Datasheet

ADV7170/ADV7171
Rev. C | Page 25 of 64
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
when
HSYNC
is high indicates a new frame, that is, vertical retrace. The
BLANK
signal is optional. When the
BLANK
input is disabled,
the ADV7170/ADV7171 automatically blank all normally blank lines as per CCIR-624. Mode 3 is shown in (NTSC) and
(PAL).
Figure 31 Figure
32
522 523 524 525 1 2 3 4
5
67
8
9
10 11 20 21 22
DISPLAY
DISPLAY
VERTICAL BLANK
ODD FIELDEVEN FIELD
BLANK
FIELD
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274
283
284
285
DISPLAY
DISPLAY
VERTICAL BLANK
HSYNC
ODD FIELD
BLANK
FIELD
HSYNC
EVEN FIELD
00221-031
Figure 31. Timing Mode 3 (NTSC)
622 623 624 625 1 2 3 4
5
67
21
22 23
DISPLAY DISPLAY
VERTICAL BLANK
ODD FIELDEVEN FIELD
BLANK
FIELD
309 310 311 312 314 315 316 317
318
319 320
334
335 336
DISPLAY
DISPLAY
VERTICAL BLANK
ODD FIELD EVEN FIELD
313
HSYNC
FIELD
HSYNC
BLANK
00221-032
Figure 32. Timing Mode 3 (PAL)