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TDA9351PS/N2 View Datasheet(PDF) - Philips Electronics

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TDA9351PS/N2 Datasheet PDF : 118 Pages
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Philips Semiconductors
TV signal processor-Teletext decoder with
embedded µ-Controller
Tentative Device Specification
TDA935X/6X/8X PS/N2 series
Display Feature Descriptions
FLASH
Flashing causes the foreground colour pixel to be
displayed as the background pixels.The flash frequency is
controlled by software setting and resetting display
register REG0: Status at the appropriate interval.
CC: This attribute is valid from the time set (see Table 18)
until the end of the row or until otherwise modified.
TXT: This attribute is set by the control character ‘flash’
(08h) and remains valid until the end of the row or until
reset by the control character ‘steady’ (09h).
BOXES
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 it is set from the next character
onwards.
In CC text mode the background colour is displayed
regardless of the setting of the box attribute bit. Boxes take
affect only during mixed mode, where boxes are set in this
mode the background colour is displayed. Character
locations where boxes are not set show video/screen
colour (depending on the setting in the display control
register. REG0: Display Control) in stead of the
background colour.
TXT: Two types of boxes exist the Teletext box and the
OSD box. The Teletext box is activated by the ‘start box’
control character (0Bh), Two start box characters are
required begin a Teletext box, with box starting between
the 2 characters. The box ends at the end of the line or
after a ‘end box’ control character.
TXT mode can also use OSD boxes, they are started using
size implying OSD control chracters(BCh/BDh/BEh/BFh).
The box starts after the control character (‘set after’) and
ends either at the end of the row or at the next size
implying OSD character (‘set at’). The attributes flash,
teletext box, conceal, separate graphics, twist and hold
graphics are all reset at the start of an OSD box, as they
are at the start of the row. OSD Boxes are only valid in TV
mode which is defined by TXT5=03h and TXT6=03h.
the ‘double width’ or double size (0Eh/BEh/0Fh/BFh)
enables double width characters. Any two consecutive
combination of ‘double width’ or ‘double size’
(0Eh/BEh/0Fh/Bfh) activates quadruple width characters,
provided quadruple width characters are enabled by
TXT4.Quad Width Enable. Three vertical sizes are
available normal(x1),double(x2),quadruple(x4). The
control characters ‘normal size’ (0Ch/BCh) enable normal
size, the ‘double height’ or ‘double size’
(0Dh/BDh/0Fh/BFh) enable double height characters.
Quadruple height character are achieved by using double
height characters and setting the global attributes
TXT7.Double Height (expand) and TXT7.Bottom/Top.
If double height characters are used in teletext mode,
single height characters in the lower row of the double
height character are automatically disabled.
ITALIC
CC: This attribute is valid from the time set until the end of
the row or otherwise modified. The attribute causes the
character foreground pixels to be offset horizontally by 1
pixel per 4 scan lines (interlaced mode). The base is the
bottom left character matrix pixel. The pattern of the
character is indented as shown in Fig.14.
SIZE
The size of the characters can be modified in both the
horizontal and vertical directions.
CC: Two sizes are available in both the horizontal and
vertical directions. The sizes available are normal (x1),
double (x2) height/width and any combination of these.
The attribute setting is always valid for the whole row.
Mixing of sizes within a row is not possible.
TXT: Three horizontal sizes are available
normal(x1),double(x2),quadruple(x4). The control
characters ‘normal size’ (0Ch/BCh) enables normal size,
2001 Jan 18
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