参数资料
型号: ADV7183BBSTZ
厂商: Analog Devices Inc
文件页数: 45/100页
文件大小: 0K
描述: IC VIDEO DECODER NTSC 80-LQFP
产品培训模块: Interfacing AV Converters to Blackfin Processors
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
产品目录页面: 788 (CN2011-ZH PDF)
ADV7183B
Rev. B | Page 49 of 100
CGMS Data Registers
CGMS1[7:0], Address 0x96[7:0],
CGMS2[7:0], Address 0x97[7:0],
CGMS3[7:0], Address 0x98[7:0]
223H
Figure 33 shows the bit correspondence between the analog
video waveform and the CGMS1/CGMS2/CGMS3 registers.
CGMS3[7:4] are undetermined and should be masked out by
software.
Closed Caption Data Registers
CCAP1[7:0], Address 0x99[7:0],
CCAP2[7:0], Address 0x9A[7:0]
224H
Figure 34 shows the bit correspondence between the analog
video waveform and the CCAP1/CCAP2 registers.
CCAP1[7] contains the parity bit from the first word.
CCAP2[7] contains the parity bit from the second word.
Refer to the
225H
GDECAD Gemstar Decode Ancillary Data Format,
Address 0x4C[0] section.
01
2
3
4
5
6
7
0
1
2
3
4
5
6
7
0
1
2
3
CGMS2[7:0]
CGMS3[3:0]
CGMS1[7:0]
REF
+100 IRE
+70 IRE
0 IRE
–40 IRE
11.2
μs
49.1ms ± 0.5
μs
CRC SEQUENCE
2.235
μs ± 20ns
04997-033
Figure 33. CGMS Data Extraction
Table 60. CGMS Access Information
Signal Name
Register Location
Address
Register Default Value
CGMS1[7:0]
CGMS 1[7:0]
150d
0x96
Readback only
CGMS2[7:0]
CGMS 2[7:0]
151d
0x97
Readback only
CGMS3[3:0]
CGMS 3[3:0]
152d
0x98
Readback only
0
REFERENCE COLOR BURST
(9 CYCLES)
FREQUENCY = FSC = 3.579545MHz
AMPLITUDE = 40 IRE
1
CCAP1[7:0]
7 CYCLES
OF 0.5035MHz
(CLOCK RUN-IN)
CCAP2[7:0]
2 3 4 5 6 7 0 1 2 3 4 5 67
P
A
R
I
T
Y
S
T
A
R
T
P
A
R
I
T
Y
BYTE 1
BYTE 0
33.764
μs
10.003
μs
10.5 ± 0.25
μs
12.91
μs
27.382
μs
50 IRE
40 IRE
04997
-034
Figure 34. Closed Caption Data Extraction
Table 61. CCAP Access Information
Signal Name
Register Location
Address
Register Default Value
CCAP1[7:0]
153d
0x99
Readback only
CCAP2[7:0]
154d
0x9A
Readback only
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