, for example).
If row binning is combined with row mirroring, the binning is still done in the positive
direction. Therefore, if the first output row in bin 2x + row mirror was 1997, pixels on
rows 1997 and 1999 would be averaged together. The next pixel output would be from
rows 1996 and 1998, followed by the average of 1993 and 1995.
For column mirroring plus binning, the span of pixels used should be the same as with
non-mirror mode.
Maintaining a constant frame rate while continuing to have the ability to adjust certain
parameters is the desired scenario. This is not always possible, however, because register
updates are synchronized to the read pointer, and the shutter pointer for a frame is
Reverse readout
Normal readout
Normal readout
Reverse readout
D
D
D
D
OUT
OUT
OUT
OUT
[11:0]
[11:0]
[11:0]
[11:0]
LV
FV
Row0 [11:0] Row1 [11:0] Row2 [11:0] Row3 [11:0] Row4 [11:0] Row5 [11:0]
Row5 [11:0] Row4 [11:0] Row3 [11:0] Row2 [11:0] Row1 [11:0] Row0 [11:0]
G0[11:0] R0[11:0] G1[11:0] R1[11:0] G2[11:0] R2[11:0]
R2[11:0] G2[11:0] R1[11:0] G1[11:0] R0[11:0] G0[11:0]
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MT9P031: 1/2.5-Inch 5Mp Digital Image Sensor
Aptina reserves the right to change products or specifications without notice.
©2005 Aptina Imaging Corporation. All rights reserved.
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