STW8019 datasheet(45/66 Pages) STMICROELECTRONICS

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Control registers

STw8009/STw8019

44/65

If main_chr_del_en = 0 then the delays used are:

main_chr_del[3:0] = 0010 when mode = PAL/NTSC in 4:2:2 format on CVBS.

main_chr_del[3:0] = 0001 when mode = PAL/NTSC in 4:4:4

main_chr_del_en: Enable of luma to chroma delay on the 4:4:4 component outputs.

(*) 0 = disabled (DENC automatically sets this delay)

1 = enabled (chroma to luma delay is programmed by main_chr_del[3:0] bits (Reg

108).

Note:

This delay affects only the component Y/C. The cvbs output remains unaffected. Refer to

Table 20.

main_chr_del[3:0]

main_

chr_ del3

main_

chr_ del2

main_

chr_ del1

main_

chr_ del0

Delay on chroma path with reference to luma

path encoding [One pixel corresponds to

/fpix_clk]

(*)

0010

- 0.5 pixel delay on chroma

0011

- 1 pixel delay on chroma

0100

- 1.5 pixel delay on chroma

0101

- 2 pixel delay on chroma

1100

+ 2.5 pixel delay on chroma

1101

+ 2 pixel delay on chroma

1110

+ 1.5 pixel delay on chroma

1111

+ 1 pixel delay on chroma

Others

0 pixel delay on chroma (reference delay)

Others

+ 0.5 pixel delay on chroma

Chroma Delay Enable

Address: 0x006D

Type: R/W

content

main_chr

_del_en

default

[0]

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