ADV7170/ADV7171
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 ADV7170/ADV7171 accept or generate horizontal SYNC and odd/even FIELD signals. A transition of the FIELD input
HSYNC BLANK BLANK
when
is high indicates a new frame, that is, vertical retrace. The
signal is optional. When the
input is disabled,
the ADV7170/ADV7171 automatically blank all normally blank lines as per CCIR-624. Mode 3 is shown in Figure 31 (NTSC) and Figure
32 (PAL).
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
313
314
315
316
317
319
320
HSYNC
BLANK
FIELD
ODD FIELD
EVEN FIELD
Figure 32. Timing Mode 3 (PAL)
Rev. C | Page 25 of 64
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