ASX340CS datasheet(23/74 Pages) ONSEMI

23 / 74 page

ASX340CS_DS Rev. F Pub. 6/15 EN

©Semiconductor Components Industries, LLC, 2015.

ASX340CS: 1/4-Inch Color CMOS NTSC/PAL Digital Image Sensor

Sensor Pixel Array

YUV-to-RGB/YUV Conversion and Output Formatting

The YUV data stream emerging from the colorpipe can either exit the color pipeline as-is

or be converted before exit to an alternative YUV or RGB data format.

Output Format and Timing

YUV/RGB Data Ordering

The ASX340CS supports swapping YCbCr mode, as illustrated in Table 8.

The RGB output data ordering in default mode is shown in Table 9. The odd and even

bytes are swapped when luma/chroma swap is enabled. R and B channels are bit-wise

swapped when chroma swap is enabled.

Uncompressed 10-Bit Bypass Output

Raw 10-bit Bayer data from the sensor core can be output in bypass mode in two ways:

• Using 8 data output signals (DOUT[7:0]) and GPIO[1:0]. The GPIO signals are the least

significant 2 bits of data.

• Using only 8 signals (DOUT[7:0]) and a special 8 + 2 data format, shown in Table 10.

Readout Formats

Progressive format is used for raw Bayer output.

Table 8:

YCbCr Output Data Ordering

Mode

Data Sequence

Default (no swap)

Cbi

Cri

Yi+1

Swapped CbCr

Cri

Cbi

Yi+1

Swapped YC

Cbi

Yi+1

Cri

Swapped CbCr, YC

Cri

Yi+1

Cbi

Table 9:

RGB Ordering in Default Mode

Mode (Swap Disabled)

Byte

D7D6D5D4D3D2D1D0

565RGB

Odd

R7R6R5R4R3G7G6G5

Even

G4G3G2B7B6B5B4B3

555RGB

Odd

0 R7R6R5R4R3G7G6

Even

G5G4G3B7B6B5B4B3

444xRGB

Odd

R7R6R5R4G7G6G5G4

Even

B7B6B5B4 0 0 0 0

x444RGB

Odd

0 0 0 0 R7R6R5R4

Even

G7G6G5G4B7B6B5B4

Table 10:

2-Byte Bayer Format

Byte

Bits Used

Bit Sequence

Odd bytes

8 data bits

D9D8D7D6D5D4D3D2

Even bytes

2 data bits + 6 unused bits

0 0 0 0 0 0 D1D0

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