PCA84C646 Philips Semiconductors, PCA84C646 Datasheet - Page 54

• Manufacturer Part Number: PCA84C646
• Description: Microcontrollers for TV tuning control and OSD applications
• Manufacturer: Philips Semiconductors

Philips Semiconductors
1995 Jun 15
Microcontrollers for TV tuning
control and OSD applications
(1) The bit pattern of Row 18 of the upper character is equal to that of Row 0 of the lower character.
(2) Due to the situation of (1), in the North-west shadowing mode a gap in the shadow is avoided.
Fig.43 Combination of two characters in vertical direction to formulate a new pattern;
10
11
12
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18
10
11
12
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18
Character pattern stored in the ROM/RAM
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0 1 2 3 4 5 6 7 8 9 10 11
0 1 2 3 4 5 6 7 8 9 10 11
contents Row 18 (upper cell) equal to contents of Row 1(lower cell).
(1)
Cell boundary
54
Character pattern displayed on the screen
10
11
12
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14
15
16
17
10
11
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17
0
1
2
3
4
5
6
7
8
9
0
1
2
3
4
5
6
7
8
9
0 1 2 3 4 5 6 7 8 9 10 11
0 1 2 3 4 5 6 7 8 9 10 11
PCA84C646; PCA84C846
MED225
Preliminary specification
(2)