ADV7177 Analog Devices, ADV7177 Datasheet - Page 16

• Manufacturer Part Number: ADV7177
• Description: Integrated Digital CCIR-601 to PAL/NTSC Video Encoder
• Manufacturer: Analog Devices

Mode 1: Slave Option HSYNC, BLANK, FIELD
(Timing Register 0 TR0 = X X X X X 0 1 0)
In this mode the ADV7177/ADV7178 accepts horizontal SYNC and Odd/Even FIELD signals. A transition of the FIELD input
when HSYNC is low indicates a new frame, i.e., vertical retrace. The BLANK signal is optional. When the BLANK input is dis-
abled, the ADV7177/ADV7178 automatically blanks all normally blank lines. Mode 1 is illustrated in Figure 18 (NTSC) and
Figure 19 (PAL).
ADV7177/ADV7178
BLANK
HSYNC
BLANK
HSYNC
FIELD
FIELD
522
260
DISPLAY
DISPLAY
523
261
ANALOG
524
262
VIDEO
V
H
F
263
525
Figure 17. Timing Mode 0 Data Transitions (Master Mode)
264
ODD FIELD
1
265
EVEN FIELD
2
Figure 18. Timing Mode 1 (NTSC)
EVEN FIELD
266
3
ODD FIELD
267
4
268
5
VERTICAL BLANK
–16–
VERTICAL BLANK
269
6
270
7
271
8
272
9
273
10
274
11
283
20
284
21
DISPLAY
DISPLAY
285
22
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