- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄372114 > SAA7206H (NXP SEMICONDUCTORS) DVB compliant descrambler PDF資料下載
參數(shù)資料
| 型號： | SAA7206H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費(fèi)家電 |
| 英文描述： | DVB compliant descrambler |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
| 封裝： | 14 X 20 MM, 2.80 MM HEIGHT, PLASTIC, SOT-319-2, QFP-64 |
| 文件頁數(shù)： | 8/52頁 |
| 文件大小： | 193K |
| 代理商： | SAA7206H |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁當(dāng)前第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頁第51頁第52頁
1996 Oct 09
8
Philips Semiconductors
Product specification
DVB compliant descrambler
SAA7206H
7
FUNCTIONAL DESCRIPTION
A block diagram of the internal structure of the
descrambler (DVB compliant) is illustrated in Fig.1.
The block diagram illustrates the main functional modules
in the descrambler. The modules are as follows:
The MPEG-2 syntax parser, which parses transport
streams that comply with the MPEG-2 systems
specification
The descrambler module consisting of:
– A Packet Identification (PID) bank containing 6 PID
values of the streams selected for descrambling.
All bits of PID5 (address 0x0205) can be masked
individually with PID5_mask (address 0x0209), to
enable multiple PID selection.
– A Control Word (CW) bank containing 6 CW pairs
and a default CW. A CW pair consists of
2 descrambler control words (odd and even), each
word with a length of 64 bits.
– The descrambler core containing the actual
descrambler with the stream cipher and the block
cipher module.
A microcontroller interface providing protocol handling
for the memory mapped I/O control bus
(Philips 90CE201 compatible). This module contains an
interrupt request handler and data filters for the retrieval
of Conditional Access (CA) information:
The CA filters select data on the basis of PIDs, and a
combination of MPEG-2 section addressing fields.
Selected CA data is stored in eighteen 256 byte
(constrained random access) buffers which can be read
by the microcontroller. The CA message section has a
maximum length of 256 bytes. It consists of a 3 bytes
long header with Table_id and section_length data.
The remaining part of the CA message are the
CA_data_bytes (see Fig.4). If a section is longer than
256 bytes, the data capture is stopped (with an interrupt
to the microcontroller) after 256 bytes are in the buffer
and the ‘section_to_long’ bit is set. The filters are
capable of monitoring 18 CA streams (containing EMM
and ECM data) simultaneously. Two different lengths
are used for address filtering:
– 16 filters where the first 7 bytes of the CA_data_bytes
field are used for address filtering
– 2 (DVB compliant) filters where the first 17 bytes of
the CA_data_bytes field are used for address filtering
– A chip identification byte (value 0x02) can be read by
the software from address 0x0003 (see Table 10).
Fig.3 Demultiplexer system configuration.
handbook, full pagewidth
MGG314
CONDITIONAL
ACCESS
SYSTEM
DEMODULATOR
AND
FORWARD ERROR
CORRECTOR
DVB
DESCRAMBLER
(SAA7206H)
DEMULTIPLEXER
(SAA7205)
MICRO-
CONTROLLER
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| SAA7216HS | Integrated MPEG AVGD decoders |
| SAA7221HS | Integrated MPEG AVGD decoders |
| SAA7215 | Integrated MPEG2 AVG Decoder(綜合MPEG音頻視頻圖表譯碼器) |
| SAA7221 | Integrated MPEG2 AVG Decoder(綜合MPEG音頻視頻圖表譯碼器) |
| SAA7215HS | Integrated MPEG AVGD decoders |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7207H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Reed Solomon decoder IC |
| SAA7207H/C1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Reed Solomon decoder IC |
| SAA7210 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Decoder for compact disc digital audio system |
| SAA7212 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated MPEG AVG decoder |
| SAA7212H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Integrated MPEG AVG decoder |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。