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參數(shù)資料
| 型號： | SAA7708H |
| 廠商： | NXP Semiconductors N.V. |
| 元件分類： | 數(shù)字信號處理 |
| 英文描述： | Car Radio Digital Signal Processor |
| 中文描述： | 汽車無線電數(shù)字信號處理器 |
| 文件頁數(shù)： | 26/60頁 |
| 文件大?。?/td> | 281K |
| 代理商： | SAA7708H |
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1998 May 19
26
Philips Semiconductors
Preliminary specification
Car Radio Digital Signal Processor
SAA7708H
10.14 I
2
S and SPDIF inputs
10.14.1 G
ENERAL DESCRIPTION
I
2
S
INPUTS
For communication with external digital sources a I
2
S digital interface bus can be used. It is a serial 3-line bus, having
one line for data, one line for clock and one line for the word select. For external digital sources the SAA7708 acts as a
slave, so the external source is master and supplies the clock.
The digital audio input is capable of handling multiple input formats. For brevity the serial digital audio in- and outputs are
called I
2
S. However this does not mean that the format is always the Philips I
2
S standard.
The I
2
S input is capable of handling Philips I
2
S, and LSB justified formats of 16, 18 and 20 bits word sizes, fs can vary
from 32 kHz until 48 kHz.
See the I
2
C Memory Map for the bits that must be programmed, for selection of the desired I
2
S format.
See Fig. 10 for the general waveform formats of the four possible formats.
The number of bitclock (BCK) pulses may vary in the application. When the applied wordlength is smaller than 18 bits
(internal resolution), the LSB bits will get internally a zero value.
When the applied wordlength exceeds 18 bits, the LSB’s are skipped.
The input circuitry is limited in handling the number of BCK pulses per WS period. The maximum allowed number of
bitclocks per WS period is 512.
10.14.2 T
HE TIMING DIAGRAM OF THE COMMUNICATION IS SHOWN IN
F
IG
. 11.
The DSP program is synchronised with the external source via the word select signal. On every negative edge of the
IIS_WS the I flag of the status register is set.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| SAA7709/N107 | 制造商:PHILIPS-SEMI 功能描述: |
| SAA7709H/N103 | 功能描述:音頻 DSP DIGITAL SIGNAL PROCESSOR RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAA7709H/N103,518 | 功能描述:音頻 DSP DIRAC-2 RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAA7709H/N103,557 | 功能描述:音頻 DSP DIGITAL SIGNAL RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
| SAA7709H/N103/S420 | 功能描述:音頻 DSP Car radio Digital Signal Processor RoHS:否 制造商:Texas Instruments 工作電源電壓: 電源電流: 工作溫度范圍: 安裝風(fēng)格: 封裝 / 箱體: 封裝:Tube |
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