SDA55XX Datasheet, PDF (11/230 Pages) Infineon Technologies AG – Preliminary & Confidential

SDA 55xx
Preliminary & Confidential
Overview
1.4
Introduction
The SDA 55xx is a single chip teletext decoder for decoding World System Teletext data
as well as Video Programming System (VPS), Program Delivery Control (PDC), and
Wide Screen Signalling (WSS) data used for PAL plus transmissions (line 23).
The device provides an integrated general-purpose, fully 8051-compatible
Microcontroller with television specific hardware features. Microcontroller has been
enhanced to provide powerful features such as memory banking, data pointers and
additional interrupts etc.
The on-chip display unit for displaying Level 1.5 teletext data can also be used for
customer defined on-screen displays.
Internal XRAM consists of up to 16 KBytes. Device has an internal ROM of up to 128
KBytes. ROMless versions can access up to 1MByte of external RAM and ROM.
The SDA 55xx supports a wide range of standards including PAL, NTSC and contains a
digital slicer for VPS, WSS, PDC, and TTX, an accelerating acquisition hardware
module, a display generator for Level 1.5 TTX data and powerful On screen Display
capabilities based on parallel attributes, and Pixel oriented characters (DRCS)
The 8 bit Microcontroller runs at 360 ns. cycle time (min.). Controller with dedicated
hardware does most of the internal TTX acquisition processing, transfers data to/from
the external memory interface and receives/transmits data via I²C-firmware user-
interface.
The slicer combined with dedicated hardware stores TTX data in a VBI buffer of 1
Kilobyte. The Microcontroller firmware performs all the acquisition tasks (hamming- and
parity-checks, page search and evaluation of header control bits) once per field.
Additionally, the firmware can provide high-end Teletext-features like Packet-26-
handling, FLOF, TOP and list-pages. The interface to the user software is optimized for
minimal overhead.
SDA 55xx is realized in 0.25 micron technology with 2.5V supply voltage and 3.3V I/O
(TTL compatible).
The software and hardware development environment (TEAM) is available to simplify
and speed up the development of the software and On Screen Display. TEAM stands
for: TVT Expert Application Maker. It improves the TV controller software quality in
following aspects:
• Shorter time to market
• Re-usability
• Target independent development
• Verification and validation before targeting
• General test concept
• Graphical interface design requiring minimum programming and controller know how
• Modular and open tool chain, configurable by customer
Semiconductor Group
11
User’s Manual July 99