
1996 Jan 08
23
Philips Semiconductors
Preliminary specification
Microcontroller for monitor OSD
and auto-sync applications
PCE84C882
10.1.1
C
HARACTER
F
ONT
C
ODE
If bits <9-4> are in the range (00H to 3DH), then this is a
Character Font Code and 1 from 62 customer designed
character fonts can be selected. Bits <3-1> determine the
colour of the character, a choice of 8 colours being
available. Bit <0> determines whether the character blinks
or not. The blinking duty cycle and frequency are
controlled by Derivative Register 33, see Section 12.3.
The format of the Character Font Code is shown in
Table 5.
Table 8
Selection of Foreground colour
Table 9
Selection of Blinking function
10.1.2
C
ARRIAGE
R
ETURN
C
ODE
If bits <9-4> hold 3EH, then this is the Carriage Return
Code. The current display line is terminated (a transparent
pattern appears on the screen) and the next character will
be displayed at the beginning of the next line. Bits <3-2>
select the size of the of the character to be displayed on
the next line. Bits <1-0> determine the spacing between
lines of displayed characters. Spacing is a multiple of the
number of horizontal scan lines. The format of the Carriage
Return Code is shown in Table 6.
T3
(RED)
T2
(GREEN)
T1
(BLUE)
COLOUR
0
0
0
0
1
1
1
1
0
0
1
1
0
0
1
1
0
1
0
1
0
1
0
1
black
blue
green
cyan
red
magenta
yellow
white
T0
BLINKING
0
1
OFF
ON
Table 10
Selection of character size
Note
1.
H is the OSD clock period; V is the number of
horizontal scan lines per dot.
Table 11
Selection of line spacing
10.1.3
S
PACE
C
ODE
If bits <9-4> hold 3FH, then this is the Space Code. A
transparent pattern, equal to one character width, will be
displayed on the screen. Bits <3-1> determine the
background colour of the characters including the Space
Code in Box shadowing mode, but following the Space
Code in North shadowing mode. See Sections 12.4 and
12.3.1 for more details. Background colour selection is the
same as foreground colour selection. Bit <0> is the
End-of-Display bit and indicates the end of display of the
current screen before exhaustion of display RAM (i.e.
before the 64th RAM location). The format of the Space
Code is shown in Table 7.
Table 12
End of display control
T3
T2
CHARACTER DOT SIZE
(1)
0
0
1
1
0
1
0
1
1H/1V
1H/2V
1H/3V
1H/4V
T1
T0
LINE SPACING
0
0
1
1
0
1
0
1
0H line
4H line
8H line
12H line
T0
DISPLAY CONTROL
0
continue display of next character; this
is also the default setting
end of display
1