ADV7194KST Analog Devices Inc, ADV7194KST Datasheet - Page 40

• Manufacturer Part Number: ADV7194KST
• Description: IC ENCODER VIDEO EXT-10 80-LQFP
• Manufacturer: Analog Devices Inc
• Type: Video Encoderr

Specifications of ADV7194KST

• Rohs Status: RoHS non-compliant
• Applications: DVD, PC Video, Multimedia
• Voltage - Supply, Analog: 3.3 V ~ 5 V
• Voltage - Supply, Digital: 3.3 V ~ 5 V
• Mounting Type: Surface Mount
• Package / Case: 80-LQFP
• Number Of Dac's: 6
• Adc/dac Resolution: 10b
• Screening Level: Commercial
• Package Type: LQFP
• Pin Count: 80
• For Use With: EVAL-ADV7194EB - BOARD EVAL FOR ADV7194
• Lead Free Status / RoHS Status: Not Compliant

ADV7194
HUE ADJUST CONTROL REGISTER (HCR)
(Address (SR5–SR0) = 20H)
The hue control register is an 8-bit-wide register used to adjust
the hue on the composite and chroma outputs. Figure 80 shows
the operation under control of this register.
HCR BIT DESCRIPTION
Hue Adjust Value (HCR0–HCR7)
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 colorburst. The ADV7194 provides a range of ±22.5° incre-
ments of 0.17578125°. For normal operation (zero adjustment)
this register is set to 80Hex. FFHex and 00Hex represent the
upper and lower limit (respectively) of adjustment attainable.
Hue Adjust [°] = 0.17578125° × (HCR
Adjust Value
Example:
To adjust the hue by +4° write 97
Register:
To adjust the hue by (–4°) write 69
Register:
EXAMPLE
2. Standard: PAL. To add –7 IRE brightness level write 72
1. Standard: NTSC with Pedestal. To add +20 IRE brightness level, write 28
Rounded to the nearest integer.
HCR7
HCR6
(–4/0.17578125) + 128 = 105
(4/0.17578125) + 128 = 151
[Brightness Control Register Value]
HCR5
100 IRE
0 IRE
HUE ADJUST VALUE
HCR4
HCR7 – HCR0
NTSC WITHOUT PEDESTAL
[|IRE Value| × 2.015631] = [7 × 2.015631] = [14.109417] = 0001110
NO SETUP VALUE
ADDED
ZERO MUST BE
WRITTEN TO
HCR3
THIS BIT
h
h
BCR7
BCR7
to the Hue Adjust Control
to the Hue Adjust Control
d
– 128); for positive Hue
[0001110] into two’s complement = 1110010
HCR2
d
d
BCR6
= 97
69
h
= [IRE Value
HCR1
h
h
BCR5
POSITIVE SETUP
VALUE ADDED
WRITE TO BRIGHTNESS
CONTROL REGISTER: 12
HCR0
h
BCR4
into the Brightness Control Register:
BRIGHTNESS VALUE
BCR6 – BCR0
2.015631]
BCR3
BRIGHTNESS CONTROL REGISTERS (BCR)
(Address (SR5–SR0) = 21H)
The brightness control register is an 8-bit-wide register which
allows brightness control. Figure 81 shows the operation under
control of this register.
BCR BIT DESCRIPTION
Brightness Value (BCR0–BCR6)
Seven bits of this 8-bit-wide register are used to control the
brightness level. The brightness is controlled by adding a pro-
grammable setup level onto the scaled Y data. This brightness
level can be a positive or negative value.
The programmable brightness levels in NTSC without pedestal
and PAL are max 15 IRE and min –7.5 IRE, in NTSC with
pedestal max 22.5 IRE and min 0 IRE.
S
Level in
NTSC with
Pedestal
22.5 IRE
15 IRE
7.5 IRE
0 IRE
NOTE
Values in the range from 3F
etup
h
BCR2
h
H
= [20 × 2.015631]
Table VI. Brightness Control Register Value
into the Brightness Control Register:
NEGATIVE SETUP
VALUE ADDED
WRITE TO BRIGHTNESS
CONTROL REGISTER: 6E
BCR1
b
= 72
Setup
Level in
NTSC No
Pedestal
15 IRE
7.5 IRE
0 IRE
–7.5 IRE
h
h
BCR0
to 44
h
h
= [40.31262]
might result in an invalid output signal.
h
b
+7.5 IRE
–7.5 IRE
Setup
Level in
PAL
15 IRE
7.5 IRE
0 IRE
–7.5 IRE
h
= 28
h
Brightness
Control
Register
Value
1E
0F
00
71
h
h
h
h