TDA9554PS datasheet(53/125 Pages) PHILIPS

53 / 125 page

2000 Jun 22

Philips Semiconductors

Tentative Device Speciﬁcation

TV signal processor-Teletext decoder with

embedded

µ-Controller

TDA955X/6X/8X PS/N1 series

Display Positioning

The display consists of the Screen Colour covering the

whole screen and the Text Area that is placed within the

visible screen area. The screen colour extends over a

large vertical and horizontal range so that no offset is

needed. The text area is offset in both directions relative to

the vertical and horizontal sync pulses.

SCREEN COLOUR DISPLAY AREA

This area is covered by the screen colour. The screen

colour display area starts with a fixed offset of 8 us from

the leading edge of the horizontal sync pulse in the

horizontal direction. A vertical offset is not necessary.

TEXT DISPLAY AREA

The text area can be defined to start with an offset in both

the horizontal and vertical direction.

The horizontal offset is set in REG2: Text Area Start. The

offset is done in full width characters using TAS<5:0> and

quarter characters using HOP<1:0> for fine setting. The

ROW

Soft Scroll Position

Pointer SSP<3:0> e.g. 6

Soft Scroll Height

SSH<3:0> e.g.4

Start Scroll Row

Stop Scroll Row

Usable for OSD Display

Should not be used for

Usable for OSD Display

Soft Scrolling Area

OSD Display

STS<3:0> e.g. 3

SPS<3:0> e.g. 11

Fig.22 Soft Scroll Area

Closed Captioning data row n

Closed Captioning data row n+1

Closed Captioning data row n+2

Closed Captioning data row n+3

Closed Captioning data row n+4

ROW

P01 NBC

0-63 lines

Visible area

for scrolling

Scroll Area

Offset

row1

row0

row2

row3

row4

row5

row6

row7

row8

row13

row14

Fig.23 CC Text Areas

Horizontal

starts 8 us after the leading edge of H-Sync for 56

us.

Vertical

line 9, ﬁeld 1 (321, ﬁeld 2) with respect to leading

edge of vertical sync (line numbering using 625

Standard).

Table 22 Screen Colour Display Area

Horizontal

Up to 48 full sized characters per row.

Start position setting from 3 to 64 characters from

the leading edge of H-Sync. Fine adjustment in

quarter characters.

Vertical

256 lines (nominal 41- 297).

Start position setting from leading edge of vertical

sync legal values are 4 to 64 lines.

(line numbering using 625 Standard)

Table 23 Text Display Area

Horizontal Sync.

Vertical

Text Area

Screen Colour Area

Text Area Start

µs

Sync.

0.25 char. offset

Text Area End

Screen Colour Offset = 8

µs

Text

Vertical

Offset

6 Lines

Offset

H-Sync delay

Fig.24 Display Area Positioning

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