DAEWOO ELECTRONICS DLP-15D3SHS, Service Manual

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Description of video circuit
5) TVT
Overview of TVT
TVT of VCTI UART PW113(IC13)
The TVT is a 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 PALplus transmissions.
The device also supports Closed Caption acquisition and decoding.
The TVT provides an integrated general-purpose, fully 8051-compatible microcontroller with
television-specific hardware features.
The on-chip display unit for displaying Level 1.5 Teletext data can also be used for customer-
defined onscreen displays.
Features
Controller Features
- 8-bit 8051 instruction set compatible CPU
- Watchdog timer
- UART
- Real time clock (RTC)
- I2C bus master/slave interface
OSD Features
- 24 kB on-chip character ROM
- Supports all East and West European languages
- National language support (Latin, Cyrillic, Greek, Arabic, Farsi, Hebrew)
- Mosaic graphic character Set
Teletext Features
- Multi-standard digital data slicer
- Full field and VBI data acquisition
- Simultaneous WST, PDC, VPS, and WSS acquisition
- Closed Caption and V-chip acquisition