STV-5410-R01 STMICROELECTRONICS [STMicroelectronics], STV-5410-R01 Datasheet - Page 16

• Manufacturer Part Number: STV-5410-R01
• Description: Mono and Colour Digital Video CMOS Image Sensors
• Manufacturer: STMICROELECTRONICS [STMicroelectronics]

VV5410 & VV6410
3.4
VV5410/VV6410 has two QCIF output modes, pan/tilt QCIF (ptQCIF) and sub sampled QCIF (ssQCIF), both of which have the
same output format. The data contained within the active QCIF image differs between the sub sampled and pan tilt modes. As
the QCIF mode contains a quarter of the data of the CIF mode, the effective pixel clock can be run at a quarter of the rate. This
means that in CIF mode a system clock of 16MHz will produce a field rate of 30fps, whereas in QCIF mode a system clock of only
8MHz is required to produce the same field rate. Note that the sensor divides the system clock internally by 4 for CIF mode and 8
for QCIF mode. If the user supplied the sensor with a 16Mhz system clock and selected QCIF mode then a field rate of 60fps is
possible.
3.4.1
In this mode the QCIF image is generated by outputting a cropped portion of the CIF image as illustrated in Figure 9. When the
pan-tilt QCIF video mode is initially selected the image will be horizontally and vertically justified in the within the full size array
(364 pixels by 292 pixels). The coordinates which define the top left corner of the QCIF portion of the array to be output are
defined by the x-offset & y-offset parameters in serial registers [88 - 91] inclusive.
The x-offset and y-offset parameters are subject to minimum and maximum values which are set according to the video output
mode (horizontal shuffle etc). Any clipping (against a maximum) or clamping (against a minimum) will be automatically controlled
by the sensor logic. Regardless of whether any of the shuffle/mirror modes have been selected the user should always identify
the top left corner coordinates as the x-offset and y-offset. To preserve the Bayer pattern at the sensor output the first pixel image
of the image should always be green followed by red. If the x or y offsets are adjusted by a single step, i.e. adjust the x-offset from
n to n+1, then this pattern will be corrupted. The user should always write an odd number to the x and y offset registers and this
will preserve the Bayer pattern. The 5410, monochrome sensor is unaffected by such an adjustment to the x-offset coordinate, as
the pixels do not contain any colour information.
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QCIF Output Modes
Pan/Tilt QCIF
x-offset
y-offset
QCIF Image
Figure 9 : Pan/Tilt QCIF Image Format
Commercial in confidence
180 pixels
cd5410-6410f-3-0.fm
364 pixels
Operating Modes