ch7005c Chrontel, ch7005c Datasheet - Page 32

• Manufacturer Part Number: ch7005c
• Description: Digital Pc To Tv Encoder With Macrovisiontm
• Manufacturer: Chrontel

CHRONTEL
PLL Overflow Register
The PLL Overflow Register contains the MSB bits for the ‘M’ and ‘N’ values, which will be described in the PLL-
M and PLL-N registers, respectively. The reserved bits should not be written to.
32
Table 24. Contrast Enhancement Function
CE[2:0]
000
001
010
011
100
101
110
111
Bit:
Symbol:
Type:
Default:
Figure 19: Luma Transfer Function at different contrast enhancement settings.
7
Contrast enhancement gain 3 Y
Contrast enhancement gain 2 Y
Contrast enhancement gain 1 Y
Normal mode Y
Contrast enhancement gain 1 Y
Contrast enhancement gain 2 Y
Contrast enhancement gain 3 Y
Contrast enhancement gain 4 Y
Description (all gains limited to 0-255)
6
out
256
224
192
160
128
96
64
32
= (1/1)*(Yin-0) = Normal Contrast
0
0
5
32
out
out
out
out
out
out
out
64
= (5/4)*(Y
= (9/8)*(Y
= (17/16)*(Y
= (17/16)*(Y
= (9/8)*(Y
= (5/4)*(Y
= (3/2)*(Y
4
Reserved
R/W
0
96
128
in
in
in
in
in
-102) = Enhances Black
-57)
-0)
-0)
-0) = Enhances White
in
in
-30)
-0)
160
3
Reserved
R/W
0
192
224 256
201-0000-025 Rev. 2.9, 6/24/2004
2
N9
0
R/W
Address: 13H
Bits: 5
Symbol: MNE
1
N8
R/W
0
CH7005C
0
M8
R/W
0