ADV7191_15 datasheet(26/72 Pages) AD

Part #	ADV7191

Description	Video Encoders with Six 10-Bit DACs and 54 MHz Oversampling

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ADV7190/ADV7191

–26–

REV. B

Mode 3: Master/Slave Option

HSYNC, BLANK, FIELD

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

In this mode the ADV7190/ADV7191 accepts or generates Horizontal SYNC and Odd/Even FIELD signals. A transition of the

FIELD input when

HSYNC is high indicates a new frame, i.e., Vertical Retrace. The BLANK signal is optional. When the

BLANK input is disabled the ADV7190/ADV7191 automatically blanks all normally blank lines as per CCIR-624. Mode 3 is illustrated

in Figure 44 (NTSC) and Figure 45 (PAL).

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

283

284

285

ODD FIELD

EVEN FIELD

DISPLAY

VERTICAL BLANK

HSYNC

BLANK

FIELD

522

523

524

525

12

34

5

67

8

9

10

11

20

21

22

DISPLAY

VERTICAL BLANK

ODD FIELD

EVEN FIELD

HSYNC

BLANK

FIELD

Figure 44. Timing Mode 3, NTSC

622

623

624

625

1

2

3

4

5

67

21

22

23

DISPLAY

VERTICAL BLANK

ODD FIELD

EVEN FIELD

HSYNC

BLANK

FIELD

DISPLAY

309

310

311

312

313

314

315

316

317

318

319

334

335

336

320

DISPLAY

VERTICAL BLANK

ODD FIELD

EVEN FIELD

HSYNC

BLANK

FIELD

DISPLAY

Figure 45. Timing Mode 3, PAL

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ADV7191 Datasheet(PDF) 26 Page - Analog Devices

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