ASX340 datasheet(26/78 Pages) ETC2

26 / 78 page

PDF: 171981479/Source: 8304342517

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ASX340/MT9V139_DS Rev. C Pub. 3/11 EN

ASX340/MT9V139: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor

Sensor Pixel Array

Aptina Confidential and Proprietary

Preliminary

Output Formats

ITU-R BT.656 and RGB Output

TheASX340/MT9V139 can output processed video as a standard ITU-R BT.656

(CCIR656) stream, an RGB stream, or as unprocessed Bayer data. The ITU-R BT.656

stream contains YCbCr 4:2:2 data with embedded synchronization codes. This output is

typically suitable for subsequent display by standard video equipment or JPEG/MPEG

compression.

Colorpipe data (pre-lens correction and overlay) can also be output in YCbCr 4:2:2 and a

variety of RGB formats in 640 by 480 progressive format in conjunction with

LINE_VALID and FRAME_VALID.

The ASX340/MT9V139 can be configured to output 16-bit RGB (565RGB), 15-bit RGB

(555RGB), and two types of 12-bit RGB (444RGB). Refer to Table 30 and Table 31 on

page 56 for details.

Bayer Output

Unprocessed Bayer data are generated when bypassing the IFP completely—that is, by

simply outputting the sensor Bayer stream as usual, using FRAME_VALID, LINE_VALID,

and PIXCLK to time the data. This mode is called sensor bypass mode.

Output Ports

Composite Video Output

The composite video output DAC is external-resistor-programmable and supports both

single-ended and differential output. The DAC is driven by the on-chip video encoder

output.

Parallel Output

Parallel output uses either 8-bit or 10-bit output. Eight-bit output is used for ITU-R

BT.656 and RGB output. Ten-bit output is used for raw Bayer output.

Zoom Support

The ASX340/MT9V139 supports zoom x1 and x2 modes, in interlaced and progressive

scan modes. The progressive support is limited to the VGA at either 60 fps or 50 fps.

In the zoom x2 modes, the sensor is configured for QVGA (320 x 240), and the zoom x2

window can be configured to pan around the VGA window.

FOV Stretch Support

The ASX340/MT9V139 supports the ability to control the active 'width' of the TV output

line, between 720 and 700 pixels. The hardware supports two margins, each a maximum

of 10 pixels width, and has to be an even number of pixels.

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