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參數(shù)資料
| 型號(hào)： | SAA55xx |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Standard TV microcontrollers with On-Screen Display (OSD)(用于屏幕顯示的標(biāo)準(zhǔn)TV微控制器) |
| 中文描述： | 微控制器與標(biāo)準(zhǔn)電視屏幕顯示（OSD）（用于屏幕顯示的標(biāo)準(zhǔn)電視微控制器） |
| 文件頁數(shù)： | 47/80頁 |
| 文件大小： | 311K |
| 代理商： | SAA55XX |
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1999 Oct 27
47
Philips Semiconductors
Preliminary specification
Standard TV microcontrollers with
On-Screen Display (OSD)
SAA55xx
18.1.6.4
Teletext memory organisation
The teletext memory is divided into 2 banks of 10 blocks.
Normally, when the TXT1.EXT PKT OFF bit is logic 0,
each of blocks 0 to 8 contains a teletext page arranged in
the same way as the basic page memory of the page
device and block 9 contains extension packets. When the
TXT1.EXT PKT OFF bit is logic 1, no extension packets
are captured and block 9 of the memory is used to store
another page. The number of the memory block into which
a page is written corresponds to the page request number
which resulted in the capture of the page.
Packet 0, the page header, is split into two parts when it is
writtenintothetextmemory.Thefirst8 bytesoftheheader
contain control and addressing information. They are
Hamming decoded and written into columns 0 to 7 of
row 25. Row 25 also contains the magazine number of the
acquired page and the PLBF flag but the last 14 bytes are
unused and may be used by the software, if necessary.
Fig.18 Extension packet storage locations.
(1) If ‘X24 POSN’ bit = 0.
(2) Byte 10 reserved.
handbook, full pagewidth
GSA002
0
1
2
3
4
5
6
7
8
9
9
23
0
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
Row
Packet X/24 for page in block 0
(1)
Packet X/27/0 for page in block 0
Packet 8/30/0.1
Packet 8/30/2.3
Packet X/24 for page in block 1
(1)
Packet X/27/0 for page in block 1
Packet X/24 for page in block 2
(1)
Packet X/27/0 for page in block 2
Packet X/24 for page in block 3
(1)
Packet X/27/0 for page in block 3
Packet X/24 for page in block 4
(1)
Packet X/27/0 for page in block 4
Packet X/24 for page in block 5
(1)
Packet X/27/0 for page in block 5
Packet X/24 for page in block 6
(1)
Packet X/27/0 for page in block 6
Packet X/24 for page in block 7
(1)
Packet X/27/0 for page in block 7
Packet X/24 for page in block 8
(1)
Packet X/27/0 for page in block 8
Packet 8/30/4-15
VPS Data
Extension Packet Block (9)
10
(2)
相關(guān)PDF資料 |
PDF描述 |
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| SAA5500PS | Standard TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的標(biāo)準(zhǔn)型TV控制器) |
| SAA5501PS | Standard TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的標(biāo)準(zhǔn)型TV控制器) |
| SAA5502PS | Standard TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的標(biāo)準(zhǔn)型TV控制器) |
| SAA5520 | Standard TV Microcontrollers with On-Screen Display(OSD) |
| SAA5520PS | Standard TV Microcontrollers with On-Screen Display(OSD) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
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| SAA5603 | 制造商:未知廠家 制造商全稱:未知廠家 功能描述: |
| SAA5645 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD |
| SAA5645HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD |
| SAA5647 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD |
| SAA5647HL | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Enhanced TV microcontrollers with On-Screen Display OSD |
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