ch7003b-v Chrontel, ch7003b-v Datasheet - Page 39

• Manufacturer Part Number: ch7003b-v
• Description: Ch7003 Digital Pc To Tv Encoder
• 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.
201-0000-023 Rev. 4.2, 4/12/2002
Table 25. Contrast Enhancement Function
000
001
010
011
100
101
110
111
Bit:
Symbol:
Type:
Default:
CE[2:0]
Figure 26: 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
6
Description (all gains limited to 0-255)
out
256
224
192
160
128
96
64
32
= (1/1)*(Yin-0) = Normal Contrast
0
0
5
32
64
out
out
out
out
out
out
out
= (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
2
N9
0
R/W
Symbol: MNE
Address: 13H
Bits: 5
1
N8
R/W
0
CH7003B
0
M8
R/W
0
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