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SAA7707H Dataheets PDF



Part Number SAA7707H
Manufacturers NXP
Logo NXP
Description Car radio Digital Signal Processor
Datasheet SAA7707H DatasheetSAA7707H Datasheet (PDF)

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 Philips Semiconductors Preliminary specification Car radio Digital Signal Processor (CDSP) 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 FEATURES Hardware Software APPLICATIONS GENERAL DESCRIPTION QUICK REFERENCE DATA ORDERING INFORMATION BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTI.

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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 Philips Semiconductors Preliminary specification Car radio Digital Signal Processor (CDSP) 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 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 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 9.9 9.10 9.11 10 10.1 10.2 10.3 10.4 Clock circuit and oscillator Crystal oscillator supply External control pins I2S-BUS DESCRIPTION SAA7707H 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 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 1997 May 30 2 Philips Semiconductors Preliminary specification Car radio Digital Signal Processor (CDSP) 1 1.1 FEATURES Hardware 2 APPLICATIONS SAA7707H • Car radio • Car audio systems. 3 GENERAL DESCRIPTION • 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 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 featur.


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