adv7194 Analog Devices, Inc., adv7194 Datasheet - Page 25

• Manufacturer Part Number: adv7194
• Description: Professional Extended-10? Video Encoder With 54 Mhz Oversampling
• Manufacturer: Analog Devices, Inc.

Mode 1: Master Option HSYNC, BLANK, FIELD
(Timing Register 0 TR0 = X X X X X 0 1 1)
In this mode the ADV7194 can generate 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 disabled the
ADV7194 automatically blanks all normally blank lines as per CCIR-624. Pixel data is latched on the rising clock edge follow-
ing the timing signal transitions. Mode 1 is illustrated in Figure 42 (NTSC) and Figure 43 (PAL). Figure 44 illustrates the HSYNC,
BLANK and FIELD for an odd-or-even field transition relative to the pixel data.
Mode 2: Slave Option HSYNC, VSYNC, BLANK
(Timing Register 0 TR0 = X X X X X 1 0 0)
In this mode the ADV7194 accepts Horizontal and Vertical SYNC signals. A coincident low transition of both HSYNC and VSYNC
inputs indicates the start of an Odd Field. A VSYNC low transition when HSYNC is high indicates the start of an Even Field. The
BLANK signal is optional. When the BLANK input is disabled, the ADV7194 automatically blanks all normally blank lines as per
CCIR-624. Mode 2 is illustrated in Figure 45 (NTSC) and Figure 46 (PAL).
HSYNC
HSYNC
BLANK
VSYNC
BLANK
VSYNC
522
260
523
261
HSYNC
BLANK
FIELD
PIXEL
DATA
524
DISPLAY
DISPLAY
262
525
263
NTSC = 16
PAL = 12
1
264
ODD FIELD
EVEN FIELD
CLOCK/2
2
CLOCK/2
265
3
266
4
267
5
268
VERTICAL BLANK
PAL = 132
NTSC = 122
VERTICAL BLANK
6
269
EVEN FIELD
ODD FIELD
7
CLOCK/2
270
CLOCK/2
8
271
9
272
10
273
Cb
11
274
Y
Cr
Y
20
283
ADV7194
DISPLAY
21
284
22
DISPLAY
285