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參數(shù)資料
| 型號： | TPU2735 |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | Teletext Processor |
| 中文描述： | 圖文處理器 |
| 文件頁數(shù)： | 4/37頁 |
| 文件大?。?/td> | 1019K |
| 代理商： | TPU2735 |
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TPU 2735
4
Teletext Processor for Level 1 Teletext
Note:
If not otherwise designated the pin numbers men-
tioned refer to the 40-pin DIL package.
1. Introduction
The TPU 2735 is specified to handle Level-1-Teletext in-
formation (in Germany: Videotext) as it is transmitted to-
day by the TV broadcast stations in Great Britain, Ger-
many and other European countries. The TPU 2735 is
part of the DIGIT 2000 digital TV system and works in
conjunction with the other VLSI circuits and processors
of this system. This makes the Teletext adapter de-
signed with the TPU 2735 very simple and economic
(see Fig. 1–1).
The TPU 2735 is an N-channel VLSI MOS circuit,
housed in a 40-pin Dil plastic package and contains on
a single silicon chip the following functions:
– one-chip solution of the Teletext processing (except
for external RAM)
– ghost compensation to eliminate the effects of ghost
pictures due to reflections
– reduced access time is provided for the Teletext pages
by receiving and storing up to eight pages in one go
– up to 32 stored pages
– automatic language-dependent character selection
– switchover facility PAL/NTSC/D2MAC
– full level one features (FLOF) support
– level 1.5 Spanish Teletext support
– largely compatible to the TPU 2732/33
MCU 2600
MAIN
Clock Gen.
TPU 2735
Teletext
Processor
VCU 2133 or
VCU 2134
IF
Amplifier
Tuner
64 kBit
256 kBit
D RAM
SAA 1250
IR Trans–
mitter
to CRT
Teletext Adapter
6
4
3
Fig. 1–1:
Teletext application block diagram
CCU 20XX or
CCU 3000
Central
Control Unit
TBA 2800
IR
Preamplifier
Keyboard
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