參數(shù)資料
型號(hào): ADV7180
廠商: Analog Devices, Inc.
英文描述: 10-Bit, 4 x Oversampling SDTV Video Decoder
中文描述: 10位,4個(gè)采樣標(biāo)清視頻解碼器
文件頁數(shù): 61/112頁
文件大?。?/td> 1320K
代理商: ADV7180
ADV7180
CCAP
Two bytes of decoded closed caption data are available in the
I
2
C registers. The field information of the decoded CCAP data
can be obtained from the CC_EVEN_FIELD bit (Register 0x78).
CC_CLEAR, Closed Caption Clear, Address 0x78 [0],
User Sub Map, Write Only, Self-Clearing
1—Reinitializes the CCAP readback registers.
CC_AVL, Closed Caption Available, Address 0x78 [0],
User Sub Map, Read Only
0—Closed captioning was not detected.
1—Closed captioning was detected.
Rev. A | Page 61 of 112
CC_EVEN_FIELD, Address 0x78 [1], User Sub Map,
Read Only
Identifies the field from which the CCAP data was decoded.
0—Closed captioning was detected on an odd field.
1—Closed captioning was detected on an even field.
VDP_CCAP_DATA_0, Address 0x79 [7:0], User Sub Map,
Read Only
Decoded Byte 1 of CCAP data.
VDP_CCAP_DATA_1, Address 0x7A [7:0], User Sub Map,
Read Only
Decoded Byte 2 of CCAP data.
0
REFERENCE COLOR BURST
(9 CYCLES)
FREQUENCY = F
= 3.579545MHz
AMPLITUDE = 40 IRE
10.003μs
1
(O7 CYCLES
2 3 4 5 6 7 0 1 2 3 4 5 6 7
P
A
R
I
T
Y
S
T
A
R
T
P
A
R
I
T
Y
VDP_CCAP_DATA_0
33.764μs
10.5 ± 0.25μs
12.91μs
27.382μs
50 IRE
40 IRE
0
VDP_CCAP_DATA_1
Figure 45. CCAP Waveform and Decoded Data Correlation
Table 78. CCAP Readback Registers
1
Signal Name
CCAP_BYTE_1[7:0]
CCAP_BYTE_2[7:0]
1
The register is a readback register; default value does not apply.
Register Location
VDP_CCAP_DATA_0[7:0]
VDP_CCAP_DATA_1[7:0]
Address (User Sub Map)
121
122
0x79
0x7A
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