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參數(shù)資料
| 型號： | SAA5281 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Integrated Video input processor and Teletext decoder IVT1.8 |
| 中文描述： | 集成視頻輸入處理器和圖文電視解碼器IVT1.8 |
| 文件頁數(shù)： | 16/48頁 |
| 文件大?。?/td> | 1187K |
| 代理商： | SAA5281 |
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1996 Nov 04
16
Philips Semiconductors
Preliminary specification
Integrated Video input processor and
Teletext decoder (IVT1.8*)
SAA5281
ON-CHIP MEMORY
Page memory organization
The organization of the page memory is illustrated by Fig.9. The IVT1.8* provides an additional row as compared with
first generation decoders; this brings the display format up to 40 characters by 25 rows. Rows 0 to 23 form the teletext
page; row 24 is the extra row available for software generated status messages and FLOF/FASTEXT prompt
information.
Fig.9 Basic page memory organization.
handbook, full pagewidth
MBD789
7 characters
for status
8 characters
always rolling
(time)
fixed character
written by IVT hardware:
alphanumerics white for normal;
alphanumerics green when looking
for display page
7
1
8
24
24 characters from page header
rolling when display page looked for
5
to
20
0
1
2
3
4
ROW
21
22
23
24
25
MAIN PAGE DISPLAY AREA
PACKET X / 22
PACKET X / 23
PACKET X / 24 STORED HERE IF R0D7 = 1
14
10
10 bytes for
received
page information
if enabled 14 bytes reserved in
chapter 5 for VPS data
R
EMARK TO
Fig.9
Row 0
Row 0 is for the page header. The first seven characters
(0 to 6) are free for status messages. Character 8 is an
alphanumeric white or green control character, written
automatically by IVT1.8* to give a green rolling header
when a page is being looked for. The last eight characters
are for rolling time.
Row 25
The first 10 bytes of row 25 contain control data relating to
the received page as shown in Table 5. The remaining
14 bytes are free for use by the microcomputer.
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5281GP | RES 11.3K OHM 1/16W .5% 0603 SMD |
| SAA5281P | Integrated Video input processor and Teletext decoder IVT1.8 |
| SAA5281ZP | Integrated Video input processor and Teletext decoder IVT1.8 |
| SAA5284GP | Multimedia video data acquisition circuit |
| SAA5284 | Multimedia video data acquisition circuit |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5281GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated Video input processor and Teletext decoder IVT1.8 |
| SAA5281P | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated Video input processor and Teletext decoder IVT1.8 |
| SAA5281ZP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated Video input processor and Teletext decoder IVT1.8 |
| SAA5284 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multimedia video data acquisition circuit |
| SAA5284GP | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Multimedia video data acquisition circuit |
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