TDA9554PS datasheet(48/125 Pages) PHILIPS

48 / 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 and Attribute Coding

CC MODE

Character coding is split into character oriented attributes (parallel) and character group coding (serial). The serial

attributes take effect either at the position of the attribute (Set At), or at the following location (Set After) and remain

effective until either modified by a new serial attribute or until the end of the row. A serial attribute is represented as a

space (the space character itself however is not used for this purpose), the attributes that are still active, e.g. overline

and underline will be visible during the display of the space. The default setting at the start of a row is:

• 1x size, flash and italics OFF

• overline and underline OFF

• Display mode = superimpose

• fringing OFF

• background colour duration = 0

• end of row = 0

The coding is done in 12 bit words. The codes are stored sequentially in the display memory. A maximum of 768

character positions can be defined for a single display.

PARALLEL CHARACTER CODING

Bits

Description

0-7

8 bit character code

8-10

3 bits for 8 foreground colours

Mode bit:

0 = Parallel code

Table 17 Parallel Character Coding

TDA9554PS Datasheet(PDF) 48 Page - NXP Semiconductors