- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372111 > SAA5503PS (NXP Semiconductors N.V.) Standard TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的標(biāo)準(zhǔn)型TV控制器) PDF資料下載
參數(shù)資料
| 型號： | SAA5503PS |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Standard TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的標(biāo)準(zhǔn)型TV控制器) |
| 中文描述： | 微控制器與標(biāo)準(zhǔn)電視屏幕顯示（OSD）（帶全屏顯示的標(biāo)準(zhǔn)型電視控制器） |
| 文件頁數(shù)： | 51/80頁 |
| 文件大?。?/td> | 311K |
| 代理商： | SAA5503PS |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁第26頁第27頁第28頁第29頁第30頁第31頁第32頁第33頁第34頁第35頁第36頁第37頁第38頁第39頁第40頁第41頁第42頁第43頁第44頁第45頁第46頁第47頁第48頁第49頁第50頁當(dāng)前第51頁第52頁第53頁第54頁第55頁第56頁第57頁第58頁第59頁第60頁第61頁第62頁第63頁第64頁第65頁第66頁第67頁第68頁第69頁第70頁第71頁第72頁第73頁第74頁第75頁第76頁第77頁第78頁第79頁第80頁
1999 Oct 27
51
Philips Semiconductors
Preliminary specification
Standard TV microcontrollers with
On-Screen Display (OSD)
SAA55xx
18.1.6.7
Packet 26 processing
One of the uses of packet 26 is to transmit characters
which are not in the basic teletext character set. The family
automatically decodes packet 26 data and, if a character
corresponding to that being transmitted is available in the
character set, automatically writes the appropriate
character code into the correct location in the teletext
memory. This is not a full implementation of the packet 26
specification allowed for in level 2 teletext, and so is often
referred to as level 1.5.
By convention, the packets 26 for a page are transmitted
before the normal packets. To prevent the default
character data overwriting the packet 26 data the device
incorporates a mechanism which prevents packet 26 data
from being overwritten. The mechanism is disabled when
the Spanish national option is detected as the Spanish
transmission system sends even parity (i.e. incorrect)
characters in the basic page locations corresponding to
the characters sent via packet 26 and these will not
overwrite the packet 26 characters anyway. The special
treatment of Spanish national option is prevented if
TXT12.ROM VER3 is logic 0 or if the TXT8.DISABLE
SPANISH is set.
Packet 26 data is processed regardless of the
TXT1.EXT PKT OFF bit, but setting theTXT1.X26 OFF
disables packet 26 processing.
The TXT8.PKT26 RECEIVED bit is set by the hardware
whenever a character is written into the page memory by
thepacket 26decodinghardware.Theflagcanberesetby
writing a logic 0 into the SFR bit.
18.1.7
WST A
CQUISITION
The family is capable of acquiring Level 1.5 625-line and
525-line World System Teletext.
18.2
Broadcast service data detection
Whenapacket 8/30isdetected,orapacket 4/30whenthe
device is receiving a 525 line transmission, the
TXT13. PKT 8/30 flag is set. The flag can be reset by
writing a 0 into the SFR bit.
18.3
VPS acquisition
When the TXT0.VPS ON bit is set, any VPS data present
on line 16, field 0 of the CVBS signal at the input of the
teletext decoder is error checked and stored in row 25,
block 9 of the basic page memory. The device
automatically detects whether teletext or VPS is being
transmitted on this line and decodes the data
appropriately.
Each VPS byte in the memory consists of 4 biphase
decoded data bits (bits 0 to 3), a biphase error flag (bit 4)
and three logic 0s (bits 5 to 7).
The TXT13.VPS RECEIVED bit is set by the hardware
whenever VPS data is acquired.
Full details of the VPS system can be found in the
“Specification of the Domestic Video Programme Delivery
Control System (PDC); EBU Tech. 3262-E”.
18.4
WSS acquisition
The Wide Screen Signalling data transmitted on line 23
gives information on the aspect ratio and display position
of the transmitted picture, the position of subtitles and on
the camera/film mode. Some additional bits are reserved
for future use. A total of 14 data bits are transmitted.
All of the available data bits transmitted by the Wide
Screen Signalling signal are captured and stored in SFRs
WSS1, WSS2 and WSS3. The bits are stored as groups of
related bits, and an error flag is provided for each group to
indicate when a transmission error has been detected in
one or more of the bits in the group.
Wide screen signalling data is only acquired when the
TXT8.WSS ON bit is set.
The TXT8.WSS RECEIVED bit is set by the hardware
whenever wide screen signalling data is acquired. The flag
can be reset by writing a logic 0 into the SFR bit.
Fig.21 VPS data storage.
handbook, full pagewidth
teletext page
header data
VPS
byte 11
row 25
10
11
column
0
9
MBK964
VPS
byte 12
VPS
byte 13
VPS
byte 14
VPS
byte 15
VPS
byte 4
VPS
byte 5
12
13
14
15
16
17
18
19
20
21
22
23
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA5551PS | Standard TV microcontrollers with On-Screen Display (OSD)(帶全屏顯示的標(biāo)準(zhǔn)型TV控制器) |
| SAA55xx | Standard TV microcontrollers with On-Screen Display (OSD)(用于屏幕顯示的標(biāo)準(zhǔn)TV微控制器) |
| 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) |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA5520 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD) |
| SAA5520PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD) |
| SAA5521PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD) |
| SAA5522PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD) |
| SAA5523PS | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Standard TV Microcontrollers with On-Screen Display(OSD) |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。