ADV7180KCP32Z Analog Devices Inc, ADV7180KCP32Z Datasheet - Page 61
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ADV7180KCP32Z
Manufacturer Part Number
ADV7180KCP32Z
Description
10-bit 4x Oversampling SDTV Decoder
Manufacturer
Analog Devices Inc
Type
Video Decoderr
Datasheet
1.ADV7180BSTZ.pdf
(116 pages)
Specifications of ADV7180KCP32Z
Design Resources
Low Cost Differential Video Receiver Using ADA4851 Amplifier and ADV7180 Video Decoder (CN0060) Low Cost Video Multiplexer for Video Switching Using ADA4853-2 Op Amp with Disable Function (CN0076)
Applications
Digital Cameras, Mobile Phones, Portable Video
Voltage - Supply, Analog
1.71 V ~ 1.89 V
Voltage - Supply, Digital
1.65 V ~ 2 V
Mounting Type
Surface Mount
Package / Case
32-LFCSP
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
ADV7180KCP32Z
Manufacturer:
SEMTECH
Quantity:
13 400
Part Number:
ADV7180KCP32Z
Manufacturer:
ADI/亚德诺
Quantity:
20 000
Part Number:
ADV7180KCP32Z-RL
Manufacturer:
ANALOGDEVICES
Quantity:
20 000
I
Teletext
Because teletext is a high data rate standard, the decoded bytes
are available only as ancillary data. However, a TTXT_AVL bit
has been provided in I
VDP has detected teletext. Note that the TTXT_AVL bit is a
plain status bit and does not use the protocol identified in the
I
TTXT_AVL, Teletext Detected Status, Address 0x78[7],
User Sub Map, Read Only
When TTXT_AVL is 0, teletext was not detected.
When TTXT_AVL is 1, teletext was detected.
WST Packet Decoding
For WST only, the VDP decodes the magazine and row address
of teletext packets and further decodes the packet’s 8 × 4
hamming coded words. This feature can be disabled using the
WST_PKT_DECODE_DISABLE bit (Bit 3, Register 0x60, user
sub map). This feature is valid for WST only.
Table 80. WST Packet Description
Packet
Header Packet (X/00)
Text Packets (X/01 to X/25)
8/30 (Format 1) Packet
Design Code = 0000 or 0001
UTC
8/30 (Format 2) Packet
Design Code = 0010 or 0011
PDC
X/26, X/27, X/28, X/29, X/30, X/31
1
2
2
For X/26, X/28, and X/29, further decoding needs 24 × 18 hamming decoding. Not supported at present.
C Interface section.
C READBACK REGISTERS
2
C so that the user can check whether the
1
Byte
1
2
3
4
5
11
1
2
3
1
2
3
4
11
24
1
2
3
4
11
24
1
2
3
4
st
nd
rd
th
th
st
nd
rd
st
nd
rd
th
st
nd
rd
th
st
nd
rd
th
th
th
th
th
th
to 10
to 42
to 10
to 10
to 42
to 42
to 23
to 42
to 23
to 42
th
nd
th
th
nd
nd
rd
nd
rd
nd
Rev. F | Page 61 of 116
WST_PKT_DECODE_DISABLE, Disable Hamming
Decoding of Bytes in WST, Address 0x60[3], User Sub Map
Setting WST_PKT_DECODE_DISABLE to 0 enables hamming
decoding of WST packets.
Setting WST_PKT_DECODE_DISABLE to 1 (default) disables
hamming decoding of WST packets.
For hamming-coded bytes, the dehammed nibbles are output
along with some error information from the hamming decoder
as follows:
•
•
Table 79. Error Bits in the Dehammed Output Byte
E[1:0]
00
01
10
11
Table 80 describes the WST packets that are decoded.
Description
Magazine number—Dehammed Byte 4
Row number—Dehammed Byte 5
Page number—Dehammed Byte 6
Page number—Dehammed Byte 7
Control bytes—Dehammed Byte 8 to Byte 13
Raw data bytes
Magazine number—Dehammed Byte 4
Row number—Dehammed Byte 5
Raw data bytes
Magazine number—Dehammed Byte 4
Row number—Dehammed Byte 5
Design code—Dehammed Byte 6
Dehammed initial teletext page, Byte 7 to Byte 12
UTC bytes—Dehammed Byte 13 to Byte 25
Raw status bytes
Magazine number—Dehammed Byte 4
Row number—Dehammed Byte 5
Design code—Dehammed Byte 6
Dehammed initial teletext page, Byte 7 to Byte 12
PDC bytes—Dehammed Byte 13 to Byte 25
Raw status bytes
Magazine number—Dehammed Byte 4
Row number—Dehammed Byte 5
Design code—Dehammed Byte 6
Raw data bytes
Input hamming coded byte: {D3, P3, D2, P2, D1, P1, D0, P0}
(bits in decoded order)
Output dehammed byte: {E1, E0, 0, 0, D3', D2', D1', D0'}
(Di' – corrected bits, Ei error information).
Error Information
No errors detected
Error in P4
Double error
Single error found and corrected
Output Data Bits
in Nibble
Okay
Okay
Bad
Okay
ADV7180