adv7344 Analog Devices, Inc., adv7344 Datasheet - Page 79

• Manufacturer Part Number: adv7344
• Description: Multiformat Video Encoder Six 14-bit Noise Shaped Video Dacs
• Manufacturer: Analog Devices, Inc.

Mode 3—Master/Slave Option (Subaddress 0x8A = X X X X X 1 1 0 or X X X X X 1 1 1)
In this mode, the ADV7344 accepts or generates horizontal sync and odd/even field signals. When HSYNC is high, a transition of the
field input indicates a new frame, that is, vertical retrace. The ADV7344 automatically blanks all normally blank lines as per CCIR-624.
HSYNC and VSYNC are output in master mode and input in slave mode on the S_VSYNC and S_VSYNC pins, respectively.
HSYNC
HSYNC
FIELD
FIELD
HSYNC
HSYNC
FIELD
FIELD
522
260
HSYNC
VSYNC
DISPLAY
PIXEL
DATA
622
309
DISPLAY
DISPLAY
DISPLAY
523
261
623
310
524
262
624
311
EVEN FIELD
EVEN FIELD
263
525
Figure 110. SD Timing Mode 2 Odd-to-Even Field Transition (Master/Slave)
625
312
264
ODD FIELD
1
ODD FIELD
ODD FIELD
265
EVEN FIELD
313
1
2
EVEN FIELD
266
3
314
NTSC = 122 × CLOCK/2
PAL = 132 × CLOCK/2
2
Figure 111. SD Timing Mode 3, NTSC
Figure 112. SD Timing Mode 3, PAL
ODD FIELD
267
4
315
3
Rev. 0 | Page 79 of 88
268
5
VERTICAL BLANK
VERTICAL BLANK
316
4
VERTICAL BLANK
VERTICAL BLANK
269
6
NTSC = 858 × CLOCK/2
PAL = 864 × CLOCK/2
317
5
270
7
Cb
318
271
6
8
Y
272
319
7
9
Cr
273
10
320
Y
274
11
Cb
21
334
22
283
20
DISPLAY
335
23
284
21
DISPLAY
DISPLAY
336
285
DISPLAY
22
ADV7344