PCA84C646P PHILIPS [NXP Semiconductors], PCA84C646P Datasheet - Page 51

• Manufacturer Part Number: PCA84C646P
• Description: Microcontrollers for TV tuning control and OSD applications
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
13 COMBINATION OF TWO OR MORE FONT CELLS
The user can combine two (or more) font cells to form a
new higher resolution pattern; see Figs 40, 41, 42 and 43.
Combination of two cells in horizontal direction needs no
special care. All 4 background/shadowing modes are
applicable; see Figs 40 and 41.
However the combination of two cells in a vertical direction
needs the following special care:
1995 Jun 15
Space between two rows should be programmed as ‘0’
(bit 1-0 of Carriage Return Code = 00).
Row 0 in the character ROM is to be used in the
North-west shadowing mode. If this mode is intended for
use by this formed character font, the ROW 0 should
contain the bit pattern of Row 18 of the font above it
(see Figs 42 and 43).
Microcontrollers for TV tuning
control and OSD applications
TO FORM A NEW FONT
Fig.40 Combination of two character cells in horizontal direction to form a new font; without shadowing.
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
10
11 0
51
1
2
3
4
PCA84C646; PCA84C846
5
6
7
8
9
10
MRA849
Preliminary specification
11
0
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17