ADV7175/ADV7176

REV. A

–11–

Mode 1: Slave Option. HSYNC, BLANK, FIELD.

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

In this mode the ADV7175/ADV7176 accepts horizontal SYNC and Odd/Even FIELD signals. A transition of the FIELD input

when HSYNC is low indicates a new frame, i.e., vertical retrace. The BLANK signal is optional. When the BLANK input is disabled

the ADV7175/ADV7176 automatically blanks all normally blank lines as per CCIR-624. Mode 1 is illustrated in Figure 17 (NTSC)

and Figure 18 (PAL).

260

261

262

263

264

265

266

267

268

269

270

271

272

273

274

283

284

285

ODD FIELD

EVEN FIELD

DISPLAY

DISPLAY

VERTICAL BLANK

HSYNC

BLANK

FIELD

522

523

524

525

1

234

5

67

8

9

10

11

20

21

22

DISPLAY

DISPLAY

VERTICAL BLANK

ODD FIELD

EVEN FIELD

HSYNC

BLANK

FIELD

Figure 17. Timing Mode 1 (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

DISPLAY

VERTICAL BLANK

ODD FIELD

EVEN FIELD

HSYNC

BLANK

FIELD

DISPLAY

320

Figure 18. Timing Mode 1 (PAL)