MT9V032
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22
Table 8. REGISTER DESCRIPTIONS
0X09 (9) SHUTTER WIDTH 2
7:4
T3 Ratio One−half to the power of this value indicates the ratio of
duration time t
3
, when saturation control gate is adjusted to
level V3 to total integration when exposure knee point auto
adjust control bit is enabled. This register is not shadowed,
but any change made does not take effect until the following
new frame.
t
3
= Total integration × (½)
t3_ratio
.
Note: t
1
= Total integration − t
2
− t
3
.
6 N 0–15 W
8 Exposure Knee Point
Auto Adjust Enable
0 = Auto adjust disabled.
1 = Auto adjust enabled.
1 N 0,1 W
9 Single Knee Enable 0 = Single knee disabled.
1 = Single knee enabled.
0 N 0,1 W
0X0B (11) TOTAL SHUTTER WIDTH
14:0
Total Shutter Width Total integration time in number of rows. This value is used
only when AEC is disabled only (bit 0 of Register 175). This
register is not shadowed, but any change made does not
take effect until the following new frame.
1E0
(480)
N 1–32767 W
0X0C (12) RESET
0
Soft Reset Setting this bit causes the sensor to abandon the current
frame by resetting all digital logic except two−wire serial
interface configuration. This is a self−resetting register bit
and should always read “0.” (This bit de−asserts internal
active LOW reset signal for 15 clock cycles.)
0 N 0, 1 W
1 Auto Block Soft Reset Setting this bit causes the sensor to reset the automatic
gain and exposure control logic. This is a self−resetting
register bit and should always read “0.” (This bit de−asserts
internal active LOW reset signal for 15 clock cycles.)
0 Y 0, 1 W
0X0D (13) READ MODE
1:0
Row Bin 0 = Normal operation.
1 = Row bin 2. Two pixel rows are read per row output.
Image size is effectively reduced by a factor of 2 vertically
while data rate and pixel clock are not affected. Resulting
frame rate is increased by 2.
2 = Row bin 4. Four pixel rows are read per row output.
Image size is effectively reduced by a factor of 4 vertically
while data rate and pixel clock are not affected. Resulting
frame rate is increased by 4.
3 = Not valid.
0 Y 0, 1, 2 W
3:2 Column Bin 0 = Normal operation.
1 = Column bin 2. When set, image size is reduced by a
factor of 2 horizontally. Frame rate is not affected but data
rate and pixel clock are reduced by one−half that of
master clock.
2 = Column bin 4. When set, image size is reduced by a
factor of 4 horizontally. Frame rate is not affected but data
rate and pixel clock are reduced by one−fourth that of
master clock.
3 = Not valid.
0 Y 0, 1, 2 W
4 Row Flip Read out rows from bottom to top (upside down). When set,
row readout starts from row (Row Start + Window Height)
and continues down to (Row Start + 1). When clear, readout
starts at Row Start and continues to (Row Start + Window
Height − 1). This ensures that the starting color is main-
tained.
0 Y 0, 1 W
