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TFT TV Service Manual 11/04/2006
11.20. PI5V330
11.20.1. General
Description
The PI5V330 is well suited for video applications when switching composite or RGB analogue. A
picture-in-picture application will be described in this brief. The pixel-rate creates video overlays so two
or more pictures can be viewed at the same time. An inexpensive NTSC titler can be implemented by
superimposing the output of a character generator on a standard composite video background.
11.21. SDA55XX (SDA5550)
11.21.1. General
description
The SDA55XX 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 also supports Closed caption
acquisition and decoding. 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 to16 Kbytes. Device has an internal ROM of up to 128 KBytes.
ROMless versions can access up to 1 MByte 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, TTX
and Closed Caption, 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 external memory interface and
receives/ transmits data via I
2
C-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 user software is optimized for minimal overhead. SDA 55XX is realized
in 0.25 micron technology with 2.5 V supply voltage and 3.3 V 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.
11.22. Sil 9993
11.22.1. General
Description
The SiI 9993 is the first generation of PanelLink receivers that are designed for the HDMI 1.0 (High
Definition Multimedia Interface) specification. DTVs, plasma displays, LCD TVs and projectors can now
provide the purest level of protected digital audio/video over a simple, low cost cable. Backwards
compatibility with DVI 1.0 allows HDMI systems to connect to any DVI 1.0 host (DVD players, HD set
top boxes, D-VHS players and receivers, PC). The SiI 9993 incorporates a flexible audio and video
interface. The receiver can connect to RGB input and output YCbCr using an integrated color space
converter. This allows full backward compatibility to DVI, and interfaces to all major video processors.
A S/PDIF port can output PCM encoded data as well as Dolby Digital, DTS and all other formats
capable of being sent over S/PDIF. A 2-channel I2S port outputs data converted from S/PDIF. The SiI
9993 comes pre-programmed with HDCP keys, greatly simplifying the manufacturing process, lowering
costs, all the while providing the highest level of HDCP key security. Silicon Image’s PanelLink
