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參數(shù)資料
| 型號(hào)： | TMC22071AR1C |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | Phono Plug; Leaded Process Compatible:Yes; Gender:Male; Number of Contacts:3 |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQCC68 |
| 封裝： | PLASTIC, LCC-68 |
| 文件頁數(shù)： | 11/24頁 |
| 文件大?。?/td> | 125K |
| 代理商： | TMC22071AR1C |
PRODUCT SPECIFICATION
TMC22071A
11
CVBS Bus Data Formats
The CVBS bus outputs a Genlock Reference Signal (GRS)
along with the 8-bit digital composite video data. The range
of output data versus video input voltage is illustrated in
Figure 7 where sync tip and blanking levels are controlled by
the digital backporch clamp of the TMC22071A. During
horizontal sync, the TMC22071A outputs field identifica-
tion, subcarrier frequency, and subcarrier phase information
on the CVBS bus.
Figure 7. Output Data vs. Input Video Level
Peak Chrominance
Peak Luminance
Back Porch
Burst
65-22071-09
Blanking
Sync Tip
NTSC PAL
FEh
FFh
D2h
CFh
3Ch
40h
03h
03h
Field identification is output on CVBS
2-0
. The LSB,
CVBS
0
, will be LOW during odd fields and HIGH for even
fields. When NTSC operation is selected, CVBS
1-0
count
00,01,10,11 for fields 1 through 4 respectively. When PAL
operation is selected, CVBS
2-0
count 000, 001, 010, etc. to
111 for fields 1 through 8, respectively.
CVBS
3
indicates V-component inversion in PAL. It is HIGH
for NTSC lines (burst 135
°
) and LOW for PAL lines (burst
225
°
)
Subcarrier frequency is sent out in a 24-bit binary represen-
tation in six 4-bit nibbles on CVBS
3-0
. Subcarrier frequency
data, f
23-0
, is identical to the pre-programmed BSEED value
used in the TMC22071A to lock the subcarrier phase-locked
loop to the incoming subcarrier frequency.
Subcarrier phase,
F
23-0
, is also sent out in a 24-bit binary
representation in six 4-bit nibbles on CVBS
3-0
. Bit
F
23
is
the MSB.
Figure 8. Genlock Reference Signal (GRS) Format
Figure 9. CVBS Bus Video Data Format
PXCK
0
1
PIXEL
PIXEL
PIXEL
FIELD IDENTIFICATION
FREQUENCY
PHASE
PIXEL
PIXEL
65-22071-10
f
23:20
f
19:16
f
15:12
f
11:8
f
7:4
f
3:0
f
23:20
f
19:16
f
15:12
f
11:8
f
7:4
f
3:0
2
3
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
GHSYNC
CVBS7:0
PXCK
65-22071-11
PIXEL 0
PIXEL 1
LDV
CVBS7:0
tHO
tXL
tDO
tXV
tPWHPX
tPWHPX
1/fPXCK
GHSYNC
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