STV6404E-001 datasheet(6/54 Pages) STMICROELECTRONICS

6 / 54 page

VV5404 & VV6404

CD5404-6404F-A

6/54

Operating Modes

2.1

Image Read-out Options

The output image format is CIF (352 x 288 pixel array). To provide the colour co-processor with the extra information

it needs for interpolation at the edges of the VV6404 pixel array, an optional border 2 pixels deep on all 4 sides of the

array can be enabled (Figure 4). The resulting image size of 356 x 292 pixels is the default power up state for this

camera module. The border option is programmable via the serial interface.

Image read-out is either non-interlaced raster scan, or ‘shuffled’ non-interlaced raster scan.

The shuffled raster scan order differs from a conventional raster in that the pixels of individual rows are re-ordered,

with the odd pixels within a row read-out first, followed by the even pixels.

This ‘shuffled’ read-out within a line, is useful in the VV6404 device as it groups pixels of the same colour (according

to the Bayer pattern - Figure 3) together, reducing cross talk between the colour channels.

NOTE: This option is on by default in both VV5404 and VV6404 sensors and is controllable via the serial interface.

2.2

Frame Rate Options

Two options: 30 fps or 25 fps (Assuming a 7.15909 MHz input clock and the default clock divider setting). The number

of video lines in for each frame rate is the same (304), the slower frame rate is implemented by extending the line

period from 393 pixel periods to 471 pixel periods. 30 fps is the default option, the frame rate is programmable via the

serial interface.

Border

Image size (column x row)

Disabled

352 x 288

Enabled

356 x 292

Default

Table 1 : Image Format Selection.

Frame Rate (fps)

Frame Timing (Pixels x Lines)

471 x 304

393 x 304

default

Table 2 : Frame Rate Selection

Blue

Green

Red

Even

Columns

(0, 2, 4,...)

Odd

Columns

(1, 3, 5,...)

Even

Rows

(0, 2, 4,...)

Odd

Rows

(1, 3, 5,...)

Figure 3 : Bayer Colourisation Pattern. (VV6404 only)

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