ADV7181BCP Analog Devices Inc, ADV7181BCP Datasheet - Page 78

• Manufacturer Part Number: ADV7181BCP
• Description: IC VIDEO DECODER NTSC 64-LFCSP
• Manufacturer: Analog Devices Inc
• Type: Video Decoderr

Specifications of ADV7181BCP

• Applications: Recorders, Set-Top Boxes
• Voltage - Supply, Analog: 3.15 V ~ 3.45 V
• Voltage - Supply, Digital: 1.65 V ~ 2 V
• Mounting Type: Surface Mount
• Package / Case: 64-LFCSP
• Adc/dac Resolution: 9b
• Screening Level: Industrial
• Package Type: LFCSP EP
• Pin Count: 64
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With: EVAL-ADV7181BEB - BOARD EVALUATION FOR ADV7181
• Lead Free Status / RoHS Status: Compliant, Contains lead / RoHS non-compliant

ADV7181
Table 185. Registers 0x2D to 0x30
Subaddress
0x2D
0x2E
0x2F
0x30
Register
Chroma
Gain
Control 1
Chroma
Gain
Control 2
Luma Gain
Control 1
Luma Gain
Control 2
Bit Description
CMG[11:8]. Chroma manual
gain can be used to program a
desired manual chroma gain.
Reading back from this register
in AGC mode gives the current
gain.
Reserved.
CAGT[1:0]. Chroma automatic
gain timing allows adjustment of
the chroma AGC tracking speed.
CMG[7:0]. Chroma manual gain
lower 8 bits. See CMG[11:8] for
description.
LMG[11:8]. Luma manual gain
can be used program a desired
manual chroma gain, or to read
back the actual gain value used.
Reserved.
LAGT[1:0]. Luma automatic gain
timing allows adjustment of the
luma AGC tracking speed.
LMG[7:0]. Luma manual gain
can be used to program a
desired manual chroma gain or
read back the actual used gain
value.
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7
0
0
1
1
0
0
0
1
1
x
6
0
1
0
1
0
0
1
0
1
x
5
1
0
1
x
4
1
0
1
x
Bit
3
0
0
x
x
2
1
0
x
x
1
0
0
x
x
0
0
0
x
x
Comments
CAGC[1:0] settings
decide in which
mode CMG[11:0]
operates .
Set to 1
Has an effect only if
CAGC[1:0] is set to
auto gain (10).
Slow (TC = 2 s)
Medium (TC = 1 s)
Fast (TC = 0.2 s)
Adaptive
CMG[11:0] = 750d;
gain is 1 in NTSC
CMG[11:0] = 741d;
gain is 1 in PAL.
LAGC[1:0] settings
decide in which
mode LMG[11:0]
operates.
Set to 1
Only has an effect if
AGC[1:0] is set to
auto gain (001, 010,
011,or 100)
Slow (TC = 2 s)
Medium (TC = 1 s)
Fast (TC = 0.2 s)
Adaptive
LMG[11:0] = 1234d;
gain is 1 in NTSC
LMG[11:0] = 1266d;
gain is 1 in PAL.
Notes
Min value is 0d
(G = –60 dB)
Max value is 3750
(gain = 5).
Min value
NTSC 1024 (G = 0.85)
PAL (G = 0.81)
Max value
NTSC 2468 (G = 2),
PAL = 2532 (G = 2)