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ADV7180WBSTZ Datasheet(PDF) 68 Page - Analog Devices

Part # ADV7180WBSTZ
Description  10-Bit, 4횞 Oversampling SDTV Video Decoder
PDF  120 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

ADV7180WBSTZ Datasheet(HTML) 68 Page - Analog Devices

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ADV7180
Data Sheet
Rev. G | Page 68 of 120
Each data packet starts immediately after the EAV code of the
preceding line. Figure 50 and Table 86 show the overall structure
of the data packet.
Entries within the packet are as follows:
•
Fixed preamble sequence of 0x00, 0xFF, and 0xFF.
•
DID. The value for the DID marking a Gemstar or CCAP
data packet is 0x140 (10-bit value).
•
SDID, which contains information about the video line
from which data was retrieved, whether the Gemstar
transmission was in 1× or 2× format, and whether it was
retrieved from an even or odd field.
•
Data count byte, giving the number of user data-words that
follow.
•
User data section.
•
Optional padding to ensure that the length of the user
data-word section of a packet is a multiple of four bytes
(requirement as set in ITU-R BT.1364).
•
Checksum byte.
Table 86 lists the values within a generic data packet that is
output by the ADV7180 in 8-bit format.
00
FF
FF
DID
SDID
DATA
COUNT
USER DATA
OPTIONAL PADDING
BYTES
CHECK
SUM
SECONDARY DATA IDENTIFICATION
PREAMBLE FOR ANCILLARY DATA
DATA IDENTIFICATION
USER DATA (4 OR 8 WORDS)
Figure 50. Gemstar- and CCAP-Embedded Data Packet (Generic)
Table 86. Generic Data Output Packet
Byte
D[9]
D[8]
D[7]
D[6]
D[5]
D[4]
D[3]
D[2]
D[1]
D[0]
Description
0
0
0
0
0
0
0
0
0
0
0
Fixed preamble
1
1
1
1
1
1
1
1
1
1
1
Fixed preamble
2
1
1
1
1
1
1
1
1
1
1
Fixed preamble
3
0
1
0
1
0
0
0
0
0
0
DID
4
EP
EP
EF
2X
Line[3:0]
0
0
SDID
5
EP
EP
0
0
0
0
DC[1]
DC[0]
0
0
Data count (DC)
6
EP
EP
0
0
Word1[7:4]
0
0
User data-words
7
EP
EP
0
0
Word1[3:0]
0
0
User data-words
8
EP
EP
0
0
Word2[7:4]
0
0
User data-words
9
EP
EP
0
0
Word2[3:0]
0
0
User data-words
10
EP
EP
0
0
Word3[7:4]
0
0
User data-words
11
EP
EP
0
0
Word3[3:0]
0
0
User data-words
12
EP
EP
0
0
Word4[7:4]
0
0
User data-words
13
EP
EP
0
0
Word4[3:0]
0
0
User data-words
14
CS[8]
CS[8]
CS[7]
CS[6]
CS[5]
CS[4]
CS[3]
CS[2]
0
0
Checksum
Table 87. Data Byte Allocation
2×
Raw Information Bytes Retrieved from the Video Line
GDECAD
User Data-Words
(Including Padding)
Padding Bytes
DC[1:0]
1
4
0
8
0
10
1
4
1
4
0
01
0
2
0
4
0
01
0
2
1
4
2
01



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