PCA84C646P PHILIPS [NXP Semiconductors], PCA84C646P Datasheet - Page 49
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PCA84C646P
Manufacturer Part Number
PCA84C646P
Description
Microcontrollers for TV tuning control and OSD applications
Manufacturer
PHILIPS [NXP Semiconductors]
Datasheet
1.PCA84C646P.pdf
(72 pages)
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Philips Semiconductors
12.5
Derivative Register 35 selects the vertical starting position of the display row.
Table 33 Derivative Register 35 (address 35H)
Table 34 Description of Derivative Register 35 bits
12.6
Derivative Register 36 selects the horizontal starting position of the display row.
Table 35 Derivative Register 36 (address 36H)
Table 36 Description of Derivative Register 36 bits
1995 Jun 15
Microcontrollers for TV tuning
control and OSD applications
7 to 6
7 to 6
BIT
BIT
7
5
4
3
2
1
0
7
5
4
3
2
1
0
Derivative Register 35 (VPOS)
Derivative Register 36 (HPOS)
SYMBOL
SYMBOL
V5
V4
V3
V2
V1
V0
H5
H4
H3
H2
H1
H0
6
6
Reserved.
These 6 bits enable 1 of 64 vertical start positions to be selected for the display row.
The vertical starting position is calculated as follows:
Where (V5 to V0) is the decimal value of the contents of Register 35; (V5 to V0)
Reserved.
These 6 bits enable 1 of 64 horizontal start positions to be selected for the display row.
The horizontal starting position is calculated as follows:
Where (H5 to H0) is the decimal value of the contents of Register 36; (H5 to H0)
VP
HP
=
=
V5
H5
5
5
4
4
V5 to V0
H5 to H0
H4
V4
4
4
+
5
horizontal scan lines
49
OSD clock cycle
V3
H3
3
3
DESCRIPTION
DESCRIPTION
PCA84C646; PCA84C846
H2
V2
2
2
Preliminary specification
V1
H1
1
1
H0
V0
0
0
0.
10.
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