adv7718 Analog Devices, Inc., adv7718 Datasheet - Page 18
![no-image](/images/no-image-200.jpg)
adv7718
Manufacturer Part Number
adv7718
Description
Integrated Digital Ccir-601 Pal/ntsc Video Encoder
Manufacturer
Analog Devices, Inc.
Datasheet
1.ADV7718.pdf
(40 pages)
- Current page: 18 of 40
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ADV7177/ADV7178
Mode 2: Master Option HSYNC, VSYNC, BLANK
(Timing Register 0 TR0 = X X X X X 1 0 1)
In this mode, the ADV7177/ADV7178 can generate horizontal and vertical SYNC signals. A coincident low transition of both HSYNC
and VSYNC inputs indicates the start of an Odd Field. A VSYNC low transition when HSYNC is high indicates the start of an even
field. The BLANK signal is optional. When the BLANK input is disabled, the ADV7177/ADV7178 automatically blanks all normally
blank lines as per CCIR-624. Mode 2 is illustrated in Figure 14 (NTSC) and Figure 15 (PAL). Figure 16 illustrates the HSYNC,
BLANK and VSYNC for an even-to-odd field transition relative to the pixel data. Figure 17 illustrates the HSYNC, BLANK and
VSYNC for an odd-to-even field transition relative to the pixel data.
HSYNC
BLANK
HSYNC
BLANK
VSYNC
VSYNC
622
309
HSYNC
BLANK
VSYNC
DISPLAY
DISPLAY
PIXEL
DATA
623
310
624
311
EVEN FIELD
PAL = 12
NTSC = 16
ODD FIELD
625
312
CLOCK/2
CLOCK/2
313
1
314
2
315
3
ODD FIELD
VERTICAL BLANK
VERTICAL BLANK
EVEN FIELD
316
4
PAL = 132
NTSC = 122
317
5
CLOCK/2
CLOCK/2
318
6
319
7
320
Cb
21
Y
334
22
Cr
DISPLAY
23
335
DISPLAY
336
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