adv7344 Analog Devices, Inc., adv7344 Datasheet - Page 75

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

APPENDIX 5—SD TIMING
Mode 0 (CCIR-656)—Slave Option (Subaddress 0x8A = X X X X X 0 0 0)
The ADV7344 is controlled by the SAV (start of active video) and EAV (end of active video) time codes embedded in the pixel data. All
timing information is transmitted using a 4-byte synchronization pattern. A synchronization pattern is sent immediately before and after
each line during active picture and retrace. If the S_VSYNC and S_HSYNC pins are not used, they should be tied high during this mode.
Mode 0 (CCIR-656)—Master Option (Subaddress 0x8A = X X X X X 0 0 1)
The ADV7344 generates H and F signals required for the SAV and EAV time codes in the CCIR656 standard. The H bit is output on
S_HSYNC and the F bit is output on S_VSYNC .
H
F
H
F
260
522
DISPLAY
DISPLAY
NTSC/PAL M SYSTEM
523
261
(525 LINES/60Hz)
(625 LINES/50Hz)
INPUT PIXELS
PAL SYSTEM
524
262
ANALOG
VIDEO
263
525
264
Y
END OF ACTIVE
1
ODD FIELD
VIDEO LINE
C
r
Y
265
EVEN FIELD
2
F
F
4 CLOCK
4 CLOCK
EAV CODE
0
0
0
0
266
EVEN FIELD
3
X
Y
8
0
ODD FIELD
267
Figure 101. SD Master Mode 0, NTSC
1
0
4
8
0
Figure 100. SD Slave Mode 0
1
0
268
Rev. 0 | Page 75 of 88
5
VERTICAL BLANK
ANCILLARY DATA
0
0
269
VERTICAL BLANK
268 CLOCK
280 CLOCK
6
F
F
(HANC)
F
F
A
B
270
7
A
B
A
B
271
8
8
0
1
0
272
9
8
0
1
0
SAV CODE
4 CLOCK
F
F
4 CLOCK
START OF ACTIVE
273
10
0
0
VIDEO LINE
0
0
X
Y
274
11
C
b
Y C
1440 CLOCK
1440 CLOCK
r
Y
C
b
Y
283
20
C
r
Y
C
b
284
21
DISPLAY
285
DISPLAY
22
ADV7344