adv7174 Analog Devices, Inc., adv7174 Datasheet - Page 21

• Manufacturer Part Number: adv7174
• Description: Chip Scale Pal/ntsc Video Encoder With Advanced Power Management
• 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 ADV7174/ADV7179 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
HSYNC
BLANK
FIELD
PIXEL
DATA
NTSC = 16 u CLOCK/2
PAL = 12 u CLOCK/2
Figure 26. Timing Mode 1 Odd/Even Field Transitions Master/Slave
Rev. A | Page 21 of 52
is disabled, the ADV7174/ADV7179 automatically blanks all
normally blank lines as per CCIR-624. Pixel data is latched on
the rising clock edge following the timing signal transitions.
Mode 1 is illustrated in Figure 24 (NTSC) and Figure 25 (PAL).
Figure 26 illustrates the HSYNC , BLANK , and FIELD for an
odd or even field transition relative to the pixel data.
PAL = 132 u CLOCK/2
NTSC = 122 u CLOCK/2
Cb
Y
Cr
ADV7174/ADV7179
Y