adv7390 Analog Devices, Inc., adv7390 Datasheet - Page 74

• Manufacturer Part Number: adv7390
• Description: Low Power, Chip Scale 10-bit Sd/hd Video Encoder
• Manufacturer: Analog Devices, Inc.

ADV7390/ADV7391/ADV7392/ADV7393
Mode 1—Master Option (Subaddress 0x8A = X X X X X 0 1 1)
In this mode, the ADV739x can generate horizontal synchronization and odd/even field signals. When HSYNC is low, a transition of the
field input indicates a new frame, that is, vertical retrace. The ADV739x automatically blanks all normally blank lines as per CCIR-624.
Pixel data is latched on the rising clock edge following the timing signal transitions. HSYNC and FIELD are output on the HSYNC and
VSYNC pins, respectively.
Mode 2— Slave Option (Subaddress 0x8A = X X X X X 1 0 0)
In this mode, the ADV739x accepts horizontal and vertical synchronization 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
ADV739x automatically blanks all normally blank lines as per CCIR-624. HSYNC and VSYNC are input on the HSYNC and VSYNC
pins, respectively.
HSYNC
HSYNC
FIELD
FIELD
622
309
DISPLAY
DISPLAY
HSYNC
FIELD
PIXEL
DATA
623
310
624
311
EVEN FIELD
ODD FIELD
625
312
Figure 108. SD Timing Mode 1, Odd/Even Field Transitions (Master/Slave)
ODD FIELD
EVEN FIELD
313
1
Figure 107. SD Timing Mode 1, Slave Option, PAL
314
2
315
3
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VERTICAL BLANK
VERTICAL BLANK
316
4
317
5
318
6
319
7
NTSC = 122 × CLOCK/2
PAL = 132 × CLOCK/2
320
Cb
21
Y
334
22
Cr
Y
DISPLAY
23
335
DISPLAY
336