Datasheet

ADV7170/ADV7171
Rev. C | Page 22 of 64
Mode 1: Slave Option
HSYNC
,
BLANK
, FIELD
(Timing Register 0 TR0 = X X X X X 0 1 0)
In this mode the ADV7170/ADV7171 accept horizontal SYNC and odd/even FIELD signals. A transition of the FIELD input when
HSYNC
is low 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 1 is illustrated in (NTSC)
and (PAL).
Figure 24
Figure 25
260 261 262 263 264 265 266 267 268 269 270 271 272 273 274
283
284
285
ODD FIELD EVEN FIELD
DISPLAY
DISPLAY
HSYNC
BLANK
FIELD
522 523 524 525
1234
5
678
9
10 11
20 21 22
DISPLAY
DISPLAY
ODD FIELD
EVEN FIELD
BLANK
FIELD
VERTICAL BLANK
VERTICAL BLANK
HSYNC
00221-024
Figure 24. Timing Mode 1 (NTSC)
622 623 624 625 1 2 3 4
5
67
21 22 23
DISPLAY
ODD FIELD
EVEN FIELD
HSYNC
BLANK
FIELD
DISPLAY
309 310 311 312 313 314 315 316
317
318 319
334 335 336
DISPLAY
ODD FIELD
EVEN FIELD
HSYNC
BLANK
FIELD
DISPLAY
320
VERTICAL BLANK
VERTICAL BLANK
00221-025
Figure 25. Timing Mode 1 (PAL)