Datasheet

TVP5146M2
SLES141H –JULY 2005– REVISED FEBRUARY 2012 www.ti.com
Table 2-20. Luminance Processing Control 2 Register
Subaddress 07h
Default 00h
7 6 5 4 3 2 1 0
Luma filter select [1:0] Reserved Peaking gain (sharpness) [1:0] Reserved
Luma filter selected [1:0]:
00 = Luminance adaptive comb enable (default on CVBS)
01 = Luminance adaptive comb disable (trap filter selected)
10 = Luma comb/trap filter bypassed (default on S-Video, component mode, and SECAM)
11 = Reserved
Peaking gain (sharpness) [1:0]:
00 = 0 (default)
01 = 0.5
10 = 1
11 = 2
Table 2-21. Luminance Processing Control 3 Register
Subaddress 08h
Default 02h
7 6 5 4 3 2 1 0
Reserved Trap filter select [1:0]
Trap filter select [1:0]:
Selects one of the four trap filters to produce the luminance signal by removing the chrominance signal from the composite video
signal. The stopband of the chroma trap filter is centered at the chroma subcarrier frequency with the stopband bandwidth controlled
by the two control bits.
Trap filter stop band bandwidth (MHz):
Filter select [1:0] NTSC ITU-R 601 PAL ITU-R 601
00 1.2129 1.2129
01 0.8701 0.8701
10 (default) 0.7183 0.7383
11 0.5010 0.5010
Table 2-22. Luminance Brightness Register
Subaddress 09h
Default 80h
7 6 5 4 3 2 1 0
Brightness [7:0]
Brightness [7:0]:
This register works for CVBS and S-Video luminance. See subaddress 2Fh.
0000 0000 = 0 (dark)
1000 0000 = 128 (default)
1111 1111 = 255 (bright)
For composite and S-Video outputs, the output black level relative to the nominal black level (64 out of 1024) as a function of the
Brightness [7:0] setting is as follows.
Black Level = nominal_black_level + (M
B
+ 1) × (Brightness [7:0] – 128)
Where M
B
is the brightness multiplier setting in the Brightness and Contrast Range Extender register at I
2
C subaddress 2Fh.
46 Functional Description Copyright © 2005–2012, Texas Instruments Incorporated
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