參數(shù)資料
型號(hào): TPU3041
廠商: MICRONAS SEMICONDUCTOR HOLDING AG
元件分類: 圖文
英文描述: CONNECTOR ACCESSORY
中文描述: TELETEXT DECODER
文件頁(yè)數(shù): 3/21頁(yè)
文件大?。?/td> 378K
代理商: TPU3041
ADVANCE INFORMATION
TPU 3041
MICRONAS INTERMETALL
3
Multistandard Teletext Processor for Level 1 and 2
Release Notes:
This paper describes only those functions and characteristics of the TPU 3041 which are
different to functions and characteristics of the TPU 3040.
For detailed information on common features please read the TPU 3040 data sheet.
The information given applies to TPU 3041, technical code 22.
Revision bars indicate significant changes to the previous version.
1. Introduction
The TPU3041
is a single-chip World System Teletext
(WST) decoder for applications in analog and digital TV
sets.
It is designed for use in countries with Greek or
Cyrillic character sets. The Latin character set is still
supported including a wide range of national char-
acters.
1.1. Technical Code Change from TC19 to TC22
TPU3041 TC22 is based on hardware and firmware of
TPU3040 TC20. The following table shows the improve-
ments compared to TC18.
TPU 3040
TC10
TC12
TC13
TC14
TC16
TC17
TC18
TC20
Display
Stop rolling time/header in parallel magazin mode
Different italics timing in 10MHz analog mode
Problem: Italics characters are displayed by shifting pixel in steps
of 1/4 clock periods. In 10 MHz analog mode, pixels are
shifted by 3/4 clock periods instead.
Row 26 character flicker without parity error
Row 26 overwriting pointers in row0
Problem:
row 26 can address columns 32–39 in row 0
Solution:
set bit “row 26 hold” in display mode
Row 26 not checking row 24 hold
Double height flicker after page clear
No support of Serbian language in character set 38
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
x
PRIO Interface
Jitter in MSYNC interface
Problem:
display jitter of 1 pixel
Solution:
enable skew delay
Display flicker during channel search
x
x
x
x
x
x
x
x
Memory Manager
Ghost rows overwriting memory
Problem:
On channels with parallel magazine transmission, the
memory manager of TPU3040 can destroy ghost row
pointers. Received ghost rows are then written
randomly into memory.
Solution:
4 Mbit DRAM
x
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