ADV7181BBCPZ datasheet(77/96 Pages) AD

77 / 96 page

ADV7181B

Rev. 0 | Page 77 of 96

Bits

Subaddress

Bit Description

210

Comments

Notes

No Delay

Luma 1 clk (37 nS) delayed

Luma 2 clk (74 nS) early

LTA[1:0]. Luma timing adjust allows

the user to specify a timing difference

between chroma and luma samples.

Luma 1 clk (37 nS) early

CVBS mode

LTA[1:0] = 00b;

S-Video mode

LTA[1:0]= 01b,

YPrPb mode

LTA[1:0] = 01b

Reserved

Set to Zero

Not valid setting

Chroma +2 pixels (early)

Chroma +1 pixel (early)

No delay

Chroma -1 pixel (late)

Chroma -2 pixels (late)

Chroma -3 pixels (late)

CTA[2:0]. Chroma timing adjust

allows a specified timing difference

between the luma and chroma

samples

Not valid setting

CVBS mode

CTA[2:0] = 011b

S-Video mode

CTA[2:0] = 101b

YPrPb mode

CTA[2:0] = 110b

Use values in LTA[1:0] and

CTA[2:0] for delaying

luma/chroma

AUTO_PDC_EN. Automatically

programs the LTA/CTA values so

that luma and chroma are aligned at

the output for all modes of

operation.

LTA and CTA values

determined automatically

No Swapping

0x27

Pixel Delay

Control

SWPC. Allows the Cr and Cb samples

to be swapped.

Swap the Cr and Cb O/P

samples

See

Swap_CR_CB_WB,

Addr 0x89

0x2B

Update once per video

line

PW_UPD. Peak white update

determines the rate of gain.

Update once per field

Peak white must be

enabled. See

LAGC[2:0]

Reserved

Set to default

Color kill disabled

CKE. Color kill enable allows the

color kill function to be switched on

and off.

Color kill enabled

For SECAM color kill,

threshold is set at

See CKILLTHR[2:0]

Misc Gain

Control

Reserved

Set to default

Manual fixed gain

Use CMG[11:0]

Use luma gain for chroma

Automatic gain

Based on color burst

CAGC[1:0]. Chroma automatic gain

control selects the basic mode of

operation for the AGC in the chroma

path.

Freeze chroma gain

Reserved

Set to 1

Manual fixed gain

Use LMG[11:0]

AGC no override through

peak white. Man IRE

control.

Blank level to sync

tip

AGC auto-override

through peak white. Man

IRE control.

Blank level to sync

tip

AGC no override through

peak white. Auto IRE

control.

Blank level to sync

tip

AGC auto-override through

peak white. Auto IRE

control.

Blank level to sync

tip

AGC active video with

peak white

AGC active video with

average video

LAGC[2:0]. Luma automatic gain

control selects the mode of

operation for the gain control in the

luma path.

Freeze gain

0x2C

AGC Mode

Control

Reserved

Set to 1

ADV7181BBCPZ Datasheet(PDF) 77 Page - Analog Devices

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