PCA84C646 Philips Semiconductors, PCA84C646 Datasheet - Page 53

• 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 not 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 might occur.
10
11
12
13
14
15
16
17
18
10
11
12
13
14
15
16
17
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
Fig.42 Combination of two characters in vertical direction to form a new pattern;
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) not equal to contents of Row 1(lower cell).
(1)
Cell boundary
53
Character pattern displayed on the screen
10
11
12
13
14
15
16
17
10
11
12
13
14
15
16
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
Preliminary specification
MED224
(2)