ADV7175/ADV7176

REV. A

–14–

PAL = 864 * CLOCK/2

NTSC = 858 * CLOCK/2

PAL = 132 * CLOCK/2

NTSC = 118 * CLOCK/2

LINE 265

LINE 266

HSYNC

VSYNC

BLANK

PIXEL

DATA

PAL = 12 * CLOCK/2

NTSC = 16 * CLOCK/2

Cb

Y

Cr

Y

Cb

Figure 23. Timing Mode 2 Odd-to-Even Field Transition

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 ADV7175/ADV7176 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 ADV7175/ADV7176 automatically blanks all normally blank lines as per CCIR-624. Mode 3 is illustrated in

Figure 24 (NTSC) and Figure 25 (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 24. Timing Mode 3 (NTSC)