Datasheet

TVP5158, TVP5157, TVP5156
SLES243G –JULY 2009–REVISED APRIL 2013 www.ti.com
Table 4-15. Luminance Contrast
Subaddress 11h
Default 80h
7 6 5 4 3 2 1 0
Contrast [7:0]
Contrast [7:0]
This register works for the luminance. See subaddress 12h.
0000 0000 0 (minimum contrast)
1000 0000 128 (default)
1111 1111 255 (maximum contrast)
The total luminance gain relative to the nominal luminance gain as a function of the Contrast [7:0] setting is as follows:
Luminance Gain = (nominal_luminance_gain) × [Contrast[7:0] / 64 / (2
MC
) + M
C
- 1]
Where M
C
is the contrast multiplier setting in the Brightness and Contrast Range Extender register at I
2
C subaddress 12h.
Table 4-16. Brightness and Contrast Range Extender
Subaddress 12h
Default 00h
7 6 5 4 3 2 1 0
Contrast
Reserved Brightness multiplier [3:0]
multiplier
Contrast multiplier [4] (M
C
)
Increases the contrast control range.
0 2x contrast control range (default), Gain = n/64 – 1 where n is the contrast control and 64 ≤ n ≤255
1 Normal contrast control range, Gain = n/128 where n is the contrast control and 0 ≤ n ≤ 255
Brightness multiplier [3:0] (M
B
)
Increases the brightness control range from 1x to 16x.
0h 1x (default)
1h 2x
3h 4x
7h 8x
Fh 16x
NOTE: The brightness multiplier should be set to 3h for 8-bit outputs.
Table 4-17. Chrominance Saturation
Subaddress 13h
Default 80h
7 6 5 4 3 2 1 0
Saturation [7:0]
Saturation [7:0]
This register works for the chrominance.
0000 0000 0 (no color)
1000 0000 128 (default)
1111 1111 255 (maximum)
The total chrominance gain relative to the nominal chrominance gain as a function of the Saturation [7:0] setting is as follows:
Chrominance Gain = (nominal_chrominance_gain) × (Saturation[7:0] / 128)
50 Internal Control Registers Copyright © 2009–2013, Texas Instruments Incorporated
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