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参数资料
型号： ADV7184BSTZ
厂商： Analog Devices Inc
文件页数： 99/112页
文件大小： 0K
描述： IC DECODER VID SDTV MULTI 80LQFP
标准包装： 1
类型： 视频解码器
应用： 投影仪，录音机，安全
电压 - 电源，模拟： 3.15 V ~ 3.45 V
电压 - 电源，数字： 1.65 V ~ 2 V
安装类型： 表面贴装
封装/外壳： 80-LQFP
供应商设备封装： 80-LQFP（14x14）
包装： 托盘
ADV7184
Rev. A | Page 87 of 112
Bit1
Address
Register
Bit Description
7 6 5 4 3 2 1 0 Comments
Notes
FREE_RUN_ACT.
x
1 = free-run mode active
Blue screen output.
STD_FLD_LEN.
x
1 = field length standard
Correct field length found.
INTERLACED.
x
1 = interlaced video detected
Field sequence found.
PAL_SW_LOCK.
x
1 = swinging burst detected
Reliable swinging burst sequence.
Reserved.
0 0
0
Crystal used to derive
28.63636 MHz clock
XTAL_TTL_SEL.
1
External TTL level clock supplied
Analog Control
Internal (Write Only)
Reserved.
0 0 0 0 0
Reserved.
0 0 1 0 Set to default
0
Current sources switched off
CCLEN. Current clamp enable. This bit allows
the user to switch off the current sources in
the analog front end.
1
Current sources enabled
0x14
Analog Clamp
Control
Reserved.
0 0 0
Set to default
Reserved.
x
Set to default
0
Disable digital clamp freeze
DCFE. Digital clamp freeze enable.
1
Enable digital clamp freeze
0 0
Slow (TC = 1 sec)
0 1
Medium (TC = 0.5 sec)
1 0
Fast (TC = 0.1 sec)
DCT [1:0]. Digital clamp timing. These bits
determine the time constant of the digital
fine-clamp circuitry.
1 1
TC dependent on video
0x15
Digital Clamp
Control 1
Reserved.
0
Set to default
0 0 0 0 0 Automatically uses wide notch
filter for poor quality sources and
wideband filter with comb for
good quality input
0 0 0 0 1 Automatically uses narrow notch
filter for poor quality sources and
wideband filter with comb for
good quality input
Decoder selects optimum Y-shaping
filter depending on CVBS quality.
0 0 0 1 0 SVHS 1
0 0 0 1 1 SVHS 2
0 0 1 0 0 SVHS 3
0 0 1 0 1 SVHS 4
0 0 1 1 0 SVHS 5
0 0 1 1 1 SVHS 6
0 1 0 0 0 SVHS 7
0 1 0 0 1 SVHS 8
0 1 0 1 0 SVHS 9
0 1 0 1 1 SVHS 10
0 1 1 0 0 SVHS 11
0 1 1 0 1 SVHS 12
0 1 1 1 0 SVHS 13
0 1 1 1 1 SVHS 14
1 0 0 0 0 SVHS 15
1 0 0 0 1 SVHS 16
1 0 0 1 0 SVHS 17
0x17
Shaping Filter
Control
1 0 0 1 1 SVHS 18 (CCIR 601)
1 0 1 0 0 PAL NN 1
1 0 1 0 1 PAL NN 2
1 0 1 1 0 PAL NN 3
1 0 1 1 1 PAL WN 1
1 1 0 0 0 PAL WN 2
1 1 0 0 1 NTSC NN1
1 1 0 1 0 NTSC NN2
1 1 0 1 1 NTSC NN3
1 1 1 0 0 NTSC WN 1
1 1 1 0 1 NTSC WN 2
1 1 1 1 0 NTSC WN 3
YSFM [4:0]. Selects Y-shaping filter mode
when in CVBS only mode. These bits allow
the user to select a wide range of low-pass
and notch filters.
1 1 1 1 1 Reserved
If one of these modes is selected, the
decoder does not change filter modes.
A fixed filter response (the one
selected) is used regardless of video
quality.
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