ADV7184BSTZ Analog Devices Inc, ADV7184BSTZ Datasheet - Page 64

• Manufacturer Part Number: ADV7184BSTZ
• Description: IC DECODER VID SDTV MULTI 80LQFP
• Manufacturer: Analog Devices Inc
• Type: Video Decoderr

Specifications of ADV7184BSTZ

• Applications: Projectors, Recorders, Security
• Voltage - Supply, Analog: 3.15 V ~ 3.45 V
• Voltage - Supply, Digital: 1.65 V ~ 2 V
• Mounting Type: Surface Mount
• Package / Case: 80-LQFP
• Resolution (bits): 10bit
• Adc Sample Rate: 54MSPS
• Power Dissipation Pd: 550mW
• No. Of Input Channels: 12
• Supply Voltage Range: 1.65V To 2V, 3V To 3.6V
• Operating Temperature Range: -40°C To +85°C
• Tv /: RoHS Compliant
• Input Format: Analogue
• Output Format: Digital
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADV7184
I
Teletext
Because teletext is a high data rate standard, the decoded bytes
are available only as ancillary data. However, a TTXT_AVL bit
is provided in I
has detected teletext. Note that the TTXT_AVL bit is a plain
status bit and does not use the protocol identified in the I
Interface section.
TTXT_AVL, Teletext Detected Status Bit,
Address 0x78 [7], User Sub Map, Read Only
0—Teletext was not detected.
1—Teletext was detected.
WST Packet Decoding
For WST only, the VDP decodes the magazine and row address
of WST teletext packets and further decodes the packet’s 8 × 4
hamming coded words. This feature can be disabled by using
the WST_PKT_ DECOD_ DISABLE bit (Bit 3, Register 0x60,
user sub map). This feature is only valid for WST.
Table 78. WST Packet Description
Packet
Header Packet
Text Packets
8/30 (Format 1) packet
8/30 (Format 2) packet
X/26, X/27, X/28, X/29, X/30, X/31
1
2
For X/26, X/28, and X/29, further decoding needs 24 × 18 hamming decoding. Not supported at present.
C READBACK REGISTERS
(X/00)
(X/01 to X/25)
Design Code = 0000 or 0001
UTC
Design Code = 0010 or 0011
PDC
2
C so that the user can check whether the VDP
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
byte
byte
byte
byte
byte
byte
byte
to 10
to 42
byte
to 10
byte
to 10
byte
to 42
byte
byte
byte
byte
byte
to 42
to 23
to 42
to 23
to 42
2
C
th
nd
th
th
nd
nd
rd
nd
rd
nd
byte
byte
byte
byte
byte
byte
byte
byte
byte
byte
Rev. A | Page 64 of 112
WST_PKT_DECOD_DISABLE, Disable Hamming
Decoding of Bytes in WST, Address 0x60 [3], User Sub Map
0—Enables hamming decoding of WST packets.
1 (default)—Disables hamming decoding of WST packets.
For hamming coded bytes, the dehammed nibbles, along with error
information from the hamming decoder, are output as follows:
•
•
Table 77. Explanation of Error Bits
in the Dehammed Output Byte
E [1:0]
00
01
10
11
The types of WST packets that are decoded are described in
Table 78.
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'}
(where Di' is the corrected bit, and Ei represents the error
information).
Error Information
No errors detected
Error in P4
Double error
Single error found and corrected
Output Data Bits
in Nibble
Okay
Okay
Not okay
Okay