- 您現在的位置：買賣IC網 > PDF目錄372108 > SAA2501H (NXP SEMICONDUCTORS) Digital Audio Broadcast DAB decoder PDF資料下載
參數資料
| 型號： | SAA2501H |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 消費家電 |
| 英文描述： | Digital Audio Broadcast DAB decoder |
| 中文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封裝： | 10 X 10 MM, 1.75 MM HEIGHT, PLASTIC, SOT-307-2, QFP-44 |
| 文件頁數： | 40/52頁 |
| 文件大小： | 206K |
| 代理商： | SAA2501H |
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頁當前第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
January 1995
40
Philips Semiconductors
Preliminary specification
Digital Audio Broadcast (DAB) decoder
SAA2501
Table 40
Testing L3RDY by polling L3DATA; note 1
Note
1.
No status byte transfers are needed; the load of the host (microcontroller) can thus be reduced.
L3DATA
TRANSFER
SOURCE
L3MODE
EXPLANATION
01100011
polled
host
SAA2501
0
1
write ‘read status’ operational address
test L3DATA; repeat this step until L3DATA = 1
8.2.2
O
PTIONS TO INCREASE THE TIMING ACCURACY OF
THE
APU
COEFFICIENT WRITING
The SAA2501 offers three enhancements to increase the
timing accuracy with which APU coefficients can be
updated by the application:
1.
Status polling is not required when APU coefficients
are written. L3 status flag L3RDY, when read anyhow,
will always be HIGH, indicating that the next APU
coefficient transfer may be done. The transfer speed is
only limited by the maximum allowed frequency of
L3CLK. As a result, also no ‘write item data’
operational address is needed any more before writing
each APU coefficient index.
2.
Normally, no more bytes may be written to a writeable
data item than the length of that specific item. An
exception is formed by the APU coefficients. They may
be written continuously with a coefficient wrap. After
the writing of all 4 coefficients, the writing can be
continued at the first APU coefficient without having to
write a new control byte.
3.
The data item transfer protocol, described in
Section 7.20.6, although transparent, allows only for
the reading or writing of data items from their first data
byte onwards. This approach can lead to situations
where e.g. 54 Ancillary Data item bytes must all be
read (which takes at least 54
×
200
μ
s = 10.8 ms, due
to the interface speed limitations: see Section 7.20.6)
before the next data item can be transferred. The
SAA2501 enables the writing of APU coefficients
without having to wait for the current item transfer to
finish. In order to do so, a running transfer can be
interrupted by an APU coefficient write transfer, and
then be resumed with the ‘continue current transfer’
control byte.
An item transfer may be interrupted at any time to write
APU coefficients. After the ‘continue previous transfer’
control byte, a operational address must always follow,
indicating the type of L3 transfer that will follow. An
APU coefficient write transfer itself cannot be
interrupted.
相關PDF資料 |
PDF描述 |
|---|---|
| SAA2502 | ISO/MPEG Audio Source Decoder |
| SAA2502H | ISO/MPEG Audio Source Decoder |
| SAA2503 | MPEG2 audio decoder(MPEG2 音頻譯碼器) |
| SAA2503HT | MPEG2 audio decoder |
| SAA2505H-M1 | Digital multi-channel audio IC DUET |
相關代理商/技術參數 |
參數描述 |
|---|---|
| SAA2501HB-S | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:Digital Audio Decoder & Support |
| SAA2502 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ISO/MPEG Audio Source Decoder |
| SAA2502H | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:ISO/MPEG Audio Source Decoder |
| SAA2503 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG2 audio decoder |
| SAA2503HT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:MPEG2 audio decoder |
發(fā)布緊急采購，3分鐘左右您將得到回復。