TDA9554PS datasheet(55/125 Pages) PHILIPS

55 / 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

CHARACTER TABLE

The character table is shown in Table 24:-

Re-deﬁnable Characters

A number of Dynamically Re-definable Characters (DRC) are available. These are mapped onto the normal character

codes, and replace the pre-defined OTP character Rom value.

There are 32 DRCs which occupy character codes 80H to 9FH. Alternatively, These locations can be utilized as 16

special graphics characters. The remapping of the standard OSD to the DRCs is activated when the TXT21.DRCS

ENABLE bit is set. The selection of Normal or Special OSD symbols is defined by the TXT21.OSD PLANES.

Each character is stored in a matrix of 16x16x1 (V x H x planes), this allows for all possible character matrices to be

defined within a single location.

Character code columns (Bits 4-7)

0123456789

1˚

1/2

¿#3

4™

¢%5

6£

7´

8à

(

)

Aè

Bâ

;

[

Cê

Dî

]

Eô

?Oó

Table 24 Closed Caption Character Table

Special Characters are in column 8.

Additional table locations for normal characters

Table locations for normal characters

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