ADV7311KST Analog Devices Inc, ADV7311KST Datasheet - Page 46

• Manufacturer Part Number: ADV7311KST
• Description: IC VID ENC 6-12BIT DAC'S 64LQFP
• Manufacturer: Analog Devices Inc
• Type: Video Encoderr

Specifications of ADV7311KST

• Rohs Status: RoHS non-compliant
• Applications: DVD, SD/HD
• Voltage - Supply, Analog: 2.5V
• Voltage - Supply, Digital: 2.5V
• Mounting Type: Surface Mount
• Package / Case: 64-LQFP
• Input Format: Digital
• Output Format: Analog
• Supply Voltage Range: 2.375V To 2.625V
• Operating Temperature Range: 0°C To +70°C
• Tv / Video Case Style: LQFP
• No. Of Pins: 64
• Msl: MSL 1 - Unlimited
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

ADV7310/ADV7311
SD Hue Adjust Value
[Subaddress 60h]
The hue adjust value is used to adjust the hue on the composite
and chroma outputs.
These eight bits represent the value required to vary the hue of
the video data, i.e., the variance in phase of the subcarrier during
active video with respect to the phase of the subcarrier during
the color burst. The ADV7310/ADV7311 provides a range of
adjustment), this register is set to 80h. FFh and 00h represent the
upper and lower limits (respectively) of adjustment attainable.
(Hue Adjust) [
hue adjust value.
For example, to adjust the hue by +4
Adjust Value register:
*rounded to the nearest integer
To adjust the hue by –4
register:
*rounded to the nearest integer
SD Brightness Control
[Subaddress 61h]
The brightness is controlled by adding a programmable setup
level onto the scaled Y data. This brightness level may be added
onto the scaled Y data. For NTSC with pedestal, the setup can
vary from 0IRE to 22.5IRE. For NTSC without pedestal and
PAL, the setup can vary from –7.5IRE to +15IRE.
The brightness control register is an 8-bit register. Seven bits of
this 8-bit register are used to control the brightness level. This
brightness level can be a positive or negative value.
For example:
Standard: NTSC with Pedestal.
To add +20IRE brightness level, write 28h to Address 61h,
SD brightness.
22.5
o
increments of 0.17578125
[
[
[
SD BrightnessValue
20 2.015631
IREValue






o
] = 0.17578125
0 17578125
0 17578125
×
.
.
−
4
4
×
o
, write 69h to the Hue Adjust Value
2.015631
]

 +


 +

h
100 IRE
=
128 105
128 105
o
0 IRE
]
[
× (HCR
h
40.31262
o
. For normal operation (zero
=
=
=
]
h
o
, write 97h to the Hue
NTSC WITHOUT PEDESTAL
=
Figure 39. Examples of Brightness Control Values
VALUE ADDED
d
* d
d
NO SETUP
*
– 128), for positive
]
=
=
h
97
69
=
h
h
28
h
POSITIVE SETUP
VALUE ADDED
–46–
Standard: PAL.
To add –7IRE brightness level, write 72h to Address 61h,
SD brightness.
Setup
Level In
NTSC with
Pedestal
22.5 IRE
15 IRE
7.5 IRE
0 IRE
*Values in the range from 3Fh to 44h might result in an invalid output signal.
SD Brightness Detect
[Subaddress 7Ah]
The ADV7310/ADV7311 allow monitoring of the brightness
level of the incoming video data. Brightness detect is a read-only
register.
Double Buffering
[Subaddress 13h, Bit 7; Subaddress 48h, 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 take effect on the start
of the active video.
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 5–0.
[
[
[
7 2.015631
0001110
IREValue
×
NEGATIVE SETUP
VALUE ADDED
Table X. Brightness Control Values*
]
into twos complement
×
Setup
Level In
NTSC No
Pedestal
15 IRE
7.5 IRE
0 IRE
–7.5 IRE
2.015631
]
=
[
14.109417
+7.5 IRE
–7.5 IRE
]
=
Level In
PAL
15 IRE
7.5 IRE
0 IRE
–7.5 IRE
Setup
]
=
=
0001110
[
1110010
b
]
SD
Brightness
1Eh
0Fh
00h
71h
b
=
72
REV. A
h