NOII4SM6600A-QDC ON Semiconductor, NOII4SM6600A-QDC Datasheet - Page 12

• Manufacturer Part Number: NOII4SM6600A-QDC
• Manufacturer: ON Semiconductor

Specifications of NOII4SM6600A-QDC

• Lead Free Status / Rohs Status: Supplier Unconfirmed

Sensor Operation
Pixel Rate
The pixel rate for this sensor is high enough to support a frame
rate greater than 75 Hz for a window size of 640 x 480 pixels
(VGA format). With a row blanking time of 7.2 µs (as baseline,
refer the following calculations), requires a minimum pixel rate of
approximately 40 MHz. The bandwidth of the column amplifiers,
gain amplifiers and output stage are determined by external bias
resistors. Taking into account a pixel rate of 40 MHz, a full frame
rate of a little more than 5 frames/s is obtained
The frame period of the IBIS4-6600 sensor is calculated as:
In this equation:
Nr. Lines: Number of Lines read out each frame (Y)
Nr. Pixels: Number of pixels read out each line (X)
Table 7. Frame Rate vs. Resolution
Subsampling Modes
To increase the frame rate for lower resolution and regions of
interest, several sub sampling modes are implemented. The
possible sub sample modes are listed in
programmed in the IMAGE_CORE register (refer
page 17). Two adjacent pixels are read in any mode. The number
of pixels that is not read varies from mode to mode. This is
designed as a repeated block 24 pixels wide, which is the lowest
common multiple of the modes described. Including the dummy
pixels and the two additional rows/columns, the number of
starting coordinates for the x and y shift register is 99 in the X
direction and 138 in the Y direction. The total number of pixels,
excluding dummy pixels, is a multiple of 24, and two additional
pixels to have the same window edges independently of the sub
sampling mode.
=> Frame period = (Nr. Lines * (RBT + pixel period * Nr. Pixels))
Image Resolution (Y*X)
3002 x 2210
1501 x 1104
640 x 480
Frame Rate [frames/s]
Table
14
89
5
8. The bits can be
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Table 11
on
Frame Readout Time [ms]
RBT: Row Blanking Time = 7.2 µs (typical)
Pixel period: 1/40 MHz = 25 ns
Example: Read out time of the full resolution at nominal speed
(40 MHz pixel rate):
=> 5.33 fps.
Region of Interest (ROI) Read Out
Windowing is easily achieved by uploading the starting point of
the x and y-shift registers in the sensor registers (refer
on page 17). This downloaded starting point initiates the shift
register in the x and y-direction, triggered by the Y_START
(initiates the Y-shift register) and the Y_CLK (initiates the X-shift
register) pulse. The minimum step size for the X-address and
Y-address is 24 pixels.The frame rate increases in an almost
linear manner when fewer pixels are read out.
achievable frame rates with ROI read out.
In the X direction, two columns are always addressed at the
same moment, because the signals from the odd and even
columns must be put simultaneously on the corresponding bus.
In the Y direction, the rows are addressed one by one. This
results in slightly different implementations of the sub-sampling
modes for the two directions (Refer
page 14).
Table 8. Subsample Patterns
=> Frame period = (3002 * (7.2 µs + 25 ns * 2210)) = 187.5 ms
Mode
187.5
A
B
C
D
E
67
11
Bits
000
001
010
011
1xx
Read
2
2
2
2
2
Full resolution
ROI read out
Comment
Figure 10
Step
NOII4SM6600A
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2
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6
8
11
Default mode
(Skip 2)
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and
Description
Table 7
Figure 11
Table 11
lists the
on