TDA9381PSSLASHN2 datasheet(49/118 Pages) PHILIPS

49 / 118 page

2001 Jan 18

Philips Semiconductors

Tentative Device Speciﬁcation

TV signal processor-Teletext decoder with

embedded

µ-Controller

TDA935X/6X/8X PS/N2 series

Screen and Global Controls

A number of attributes are available that affect the whole

display region, and cannot be applied selectively to

regions of the display.

TV SCAN LINES PER ROW

The number of TV scan lines per field used for each

display row can be defined, the value is independent of the

character size being used. The number of lines can be

either 10/13/16 per display row. The number of TV scan

lines per row is defined TXT21.DISP_LINES<1:0>.

A value of 9 lines per row can be achieved if the display is

forced into 525 line display mode by

TXT17.DISP_FORCE<1:0>, or if the device is in 10 line

mode and the automatic detection circuitry within display

finds 525 line display syncs.

CHARACTER MATRIX (HXV)

There are four different character matrices available, these

are 12x10, 12x13, and 12x16. The selection is made using

TXT21.CHAR_SIZE<1:0> and is independent of the

number of display lines per row.

If the character matrix is less than the number of TV scan

lines per row then the matrix is padded with blank lines. If

the character matrix is greater than the number of TV scan

lines then the character is truncated.

DISPLAY MODES

CC: When attributes superimpose or when boxing (see

Table 18, Serial Mode 0/1, bit 6) is set, the resulting display

depends on the setting of the following screen control

mode bits in REG0:Display Control.

Table 19 Display Modes

TXT: The display mode is controlled by the bits in the TXT5

and TXT6. There are 3 control functions - Text on,

Background on and Picture on. Separate sets of bits are

used inside and outside Teletext boxes so that different

display modes can be invoked. TXT6 is used if the

newsflash (C5) or subtitle (C6) bits in row 25 of the basic

page memory are set otherwise TXT5 is used. This allows

the software to set up the type of display required on

newsflash and subtitle pages (e.g. text inside boxes, TV

picture outside) this will be invoked without any further

software intervention when such a page is acquired.

Display Mode

MOD

Description

Video

0 0

Video mode disables all display

activities and sets the RGB to true

black and VDS to video.

Full Text

0 1

Full Text mode displays screen

colour at all locations not covered by

character foreground or background

colour. The box attribute has no

effect.

Mixed Screen

Colour

1 0

Mixed Screen mode displays screen

colour at all locations not covered by

character foreground, within boxed

areas or, background colour.

Mixed Video

1 1

Mixed Video mode displays video at

all locations not covered by

character foreground, within boxed

areas or, background colour.

Picture On

Text On

Background

Effect

Text mode, black screen

Text mode, background always black

Text mode

Video mode

Mixed text and TV mode

Text mode, TV picture outside text area

Table 20 TXT Display Control Bits

TDA9381PS/N2 Datasheet(PDF) 49 Page - NXP Semiconductors

TDA9381PS/N2 Datasheet(HTML) 49 Page - NXP Semiconductors

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Descarga

Enlace URL