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PCA84C646P Datasheet(PDF) 51 Page - NXP Semiconductors

Part # PCA84C646P
Description  Microcontrollers for TV tuning control and OSD applications
PDF  72 Pages
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Manufacturer  PHILIPS [NXP Semiconductors]
Direct Link  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

PCA84C646P Datasheet(HTML) 51 Page - NXP Semiconductors

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1995 Jun 15
51
Philips Semiconductors
Preliminary specification
Microcontrollers for TV tuning
control and OSD applications
PCA84C646; PCA84C846
13 COMBINATION OF TWO OR MORE FONT CELLS
TO FORM A NEW FONT
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:
• 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).
Fig.40 Combination of two character cells in horizontal direction to form a new font; without shadowing.
0
1
2
3
4
5
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8
9
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0
1
2
345
678
910
11
0
123
45
678
910
11
0
1
2
3
4
5
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10
11
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MRA849



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