Bit1 Address Register Bit Description 7 6 5 4 3 2 1 0 Comments Notes 0 " />
參數(shù)資料
型號: ADV7184BSTZ
廠商: Analog Devices Inc
文件頁數(shù): 101/112頁
文件大?。?/td> 0K
描述: IC DECODER VID SDTV MULTI 80LQFP
標準包裝: 1
類型: 視頻解碼器
應(yīng)用: 投影儀,錄音機,安全
電壓 - 電源,模擬: 3.15 V ~ 3.45 V
電壓 - 電源,數(shù)字: 1.65 V ~ 2 V
安裝類型: 表面貼裝
封裝/外殼: 80-LQFP
供應(yīng)商設(shè)備封裝: 80-LQFP(14x14)
包裝: 托盤
ADV7184
Rev. A | Page 89 of 112
Bit1
Address
Register
Bit Description
7 6 5 4 3 2 1 0 Comments
Notes
0 0 0
Not a valid setting
0 0 1
Chroma + two pixels (early)
0 1 0
Chroma + one pixel (early)
0 1 1
No delay
1 0 0
Chroma one pixel (delayed)
1 0 1
Chroma two pixels (delayed)
1 1 0
Chroma three pixels (delayed)
CTA [2:0]. Chroma timing adjust. These bits
allow a specified timing difference between
the luma and chroma samples.
1 1 1
Not a valid setting
CVBS mode CTA [2:0] = 011b.
S-video mode CTA [2:0] = 101b.
YPrPb mode CTA [2:0] = 110b.
0
Use values in LTA [1:0] and CTA [2:0]
for delaying luma and chroma
AUTO_PDC_EN. This bit automatically
programs the LTA/CTA values to align luma
and chroma at the output for all modes of
operation.
1
LTA and CTA values determined
automatically
0
No swapping
SWPC. This bit allows the Cr and Cb samples
to be swapped.
1
Swap the Cr and Cb output samples
0 Update once per video line
PW_UPD. Peak white update. This bit
determines the rate of gain change.
1 Update once per field
Peak white must be enabled (see
LAGC [2:0]).
Reserved.
1 0 0 0 0
Set to default
0
Color kill disabled
CKE. Color-kill enable. This bit allows the
color-kill function to be switched on and off.
1
Color kill enabled
For SECAM color kill, threshold is set at
8% (see CKILLTHR [2:0]).
0x2B
Miscellaneous
Gain Control
Reserved.
1
Set to default
0 0 Manual fixed gain
Use CMG [11:0].
0 1 Use luma gain for chroma
1 0 Automatic gain
Based on color burst.
CAGC [1:0]. Chroma automatic gain control.
These bits select the basic mode of operation
for the AGC in the chroma path.
1 1 Freeze chroma gain
Reserved.
1 1
Set to 1
0 0 0
Manual fixed gain
Use LMG [11:0].
0 0 1
Reserved
Blank level to sync tip.
0 1 0
AGC peak white algorithm enabled
Blank level to sync tip.
0 1 1
Reserved
1 0 0
AGC peak white algorithm disabled
Blank level to sync tip.
1 0 1
Reserved
1 1 0
Reserved
LAGC [2:0]. Luma automatic gain control.
These bits select the mode of operation for
the gain control in the luma path.
1 1 1
Freeze gain
0x2C
AGC Mode Control
Reserved.
1
Set to 1
CG [11:8]/CMG [11:8]. Chroma manual gain.
These bits can be used to program a desired
manual chroma gain. Reading back from these
bits in AGC mode gives the current gain.
0 1 0 0
CAGC [1:0] must be set to 00 (manual
fixed gain) to use CMG [11:0].
Reserved.
1 1
Set to 1
0 0
Slow (TC = 2 sec)
0 1
Medium (TC = 1 sec)
1 0
Fast (TC = 0.2 sec)
0x2D
Chroma Gain
Control 1
CAGT [1:0]. Chroma automatic gain timing.
These bits allow adjustment of the chroma
AGC tracking speed.
1 1
Adaptive
Has an effect only if CAGC [1:0] is set
to 10 (automatic gain).
0x2E
Chroma Gain
Control 2
CG [7:0]/CMG [7:0]. Lower eight bits of chroma
manual gain. See CG [11:8]/CMG [11:8] for
description.
0 0 0 0 0 0 0 0 CMG [11:0] = 750d, gain is 1 in
NTSC; CMG [11:0] = 741d, gain
is 1 in PAL
Minimum value is 0d (G = 60 dB;
maximum value is 3750d (G = +5 dB).
LG [11:8]/LMG [11:8]. Luma manual gain.
These bits can be used to program a desired
manual chroma gain or to read back the actual
gain value used.
x
LAGC [2:0] settings decide in
which mode LMG [11:0] operates
Reserved.
1 1
Set to 1
0 0
Slow (TC = 2 sec)
0 1
Medium (TC = 1 sec)
1 0
Fast (TC = 0.2 sec)
0x2F
Luma Gain Control 1
LAGT [1:0]. Luma automatic gain timing.
These bits allow adjustment of the luma AGC
tracking speed.
1 1
Adaptive
Has an effect only if LAGC [2:0] is set to
010 or 100 (autogain).
0x30
Luma Gain Control 2
LG [7:0]/LMG [7:0]. Luma manual gain. These
bits can be used to program a desired manual
chroma gain or to read back the actual gain
value used.
x x x x
x
LMG [11:0] = 1128d, gain is 1 in
NTSC; LMG [11:0] = 1222d, gain
is 1 in PAL
Minimum value of NTSC is 1024
(G = 0.90) and of PAL is 1024 (G = 0.84);
Maximum value of NTSC is 4095
(G = 3.63) and of PAL is 4095 (G = 3.35).
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