ADV7172KST 查看數據表（PDF） - Analog Devices

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ADV7172KST

Digital PAL/NTSC Video Encoder with Six DACs (10 Bits), Color Control and Enhanced Power Management

Analog Devices 

ADV7172/ADV7173

Mode 2: Slave Option HSYNC, VSYNC, BLANK

(Timing Register 0 TR0 = X X X X X 1 0 0)

In this mode the ADV7172/ADV7173 accepts 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 ADV7172/ADV7173 automatically blanks all normally

blank lines as per CCIR-624. Mode 2 is illustrated in Figure 30 (NTSC) and Figure 31 (PAL).

DISPLAY

VERTICAL BLANK

DISPLAY

522 523 524 525

1

HSYNC

BLANK

VSYNC

2

3

4

EVEN FIELD

DISPLAY

5

6

7

8

ODD FIELD

VERTICAL BLANK

9

10

11

20

21

22

DISPLAY

HSYNC

BLANK

VSYNC

260 261 262 263 264 265 266 267 268 269 270 271 272 273 274

ODD FIELD

EVEN FIELD

Figure 30. Timing Mode 2 (NTSC)

283 284 285

DISPLAY

VERTICAL BLANK

DISPLAY

622

623

624

625

1

2

3

4

5

6

7

HSYNC

BLANK

VSYNC

EVEN FIELD

ODD FIELD

DISPLAY

VERTICAL BLANK

21

22

23

DISPLAY

309

310

311 312

313

314

315

316

317

318

319

320

HSYNC

BLANK

VSYNC

ODD FIELD

EVEN FIELD

Figure 31. Timing Mode 2 (PAL)

334

335

336

–20–

REV. B

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