ADV7175 View Datasheet(PDF) - Analog Devices

Part Name

Description

Manufacturer

ADV7175

Integrated Digital CCIR-601 YCrCb to PAL/NTSC Video Encoder

Analog Devices 

ADV7175/ADV7176

HSYNC

VSYNC

BLANK

PAL = 12 * CLOCK/2

NTSC = 16 * CLOCK/2

PAL = 864 * CLOCK/2

NTSC = 858 * CLOCK/2

PIXEL

DATA

LINE 265

PAL = 132 * CLOCK/2

NTSC = 118 * CLOCK/2

LINE 266

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).

DISPLAY

VERTICAL BLANK

DISPLAY

522 523 524 525

1

2

3

4

5

6

7

8

9

10

11

HSYNC

BLANK

FIELD

EVEN FIELD ODD FIELD

DISPLAY

VERTICAL BLANK

20

21

22

DISPLAY

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

HSYNC

BLANK

FIELD

ODD FIELD EVEN FIELD

Figure 24. Timing Mode 3 (NTSC)

283 284 285

–14–

REV. A

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