TDA935x Philips, TDA935x Datasheet - Page 44

• Manufacturer Part Number: TDA935x
• Description: TV Signal Processor-Teletext Decoder with Embedded u-Controller
• Manufacturer: Philips

Philips Semiconductors
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 below:
B
The attribute when set takes effect from the current
position until to the end of the text display defined in
REG4:Text Area End.
CC: The background duration attribute (see Table 18,
Serial Mode 1, bit 8) in combination with the End Of Row
attribute (see Table 18, 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.
U
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 18, 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.
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.
2001 Jan 18
ACKGROUND
NDERLINE
VERLINE
TV signal processor-Teletext decoder with
embedded -Controller
Table 15 Background CLUT mapping
Control Code
00h+1Dh
01h+1Dh
02h+1Dh
03h+1Dh
04h+1Dh
05h+1Dh
06h+1Dh
07h+1Dh
D
URATION
Defined Colour
Magenta
Yellow
Green
White
Black
Cyan
Blue
Red
CLUT Entry
10
11
12
13
14
15
8
9
44
CC: The overline attribute (see Table 18, 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.
E
CC: The number of characters in a row is flexible and can
determined by the end of row attribute (see Table 18,
Serial Mode 1, bit 9). However the maximum number of
character positions displayed is determined by the setting
of the REG2:Text Position Horizontal and REG4:Text Area
End.
NOTE: 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.
F
A fringe (shadow) can be defined around characters. The
fringe direction is individually selectable in any of the
North, South, East and West direction using
REG3:Fringing Control. The colour of the fringe can also
be defined as one of the entries in the CLUT, again using
REG3:Fringing Control.
CC: The fringe attribute (see Table 18, Serial Mode 0, bit
9) is valid from the time set until the end of the row or
otherwise modified.
TXT: The display of fringing in TXT mode is controlled by
the TXT4.SHADOW bit. When set all the alphanumeric
characters being displayed are shadowed, graphics
characters are not shadowed.
M
The attribute effects the background colour being
displayed. Alternate pixels are displayed as the
background colour or video.The structure is offset by 1
RINGING
ND OF
ESHING
R
OW
TDA935X/6X/8X PS/N2 series
Fig.15 South and Southwest Fringing
Tentative Device Specification