SAA5531 Philips Semiconductors, SAA5531 Datasheet - Page 61

• Manufacturer Part Number: SAA5531
• Description: Enhanced TV microcontrollers with On-Screen Display OSD
• Manufacturer: Philips Semiconductors

Philips Semiconductors
Table 18 Foreground CLUT mapping
19.3.7
CC: This attribute is valid from the time set until end of row
or otherwise modified if set with Serial Mode 0. If set with
Serial Mode 1, then the colour is set from the next
character onwards.
The background colour can be chosen from all 16 CLUT
entries.
TXT: The control character ‘New background’ (1DH) is
used to change the background colour to the current
foreground colour. The selection is immediate (set at) and
remains valid until the end of the row or until otherwise
modified.
The TEXT background control characters map to the
CLUT entries as shown in Table 19:
Table 19 Background CLUT mapping
2000 Feb 23
Enhanced TV microcontrollers with
On-Screen Display (OSD)
CONTROL
CONTROL
00H + 1DH
01H + 1DH
02H + 1DH
03H + 1DH
04H + 1DH
05H + 1DH
06H + 1DH
07H + 1DH
CODE
CODE
00H
01H
02H
03H
04H
05H
06H
07H
B
ACKGROUND COLOUR
DEFINED
COLOUR
DEFINED
COLOUR
magenta
magenta
yellow
yellow
green
green
black
white
black
white
cyan
cyan
blue
blue
red
red
CLUT ENTRY
CLUT ENTRY
10
11
12
13
14
15
0
1
2
3
4
5
6
7
8
9
61
19.3.8
The attribute when set takes effect from the current
position until the end of the text display defined in the MMR
Text Area End.
CC: The background duration attribute (see Table 22,
Serial Mode 1, bit 8) in combination with the End Of Row
attribute (see Table 22, Serial Mode 1, bit 9) forces the
background colour to be display on the row until the end of
the text area is reached.
TXT: This attribute is not available.
19.3.9
The underline attribute causes the characters to have the
bottom scan line of the character cell forced to foreground
colour, including spaces. If background duration is set,
then underline is set until the end of the text area.
CC: The underline attribute (see Table 22, Serial
Mode 0/1, bit 4) is valid from the time set until end of row
or otherwise modified.
TXT: This attribute is not available.
19.3.10 O
The overline attribute causes the characters to have the
top scan line of the character cell forced to foreground
colour, including spaces. If background duration is set,
then overline is set until the end of the text area.
CC: The overline attribute (see Table 22, Serial Mode 0/1,
bit 5) is valid from the time set until end of row or otherwise
modified. Overlining of Italic characters is not possible.
TXT: This attribute is not available.
19.3.11 E
CC: The number of characters in a row is flexible and can
determined by the end of row attribute (see Table 22 Serial
Mode 1, bit 9). However the maximum number of
character positions displayed is determined by the setting
of the MMR Text Position Horizontal and MMR Text Area
End.
Note that when using the end of row attribute the next
character location after the attribute should always be
occupied by a ‘space’.
TXT: This attribute is not available, row length is fixed at
40 characters.
B
U
ACKGROUND DURATION
ND OF
NDERLINE
VERLINE
R
OW
Preliminary specification
SAA55xx