參數(shù)資料
型號(hào)： SAA7707H
廠商： NXP SEMICONDUCTORS
元件分類： 數(shù)字信號(hào)處理
英文描述： Shaft; Style: 1 - light; Applicable Model: LE-P / LEL-W
中文描述： 0-BIT, 36.86 MHz, OTHER DSP, PQFP80
封裝： 14 X 20 MM, 2.80 MM HEIGHT, PLASTIC, SOT-318-2, QFP-80
文件頁(yè)數(shù)： 15/48頁(yè)
文件大?。?/td> 244K
代理商： SAA7707H
1997 May 30
15
Philips Semiconductors
Preliminary specification
Car radio Digital Signal Processor (CDSP)
SAA7707H
8.18
Survey of the DCS clock settings in different
modes
The DCS clock behaves as shown in Table 3.
Table 3
DCS clock/mode
8.19
Synchronization with the core
A 38 kHz synchronization signal is derived from the DCS
clock and divided by 256.
If the external I
2
S-bus DCC CD is selected, the rising edge
of the Word Select input signal is used to synchronize with
the core.
MODE
DCS CLOCK
FM stereo
locked on 19 kHz pilot of received
FM signal
free running
fixed preset
FM mono
AM analog inputs
TAPE/AUX
I
2
C-bus inputs
DCC/CD
fixed preset
8.20
Interference absorption circuit
The Interference Absorption Circuit (IAC) detects and
suppresses ignition interference. This hardware IAC is a
modified and digital version of the analog circuit that has
already been in use for many years.
The input signal to the IAC circuit is derived from the output
signal of the decimation filter. The interference detector
analyses the high frequency content of this MPX signal.
The discrimination between interference pulses and other
signals is performed by a special Philips patented fuzzy
logic-like algorithm and is based on probability
calculations. This logic will send appropriate pulses to an
MPX mute switch.
At Power-on, the nominal setting for an IAC with good
performance characteristics is selected (all IAC control bits
are 0). If an adjustment is needed, the characteristics can
be adapted as described in the application manual.
8.21
IAC testing
The internal IAC trigger signal is visible on the MSS/P pin
(pin 43) if the IAC trigger output bit of the IAC control
register is set. In this mode, the effect of the parameter
settings on the IAC performance can be verified.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
SAA7708H 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Car Radio Digital Signal Processor
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
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