MT9V403 Micron, MT9V403 Datasheet - Page 18

• Manufacturer Part Number: MT9V403
• Description: 1/2-INCH VGA (WITH FREEZE-FRAME) CMOS ACTIVE-PIXEL DIGITAL IMAGE SENSOR
• Manufacturer: Micron

Window Location and Size
interest by using the two-wire serial interface to spec-
ify the coordinates of the upper right most pixel and
the lower left most pixel to define the desired window-
ing area as shown in Figure 22. The user can increase
the frame rate by decreasing the number of rows in a
window. Decreasing the number of columns has no
effect on frame rate. For example, for the full 667 col-
umn by 502 row resolution the MT9V403 operates at
196 fps, but if the vertical resolution is decreased by
half (i.e., 251 rows) the frame rate increases propor-
tionally so the frame rate is doubled to 392 fps.
09005aef80c07280
MT9V403_DS.fm - Rev. B 1/04 EN
ROW_VALID
Figure 24: Frame Timing for Master Mode and Snapshot Mode with Windowing
There is also an option to scan just a window of
DATA [9:0]
Figure 23: Row Timing for Master Mode and Snapshot Mode with Windowing
(output)
(output)
SYSCLK
Figure 22: Windowing Example
(input)
FRAME_VALID
ROW_VALID
(1, 1)
DATA [9:0]
(output)
(output)
(output)
START WINDOW
(ROW,COLUMN)
1
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XXX
(ROW,COLUMN)
STOP WINDOW
Start
Row
Row
300
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Row
301
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(502,667)
Column
Start
100
Row
N-1
1/2-INCH VGA (WITH FREEZE-FRAME) CMOS
101
Row
N
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ACTIVE-PIXEL DIGITAL IMAGE SENSOR
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199
Column
Row
397
Stop
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200
Row
398
aware of how the sensor timing is impacted. A key
point to note is that the row time is always 671 clock
cycles, independent of how many columns are actually
read out of the sensor. Figure 23 provides a master
mode row timing example for windowing from column
100 to column 200. This shows how changing the num-
ber of columns in a window will not change the timing
nor the frame rate. Figure 24 provides a master mode
frame timing example for windowing from row 300 to
row 400. This shows how changing the number of rows
in a window will increase the frame rate.
Stop
Row
Row
399
When windowing is utilized, the user should be
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Micron Technology, Inc., reserves the right to change products or specifications without notice.
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Vertical Blanking
1
Row
300
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Row
301
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100
Row
397
101
©2004 Micron Technology. Inc.
Row
398
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Row
399
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199
200