ADV7180WBSTZ datasheet(89/120 Pages) AD

89 / 120 page

Data Sheet

ADV7180

Rev. G | Page 89 of 120

Subaddress

Bit Description

Bits

(Shading Indicates Default State)

Comments

Notes

0x27

Pixel delay

control

LTA[1:0]; luma timing

adjust allows the user to

specify a timing difference

between chroma and

luma samples

No delay

CVBS mode

LTA[1:0] = 00b,

S-Video mode

LTA[1:0] = 01b,

YPrPb mode

LTA[1:0] = 01b

Luma one clock (37 ns) late

Luma two clocks (74 ns) early

Luma one clock (37 ns) early

Reserved

Set to 0

CTA[2:0]; chroma

timing adjust allows

a specified timing

difference between

the luma and chroma

samples

Not a valid setting

CVBS mode

CTA[2:0] = 011b,

S-Videomode

CTA[2:0]= 101b,

YPrPb mode

CTA[2:0] = 110b

Chroma + two pixels (early)

Chroma + one pixel (early)

No delay

Chroma − one pixel (late)

Chroma − two pixels (late)

Chroma − three pixels (late)

Not a valid setting

AUTO_PDC_EN;

automatically programs

the LTA/CTA values so

that luma and chroma are

aligned at the output for

all modes of operation

Use values in LTA[1:0] and CTA[2:0]

for delaying luma/chroma

LTA and CTA values determined

automatically

SWPC; allows the Cr and

Cb samples to be swapped

No swapping

Swap the Cr and Cb output samples

0x2B

Misc gain

control

PW_UPD; peak white

update determines the

rate of gain

Update once per video line

Peak white must

be enabled; see

LAGC[2:0]

Update once per field

Reserved

Set to default

CKE; color kill enable

allows the color kill

function to be switched

on and off

Color kill disabled

For SECAM color

kill, the threshold is

set at 8%; see

CKILLTHR[2:0]

Color kill enabled

Reserved

Set to default

0x2C

AGC mode

control

CAGC[1:0]; chroma auto-

matic gain control selects

the basic mode of

operation for the AGC in

the chroma path

Manual fixed gain

Use CMG[11:0]

Use luma gain for chroma

Automatic gain

Based on color burst

Freeze chroma gain

Reserved

Set to 1

LAGC[2:0]; luma auto

matic gain control selects

the mode of operation for

the gain control in the

luma path

Manual fixed gain

Use LMG[11:0]

Peak white algorithm off

Blank level to

sync tip

Peak white algorithm on

Blank level to

sync tip

Reserved

Freeze gain

Reserved

Set to 1

0x2D

Chroma Gain

Control 1,

Chroma Gain1

(CG)

CMG[11:8]/CG[11:8]; in

manual mode, the chroma

gain control can be used to

program a desired manual

chroma gain; in auto mode,

it can be used to read back

the current gain value

CAGC[1:0] settings

decide in which

mode CMG[11:0]

operates

Reserved

Set to 1

CAGT[1:0]; chroma auto

matic gain timing allows

adjustment of the chroma

AGC tracking speed

Slow (TC = 2 sec)

Has an effect only

if CAGC[1:0] is set

to autogain (10)

Medium (TC = 1 sec)

Reserved

Adaptive

ADV7180WBSTZ Datasheet(PDF) 89 Page - Analog Devices

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