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參數(shù)資料
| 型號(hào)： | ADV7180BCPZ |
| 廠商： | Analog Devices Inc |
| 文件頁(yè)數(shù)： | 50/116頁(yè) |
| 文件大?。?/td> | 0K |
| 描述： | IC VIDEO DECODER SDTV 40-LFCSP |
| 設(shè)計(jì)資源： | Low Cost Differential Video Receiver Using ADA4851 Amplifier and ADV7180 Video Decoder (CN0060) Low Cost Video Multiplexer for Video Switching Using ADA4853-2 Op Amp with Disable Function (CN0076) |
| 標(biāo)準(zhǔn)包裝： | 1 |
| 類型： | 視頻解碼器 |
| 應(yīng)用： | 數(shù)碼相機(jī)，手機(jī)，便攜式視頻 |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 40-VFQFN 裸露焊盤，CSP |
| 供應(yīng)商設(shè)備封裝： | 40-LFCSP-VQ（6x6） |
| 包裝： | 托盤 |
| 產(chǎn)品目錄頁(yè)面： | 788 (CN2011-ZH PDF) |
| 配用： | EVAL-ADV7180LQEBZ-ND - BOARD EVALUATION ADV7180 EVAL-ADV7180LFEBZ-ND - BOARD EVAL FOR ADV7180 LFCSP |
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Data Sheet
ADV7180
Rev. I | Page 39 of 116
CAGT[1:0], Chroma Automatic Gain Timing,
Address 0x2D[7:6]
The chroma automatic gain timing register allows the user to
influence the tracking speed of the chroma automatic gain
control. This register has an effect only if the CAGC[1:0]
register is set to 10 (automatic gain).
Table 45. CAGT Function
CAGT[1:0]
Description
00
Slow (TC = 2 sec)
01
Medium (TC = 1 sec)
10
Reserved
11 (default)
Adaptive
CG[11:0], Chroma Gain, Address 0x2D[3:0],
Address 0x2E[7:0]; CMG[11:0], Chroma Manual Gain,
Address 0x2D[3:0], Address 0x2E[7:0]
Chroma gain[11:0] is a dual-function register. If written to, a
desired manual chroma gain can be programmed. This gain
becomes active if the CAGC[1:0] function is switched to manual
fixed gain. See Equation 2 for calculating a desired gain.
If read back, this register returns the current gain value.
Depending on the setting in the CAGC[1:0] bits, this is either:
The chroma manual gain value (CAGC[1:0] set to chroma
manual gain mode).
The chroma automatic gain value (CAGC[1:0] set to any of
the automatic modes).
Table 46. CG/CMG Function
CG[11:0]/CMG[11:0]
Read/Write
Description
CMG[11:0]
Write
Manual gain for chroma
path
CG[11:0]
Read
Currently active gain
Chroma_Gain
tor
brationFac
ChromaCali
CMG
decimal
]
0
:
11
[
(2)
where ChromaCalibrationFactor is a decimal value between 0
and 4095.
Calculation of the Chroma Calibration Factor
1. Apply a CVBS signal with the color bars/SMPTE bars test
pattern content directly to the measurement equipment.
2. Ensure correct termination of 75 on the measurement
equipment. Measure chroma output levels.
3. Reconnect the source to the CVBS input of the ADV7180
system that has a backend gain of 1. Repeat the
measurement of chroma levels.
4. Turn off the Chroma AGC and manually change the
Chroma Gain Control Register CMG[11:0] until the
chroma level matches that measured directly from the
source.
This value, in decimal, is the chroma calibration factor.
CKE, Color Kill Enable, Address 0x2B[6]
The color kill enable bit allows the optional color kill function
to be switched on or off.
For QAM-based video standards (PAL and NTSC) as well as
FM-based systems (SECAM), the threshold for the color kill
decision is selectable via the CKILLTHR[2:0] bits.
If color kill is enabled and the color carrier of the incoming
video signal is less than the threshold for 128 consecutive video
lines, color processing is switched off (black and white output).
To switch the color processing back on, another 128 consecutive
lines with a color burst greater than the threshold are required.
The color kill option works only for input signals with a modulated
chroma part. For component input (YPrPb), there is no color kill.
Setting CKE to 0 disables color kill.
Setting CKE to 1 (default) enables color kill.
CKILLTHR[2:0], Color Kill Threshold, Address 0x3D[6:4]
The CKILLTHR[2:0] bits allow the user to select a threshold for
the color kill function. The threshold applies only to QAM-based
(NTSC and PAL) or FM-modulated (SECAM) video standards.
To enable the color kill function, the CKE bit must be set. For
Setting 000, Setting 001, Setting 010, and Setting 011, chroma
demodulation inside the ADV7180 may not work satisfactorily
for poor input video signals.
Table 47. CKILLTHR Function
Description
CKILLTHR[2:0]
SECAM
NTSC, PAL
000
No color kill
Kill at <0.5%
001
Kill at <5%
Kill at <1.5%
010
Kill at <7%
Kill at <2.5%
011 (default)
Kill at <8%
Kill at <4%
100
Kill at <9.5%
Kill at <8.5%
101
Kill at <15%
Kill at <16%
110
Kill at <32%
111
Reserved for Analog Devices internal use only;
do not select
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| ADV7180BCPZ-REEL | 功能描述:IC VIDEO DECODER SDTV 40-LFCSP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 產(chǎn)品變化通告:Product Discontinuation 07/Mar/2011 標(biāo)準(zhǔn)包裝:3,000 系列:OMNITUNE™ 類型:調(diào)諧器 應(yīng)用:移動(dòng)電話，手機(jī)，視頻顯示器 安裝類型:表面貼裝 封裝/外殼:65-WFBGA 供應(yīng)商設(shè)備封裝:PG-WFSGA-65 包裝:帶卷 (TR) 其它名稱:SP000365064 |
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| ADV7180BSTZ | 功能描述:IC VIDEO DECODER SDTV 64-LQFP RoHS:是 類別:集成電路 (IC) >> 線性 - 視頻處理 系列:- 標(biāo)準(zhǔn)包裝:250 系列:- 類型:電平移位器 應(yīng)用:LCD 電視機(jī)/監(jiān)控器 安裝類型:表面貼裝 封裝/外殼:28-WFQFN 裸露焊盤 供應(yīng)商設(shè)備封裝:28-WQFN（4x4）裸露焊盤 包裝:帶卷 (TR) 其它名稱:296-32523-2TPS65198RUYT-ND |
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