CH7006C Datasheet, PDF (36/49 Pages) List of Unclassifed Manufacturers – Digital PC to TV Encoder Features

CHRONTEL
CH7006C
Register Descriptions (continued)
Position Overflow Register
Symbol: PO
Address: 08H
Bits: 3
Bit:
7
6
5
4
3
2
1
0
Symbol:
SAV8
HP8
VP8
Type:
R/W
R/W
R/W
Default:
0
0
0
This position overflow register contains the MSB values for the SAV, HP, and VP values, as follows:
• VP8 (bit 0) is the MSB of the vertical position value (see explanation under “Vertical Position Register”).
• HP8 (bit 1) is the MSB of the horizontal position value (see explanation under “Horizontal Position
Register”).
• SAV8 (bit 2) is the MSB of the start of active video value (see explanation under “Start Active Video
Register”).
Black Level Register
Symbol: BLR
Address: 09H
Bits: 8
Bit:
7
6
5
4
3
2
1
0
Symbol: ^BL7
BL6
BL5
BL4
BL3
BL2
BL1
BL0
Type:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default: ⁰
1
1
1
1
1
1
1
This register sets the black level. The luminance data is added to this black level, which must be set between 90 and
208, with the default value being 127. Recommended values for NTSC and PAL-M are 127, 105 for PAL and 100
for NTSC-J.
Horizontal Position Register
Symbol: HPR
Address: 0AH
Bits: 8
Bit:
7
6
5
4
3
2
1
0
Symbol: ^HP7
HP6
HP5
HP4
HP3
HP2
HP1
HP0
Type:
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Default: ⁰
0
0
0
0
0
0
0
The horizontal position register is used to shift the displayed TV image in a horizontal direction (left or right) to
achieve a horizontally centered image on screen. The entire bit field, HP[8:0] is comprised of this register HP[7:0]
plus the MSB value contained in the position overflow register, bit HP8. Increasing this value moves the displayed
image position RIGHT; decreasing this value moves the displayed image position LEFT. Each increment moves the
image position by 4 input pixels.
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