adv7173 Analog Devices, Inc., adv7173 Datasheet - Page 45

• Manufacturer Part Number: adv7173
• Description: With Six Dacs 10 Bits , Color Control And Enhanced Power Management
• Manufacturer: Analog Devices, Inc.

The ADV7172/ADV7173 supports Wide Screen Signaling (WSS) conforming to the standard. WSS data is transmitted on Line 23.
WSS data can only be transmitted when the ADV7172/ADV7173 is 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 71).
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 the Bit C/W07 is set to a Logic “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–Bit 2
Bit 3 is odd parity check of Bit 0–Bit 2
B0 B1 B2 B3
0
1
0
1
0
1
0
1
B4
0
1
B5
0
1
B6
0
1
B7
0
0
1
1
0
0
1
1
500mV
0
0
0
0
1
1
1
1
1
0
0
1
0
1
1
0
Camera Mode
Film Mode
Standard Coding
Motion Adaptive Color Plus
No Helper
Modulated Helper
RESERVED
11.0 s
Aspect Ratio
4:3
14:9
14:9
16:9
16:9
>16:9
14:9
16:9
Aspect Ratio/Format/Position
SEQUENCE
RUN-IN
Format
Full Format
Letterbox
Letterbox
Letterbox
Letterbox
Letterbox
Full Format
Nonapplicable Nonapplicable
START
CODE
WIDE SCREEN SIGNALING
42.5 s
38.4 s
W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13
Position
Nonapplicable
Center
Top
Center
Top
Center
Center
APPENDIX 4
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
ADV7172/ADV7173
ACTIVE
VIDEO