MT9P001 Datasheet, PDF (27/48 Pages) ON Semiconductor – CMOS Digital Image Sensor

MT9P001: 1/2.5-Inch 5Mp Digital Image Sensor
Features
Mirror
Column Mirror Image
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.
Figure 21: Six Pixels in Normal and Column Mirror Readout Modes
LV
Normal readout
DOUT[11:0]
Reverse readout
DOUT[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]
Row Mirror Image
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.
Figure 22: Six Rows in Normal and Row Mirror Readout Modes
FV
Normal readout
DOUT[11:0]
Reverse readout
DOUT[11:0]
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]
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
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
MT9P001_DS Rev. L 4/15 EN
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©Semiconductor Components Industries, LLC,2015.