adv7322 Analog Devices, Inc., adv7322 Datasheet - Page 53

• Manufacturer Part Number: adv7322
• Description: Multiformat 11-bit Hdtv Video Encoder
• Manufacturer: Analog Devices, Inc.

Preliminary Technical Data
SD Brightness Detect
[Subaddress 0x7A]
The ADV7322 allows monitoring of the brightness level of the
incoming video data. Brightness detect is a read-only register.
Double Buffering
[Subaddress 0x13, Bit 7; Subaddress 0x48, Bit 2]
Double buffered registers are updated once per field on the
falling edge of the VSYNC signal. Double buffering improves
the overall performance since modifications to register settings
will not be made during active video, but takes effect on the
start of the active video.
100 IRE
0 IRE
NTSC WITHOUT PEDESTAL
VALUE ADDED
NO SETUP
Figure 68. Examples of Brightness Control Values
Rev. PrA | Page 53 of 88
POSITIVE SETUP
VALUE ADDED
Double buffering can be activated on the following HD
registers: HD Gamma A and Gamma B curves and HD CGMS
registers.
Double buffering can be activated on the following SD registers:
SD Gamma A and Gamma B curves, SD Y Scale, SD U Scale, SD
V Scale, SD Brightness, SD Closed Captioning, and SD
Macrovision Bits 5 to 0.
NEGATIVE SETUP
VALUE ADDED
+7.5 IRE
–7.5 IRE
ADV7322