SAA7707H PDF даташит
Спецификация SAA7707H изготовлена «NXP Semiconductors» и имеет функцию, называемую «Car radio Digital Signal Processor CDSP». |
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Детали детали
Номер произв | SAA7707H |
Описание | Car radio Digital Signal Processor CDSP |
Производители | NXP Semiconductors |
логотип |
30 Pages
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INTEGRATED CIRCUITS
DATA SHEET
SAA7707H
Car radio Digital Signal Processor
(CDSP)
Preliminary specification
Supersedes data of 1996 May 22
File under Integrated Circuits, IC01
1997 May 30
No Preview Available ! |
Philips Semiconductors
Car radio Digital Signal Processor (CDSP)
Preliminary specification
SAA7707H
CONTENTS
1
1.1
1.2
2
3
4
5
6
7
8
8.1
8.2
8.3
8.4
8.5
8.6
8.7
8.8
8.9
8.10
8.11
8.12
8.13
8.14
8.15
8.16
8.17
8.18
8.19
8.20
8.21
9
9.1
9.2
9.3
9.4
9.5
9.6
9.7
9.8
FEATURES
Hardware
Software
APPLICATIONS
GENERAL DESCRIPTION
QUICK REFERENCE DATA
ORDERING INFORMATION
BLOCK DIAGRAM
PINNING
FUNCTIONAL DESCRIPTION
Signal path for level information
Level ADC switch mode integrator (pin CINT)
Internal ground reference for the level ADC
(pin VDACNL)
Common mode reference voltage for RDS
ADC, ADC level and buffers (pin VrefRDS)
Signal path for audio/MPX and stereo decoder
Mono/stereo switching
The automatic lock system
Input sensitivity for FM
Common mode reference voltage for MPX
ADC and buffers (pin VrefMPX)
Supply voltages for the switch capacitor DACs
of the FMMPX ADC and FMRDS ADC
(pins VDACNM and VDACPM)
Noise level
TAPE/AUX de-multiplex
Signal-to-noise considerations
Channel separation correction
Input selection switches
Analog inputs supply
Digitally controlled sampling clock (DCS)
Survey of the DCS clock settings in different
modes
Synchronization with the core
Interference absorption circuit
IAC testing
ANALOG OUTPUTS
Digital-to-Analog Converters
Upsample filter
Volume control
Power-on mute
Power-off plop suppression
Internal reference buffer amplifier of the DAC
(pin Vref)
Internal DAC current reference
Analog outputs supply
9.9
9.10
9.11
10
10.1
10.2
10.3
10.4
10.5
10.6
10.7
10.8
10.9
10.10
10.11
10.12
11
12
13
14
15
15.1
15.2
15.3
15.4
15.5
15.6
16
17
18
19
19.1
19.2
19.3
19.4
20
21
22
Clock circuit and oscillator
Crystal oscillator supply
External control pins
I2S-BUS DESCRIPTION
I2C-bus control (SCL and SDA pins)
I2S-bus description
Communication with external digital audio
sources (DCC + CD-WS/CL/Data pins)
Communication with external processors and
other devices (EXWS/CL/EXDAT1 and
EXDAT2)
Relationship between external input and
external output
RDS decoder (RDSCLK and RDSDAT)
Clock and data recovery
Timing of clock and data signals
Buffering of RDS data
Buffer interface
DSP reset
Power supply connection and EMC
LIMITING VALUES
THERMAL CHARACTERISTICS
DC CHARACTERISTICS
AC CHARACTERISTICS
I2C-BUS CONTROL AND COMMANDS
Characteristics of the I2C-bus
Bit transfer
START and STOP conditions
Data transfer
Acknowledge
I2C-bus format
SOFTWARE DESCRIPTION
APPLICATION INFORMATION
PACKAGE OUTLINE
SOLDERING
Introduction
Reflow soldering
Wave soldering
Repairing soldered joints
DEFINITIONS
LIFE SUPPORT APPLICATIONS
PURCHASE OF PHILIPS I2C COMPONENTS
1997 May 30
2
No Preview Available ! |
Philips Semiconductors
Car radio Digital Signal Processor (CDSP)
Preliminary specification
SAA7707H
1 FEATURES
1.1 Hardware
• Bitstream 3rd-order Sigma-Delta Analog-to-Digital
Converters (ADCs) with anti-aliasing broadband input
filters
• Digital-to-Analog Converters (DACs)with four times
oversampling and noise shaping
• Digital stereo decoder
• Improved digital Interference Absorption Circuit (IAC)
• RDS processing with optional 16-bit buffer via separate
channel (two-tuner radio possible)
• Auxiliary analog CD input (CD-walkman, speech,
economic CD-changer, etc.)
• Two separate full I2S-bus CD and DCC high
performance interfaces
• Expandable with additional Digital Signal Processors
(DSPs) for sophisticated features through an I2S-bus
gateway
• Audio output short-circuit protected
• I2C-bus controlled
• Analog tape input
• Operating ambient temperature from −40 to +85 °C.
1.2 Software
• Improved FM weak signal processing
• Integrated 19 kHz MPX filter and de-emphasis
• Electronic adjustments: FM/AM level, FM channel
separation and Dolby level
• Baseband audio processing (treble, bass, balance,
fader and volume)
• Dynamic loudness or bass boost
• Stereo one-band parametric equalizer
• Audio level meter for an automatic leveller
(in combination with microcontroller)
• Tape equalization (DCC analog playback)
• Music Search detection for Tape (MSS)
• Pause detection for RDS updates
• Dolby-B tape noise reduction
• Adjustable dynamics compressor
• CD and DCC de-emphasis processing
• Signal level, noise and multi-path detection for RDS
(I2C-bus command)
• Improved AM reception.
2 APPLICATIONS
• Car radio
• Car audio systems.
3 GENERAL DESCRIPTION
The SAA7707H performs all the signal functions in front of
the power amplifiers and behind the AM and FMMPX
demodulation of a car radio or the tape input.
These functions are:
• Interference absorption
• Stereo decoding
• RDS decoding
• FM and AM weak signal processing (soft mute, sliding
stereo, etc.)
• Dolby-B tape noise reduction
• The audio controls (volume, balance, fader, tone and
dynamics compression).
Some functions have been implemented in hardware
(stereo decoder, RDS decoder and IAC) and are not freely
programmable. Digital audio signals from external sources
with I2S-bus formats are accepted. There are four
independent analog output channels. This enables, in
special system configurations, separate tone and
equalization control for front and rear speakers.
The CDSP contains a basic program that enables a set
with:
• AM/FM reception
• Sophisticated FM weak signal functions
• Music Search detection for Tape (MSS)
• Dolby-B tape noise reduction system
• CD play with compressor function
• Separate bass and treble tone control and fader/balance
control.
For high-end sets with special and more sophisticated
features, an additional Digital Signal Processor (DSP) can
be connected. Examples of such features are:
• Noise-dependent volume control
• 10-band graphic equalizer
• Audio spectrum analyzer on display
• Signal delay for concert hall effects.
1997 May 30
3
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