參數(shù)資料
型號: TPU3050PO
元件分類: 圖文
英文描述: TELETEXT DECODER, PDIP52
封裝: PLASTIC, DIP-52
文件頁數(shù): 67/72頁
文件大?。?/td> 347K
代理商: TPU3050PO
TPU 3035, TPU 3040, TPU 3050
PRELIMINARY DATA SHEET
7
Micronas
Fig. 2–1: Functional block diagram of the TPU 3040
TPU 3040
MUX
Clamping
AGC
ADC
Slicer
DRAM
Interface
I2C-Bus
Interface
RGB &
PRIO
Interface
65C02
Program
ROM
Program
RAM
WST
Layer
OSD
Layer
DMA
Interface
Character
ROM
Sync
Interface
Clock
Generator
42
44
43
1
22 23 24
19
20
21
2
29
27
28
25
26
40
41
34
35
31
33
36
37
38
39
7–18
3
4
5
6
30
32
Timer
Interrupt
Watchdog
Skew
Delay
2.4. Display Page Generation
A stored teletext page cannot be displayed directly, be-
cause of the row-adaptive transmission and the level 2
enhancements (row 26–29). Therefore the CPU has to
generate a display page buffer, separated into level 1
data such as character codes and spacing attributes and
into level 2 data, such as character set extension and
non-spacing attributes. This is done by using a slightly
modified stack model, in which one pointer bit for every
character location indicates the presence of additional
parallel attributes. Fig. 2–2 shows the organization of the
stack row buffer. In this stack model the number of non-
spacing attributes per row is limited to 40, which agrees
with the WST and CEPT specification.
相關(guān)PDF資料
PDF描述
TPU3050PQ TELETEXT DECODER, PQCC44
TPU3040PK TELETEXT DECODER, PDIP40
TPU3040PO TELETEXT DECODER, PDIP52
TPU3040PQ TELETEXT DECODER, PQCC44
TPU3040PK TELETEXT DECODER, PDIP40
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