adv7174 Analog Devices, Inc., adv7174 Datasheet - Page 20

• Manufacturer Part Number: adv7174
• Description: Chip Scale Pal/ntsc Video Encoder With Advanced Power Management
• Manufacturer: Analog Devices, Inc.

ADV7174/ADV7179
Mode 1: Slave Option HSYNC , BLANK , FIELD
(Timing Register 0 TR0 = X X X X X 0 1 0)
In this mode, the ADV7174/ADV7179 accepts horizontal SYNC
and odd/even FIELD signals. A transition of the FIELD input
HSYNC
HSYNC
BLANK
BLANK
FIELD
FIELD
HSYNC
BLANK
FIELD
HSYNC
BLANK
260
FIELD
522
DISPLAY
DISPLAY
309
523
261
DISPLAY
622
DISPLAY
310
262
524
623
263
311
525
ODD FIELD
624
EVEN FIELD
264
312
1
ODD FIELD
625
265
EVEN FIELD
EVEN FIELD
313
2
ODD FIELD
1
EVEN FIELD
266
3
314
Figure 24. Timing Mode 1 (NTSC)
2
ODD FIELD
Figure 25. Timing Mode 1 (PAL)
267
4
315
Rev. A | Page 20 of 52
268
3
VERTICAL BLANK
5
VERTICAL BLANK
316
VERTICAL BLANK
VERTICAL BLANK
269
4
6
317
when HSYNC is low indicates a new frame, i.e., vertical retrace.
The BLANK signal is optional. When the BLANK input is
disabled, the ADV7174/ADV7179 automatically blanks all
normally blank lines as per CCIR-624. Mode 1 is illustrated in
Figure 24 (NTSC) and Figure 25 (PAL).
270
7
5
318
271
8
6
319
272
9
7
320
273
10
274
11
21
334
22
283
20
335
DISPLAY
23
284
DISPLAY
21
336
DISPLAY
DISPLAY
285
22