ADV7170KS Analog Devices Inc, ADV7170KS Datasheet - Page 42

• Manufacturer Part Number: ADV7170KS
• Manufacturer: Analog Devices Inc

Specifications of ADV7170KS

• Adc/dac Resolution: 10b
• Screening Level: Industrial
• Package Type: MQFP
• Pin Count: 44
• Lead Free Status / RoHS Status: Not Compliant

ADV7170/ADV7171
APPENDIX 4—WIDE SCREEN SIGNALING
The ADV7170/ADV7171 support wide screen signaling (WSS) conforming to the standard. WSS data is transmitted on Line 23.
WSS data can only be transmitted when the ADV7170/ADV7171 are configured in PAL mode. The WSS data is 14 bits long; the function
of each of these bits is as shown below.
The WSS data is preceded by a run-in sequence and a start code (see Figure 58). The bits are output from the configuration registers in
the following order:
C/W20 = W0, C/W21 = W1, C/W22 = W2, C/W23 = W3, C/W24 = W4, C/W25 = W5, C/W26 = W6, C/W27 = W7, C/W10 = W8,
C/W11 = W9, C/W12 = W10, C/W13 = W11, C/W14 = W12, C/W15 = W13.
If Bit C/W07 is set to a Logic Level 1, it enables the WSS data to be transmitted on Line 23. The latter portion of Line 23 (42.5 μs from the
falling edge of HSYNC) is available for the insertion of video.
Function of CGMS Bits
Bit 0 to Bit 2
Bit 3 is odd parity check of Bit 0 to Bit 2
B0
0
1
0
1
0
1
0
1
B4
0
1
B5
0
1
B6
0
1
B7
500mV
B1
0
0
1
1
0
0
1
1
Camera Mode
Film Mode
Standard Coding
Motion Adaptive Color Plus
No Helper
Modulated Helper
RESERVED
B2
0
0
0
0
1
1
1
1
11.0μs
B3
1
0
0
1
0
1
1
0
Aspect Ratio/Format/Position
Aspect Ratio
4:3
14:9
14:9
16:9
16:9
>16:9
14:9
16:9
SEQUENCE
RUN-IN
START
CODE
Format
Full format
Letterbox
Letterbox
Letterbox
Letterbox
Letterbox
Full format
Nonapplicable
42.5μs
38.4μs
W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13
Figure 58. WSS Waveform Diagram
Rev. C | Page 42 of 64
Position
Nonapplicable
Center
Top
Center
Top
Center
Center
Nonapplicable
B9
0
1
0
1
B11
0
1
B12
B13
B10
0
0
1
1
No open subtitles
Subtitles in active image area
Subtitles out of active image area
Reserved
No surround sound information
Surround sound mode
RESERVED
RESERVED
ACTIVE
VIDEO