STV0657 datasheet(11/105 Pages) STMICROELECTRONICS

11 / 105 page

CMOS Sensor; Customer Datasheet, Rev 3.0, 28 September 2000

VV5410 & VV6410

Commercial in confidence

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cd5410-6410f-3-0.fm

3.3

X-offset and Y-offset

The image information is retrieved from the pixel array via a 2 dimensional address. The x and y address busses count from a

starting point described by x-offset, y-offset up to a maximum count in x and y that is determined by the image size. The order of

this count and the count step size is dependent upon the special image format parameters described below. The detailed control

of the x and y address counters is entirely handled by the sensor logic

As can be seen in Figure 3 the visible array size is 364 columns by 296 rows. The PAL and CIF images are sized, 356 columns

by 292 rows, thus we have a “border” of visible pixels that we do not read out if either of these modes are selected.

The images that are read out of the sensor are always “centred” on the array, therefore we allow a border of 4 columns at either

end of the image in the x-direction and a border of 2 rows at the top and bottom of the image in the y-direction. The pantilt QCIF

and NTSC video modes are similarly centred within the full size array.

For all the modes except the pantilt QCIF the x and y offset coordinates are fixed. If the user selects the pantilt QCIF mode then

they may specify x and y-offsets in the range:

•

(xoffset >= 1) and (xoffset <= 185)

•

(yoffset >= 5) and (yoffset <= 149)

The sensor will automatically clip values outwith the specified ranges. The y addresses less than 5 are reserved for the sensor

black lines and the y address greater than 296 are reserved for the sensor dark lines. Neither the black lines nor the dark lines

contain visible image data

Figure 2 : Bayer Colourisation Pattern (VV6410 only)

Green 1

Blue

Green 2

Red

Odd Rows

(5, 7, 9,...)

Even Rows

(4, 6, 8,...)

Odd

Columns

(1,3,5,...)

Even

Columns

(2, 4, 6,...)

STV0657 Arkusz danych(PDF) 11 Page - STMicroelectronics