ADV7174/ADV7179
BLANK
HSYNC BLANK
, FIELD
Mode 3: Master/Slave Option
,
that is, vertical retrace. The
signal is optional. When
BLANK
the
input is disabled, the ADV7174/ADV7179
(Timing Register 0 TR0 = X X X X X 1 1 0 or X X X X X 1 1 1)
automatically blanks all normally blank lines as per CCIR-624.
Mode 3 is illustrated in Figure 31 (NTSC) and Figure 32 (PAL).
In this mode, the ADV7174/ADV7179 accepts or generates
horizontal SYNC and odd/even FIELD signals. A transition of
HSYNC
the FIELD input when
is high indicates a new frame,
DISPLAY
DISPLAY
VERTICAL BLANK
522
523
524
525
1
2
3
4
6
7
10
11
20
21
22
5
9
8
HSYNC
BLANK
FIELD
EVEN FIELD
ODD FIELD
DISPLAY
DISPLAY
VERTICAL BLANK
283
285
284
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
HSYNC
BLANK
FIELD
ODD FIELD EVEN FIELD
Figure 31. Timing Mode 3 (NTSC)
DISPLAY
DISPLAY
VERTICAL BLANK
622
623
624
625
1
2
3
4
6
7
22
23
5
21
HSYNC
BLANK
FIELD
EVEN FIELD
ODD FIELD
DISPLAY
DISPLAY
VERTICAL BLANK
318
334
335
336
309
310
311
312
314
315
316
317
319
320
313
HSYNC
BLANK
FIELD
ODD FIELD
EVEN FIELD
Figure 32. Timing Mode 3 (PAL)
Rev. B | Page 24 of 52
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