IBIS4-6600 Datasheet, PDF (14/63 Pages) Cypress Semiconductor – High resolution 6.6 M Pixel Rolling shutter CMOS Image sensor

IBIS4-6600
Datasheet
3.2.4 Dark and dummy pixels
Figure 7 shows a plan of the pixel array. The sensor has been designed in “portrait”
orientation. A ring of dummy pixels surrounds the active pixels. Black pixels are
implemented as “optical” black pixels.
Dummy ring of pixels,
surrounding complete pixel
array. not read
Ring of dummy pixels,
covered with black layer,
readable
Ring of 2 dummy pixels,
illuminated, readable
array of active pixels, read
3002x 2210
2222
2210
Figure 7: Floor plan pixel array
3.3 Pixel rate
The pixel rate for this sensor is high enough to support a frame rate of >75 Hz for a
window size of 640 x 480 pixels (VGA format) + 23 pixels over scan in both
directions. Taking into account a row blanking time of 7.2 µs (as baseline, see also
3.9.2.a.7.), this requires a minimum pixel rate of nearly 40 MHz. The final bandwidth
of the column amplifiers, output stage etc. is determined by external bias resistors.
Taken into account a pixel rate of 40 MHz a full frame rate of a little more than 5
frames/s will be obtained.
The frame period of the IBIS4-6600 sensor can be calculated as follows:
=> Frame period = (Nr. Lines * (RBT + pixel period * Nr. Pixels))
with:
Nr. Lines: Number of Lines read out each frame (Y).
Nr. Pixels: Number of pixels read out each line (X).
RBT: Row Blanking Time = 7.2 µs (typical).
Pixel period: 1/40 MHz = 25 ns.
Cypress Semiconductor Corporation 3901 North First Street
San Jose, CA 95134
408-943-2600
Contact: [e-mail] Document #: 38-05708 Rev.**(Revision 1.3 )
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