SAA7824中文资料
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1 FEATURES
SAA7824
• Decoder and servo parts are based upon the SAA732X design (the original features are maintained) • Software compatibility is maintained with the SAA732X by using a similar register structure (new features are controlled from new shadow registers) • 1×, 2× and 4× speed • LF (servo) signals converted to digital representations by 6 oversampling bitstream ADCs • HF part summed from signals D1 to D4 and converted into a digital signal by a data slicer • On-chip buffering and filtering of the diode signals from the mechanism for signal optimization • Selectable DC offset cancellation of quiescent mechanism voltages and dark currents • On-chip laser power control (up to 120 mA) • Laser on/off control, including ‘soft’ start control (zero to nominal power in 1 ms) • Monitor control and feedback circuit to maintain nominal output power throughout laser life • Dynamic element matching DAC with minimum external components • DAC performance of −80 dB Total Harmonic Distortion + Noise (THD + N) and 90 dB Signal-to-Noise Ratio (S/N) A-weighted • Separate left and right channel digital silence detection available on the KILL pins • Digital silence detection on internal data and loopback (external) data • 5 versatile pins, 2 inputs and 3 outputs • Integrated CD text decoder with separate microcontroller interface • Dedicated 4 MHz or 12 MHz clock output for microcontroller (configurable) • Configured for N-sub monitor diode • On-chip clock multiplier allows the use of an 8.4672 MHz crystal or ceramic resonator • The M1 version has an EBU mute function which allows independent muting of data being transmitted over the EBU interface whilst maintaining the SPDIF frame structure. 2 GENERAL DESCRIPTION
CONTENTS 1 2 3 4 5 6 7 7.1 7.2 7.2.1 7.2.2 7.2.3 7.2.4 7.3 7.4 7.5 7.5.1 7.5.2 7.6 7.6.1 7.6.2 7.7 7.7.1 7.7.2 7.7.3 7.7.4 7.8 7.8.1 7.9 7.9.1 7.9.2 7.9.3 7.9.4 7.9.5 7.10 7.10.1 7.10.2 7.11 7.11.1 7.12 7.12.1 7.12.2 7.13 7.14 7.15 7.15.1 7.15.2 FEATURES GENERAL DESCRIPTION ORDERING INFORMATION QUICK REFERENCE DATA BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTION Data acquisition and HF data path Decoder part Principle operating modes of the decoder Decoder speed and crystal frequency Lock-to-disc mode Standby modes Crystal oscillator Data slicer and bit clock regenerator DC offset cancellation Offset cancellation Reading back the DC offset value Demodulator Frame sync protection EFM demodulation Subcode data processing Q-channel processing EIAJ 3 and 4-wire subcode (CD graphics) interface V4 subcode interface CD text interface FIFO and error correction Flags output (CFLG) Audio functions De-emphasis and phase linearity Digital oversampling filter Concealment Mute, full-scale, attenuation and fade Peak detector Audio DAC interface Internal dynamic element matching digital-to-analog converter External DAC interface EBU interface Format KILL features The KILL circuit Silence injection Audio features off The versatile pins interface Spindle motor control Motor output modes Spindle motor operating modes 2 7.15.3 7.15.4 7.16 7.16.1 7.16.2 7.16.3 7.16.4 7.16.5 7.16.6 7.16.7 7.16.8 7.16.9 7.16.10 7.16.11 7.17 7.17.1 7.17.2 7.17.3 7.17.4 7.17.5 7.17.6 7.17.7 8 9 10 11 12 13 14 15 16 16.1 16.2 16.3 16.4 16.5 17 18 19 20
Hale Waihona Puke This document covers versions M0 and M1 of the CD audio decoder IC. The SAA7824 is a CD audio decoder IC which combines the function of the SAA732X IC with the pre-amplifier and laser control functions previously found in the TZA102X IC. The design is intended to reduce the external component count and hence the Bill Of Material (BOM). Supply of this Compact Disc IC does not convey an implied license under any patent right to use this IC in any Compact Disc application.
元器件交易网
INTEGRATED CIRCUITS
DATA SHEET
SAA7824 CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)
SAA7824
Loop characteristics FIFO overflow Servo part Diode signal processing Signal conditioning Focus servo system Radial servo system Off-track counting Track counting modes Defect detection Off-track detection High-level features Driver interface Laser interface Microcontroller interface Microcontroller interface (4-wire bus mode) Microcontroller interface (I2C-bus mode) Decoder and shadow registers Summary of functions controlled by decoder registers 0 to F Summary of functions controlled by shadow registers Summary of servo commands Summary of servo command parameters SUMMARY OF SERVO COMMAND PARAMETERS VALUES LIMITING VALUES CHARACTERISTICS OPERATING CHARACTERISTICS (SUBCODE INTERFACE TIMING) OPERATING CHARACTERISTICS (I2S-BUS TIMING) OPERATING CHARACTERISTICS (MICROCONTROLLER INTERFACE TIMING) APPLICATION INFORMATION PACKAGE OUTLINE SOLDERING Introduction to soldering surface mount packages Reflow soldering Wave soldering Manual soldering Suitability of surface mount IC packages for wave and reflow soldering methods DATA SHEET STATUS DEFINITIONS DISCLAIMERS PURCHASE OF PHILIPS I2C COMPONENTS
SAA7824
• Decoder and servo parts are based upon the SAA732X design (the original features are maintained) • Software compatibility is maintained with the SAA732X by using a similar register structure (new features are controlled from new shadow registers) • 1×, 2× and 4× speed • LF (servo) signals converted to digital representations by 6 oversampling bitstream ADCs • HF part summed from signals D1 to D4 and converted into a digital signal by a data slicer • On-chip buffering and filtering of the diode signals from the mechanism for signal optimization • Selectable DC offset cancellation of quiescent mechanism voltages and dark currents • On-chip laser power control (up to 120 mA) • Laser on/off control, including ‘soft’ start control (zero to nominal power in 1 ms) • Monitor control and feedback circuit to maintain nominal output power throughout laser life • Dynamic element matching DAC with minimum external components • DAC performance of −80 dB Total Harmonic Distortion + Noise (THD + N) and 90 dB Signal-to-Noise Ratio (S/N) A-weighted • Separate left and right channel digital silence detection available on the KILL pins • Digital silence detection on internal data and loopback (external) data • 5 versatile pins, 2 inputs and 3 outputs • Integrated CD text decoder with separate microcontroller interface • Dedicated 4 MHz or 12 MHz clock output for microcontroller (configurable) • Configured for N-sub monitor diode • On-chip clock multiplier allows the use of an 8.4672 MHz crystal or ceramic resonator • The M1 version has an EBU mute function which allows independent muting of data being transmitted over the EBU interface whilst maintaining the SPDIF frame structure. 2 GENERAL DESCRIPTION
CONTENTS 1 2 3 4 5 6 7 7.1 7.2 7.2.1 7.2.2 7.2.3 7.2.4 7.3 7.4 7.5 7.5.1 7.5.2 7.6 7.6.1 7.6.2 7.7 7.7.1 7.7.2 7.7.3 7.7.4 7.8 7.8.1 7.9 7.9.1 7.9.2 7.9.3 7.9.4 7.9.5 7.10 7.10.1 7.10.2 7.11 7.11.1 7.12 7.12.1 7.12.2 7.13 7.14 7.15 7.15.1 7.15.2 FEATURES GENERAL DESCRIPTION ORDERING INFORMATION QUICK REFERENCE DATA BLOCK DIAGRAM PINNING FUNCTIONAL DESCRIPTION Data acquisition and HF data path Decoder part Principle operating modes of the decoder Decoder speed and crystal frequency Lock-to-disc mode Standby modes Crystal oscillator Data slicer and bit clock regenerator DC offset cancellation Offset cancellation Reading back the DC offset value Demodulator Frame sync protection EFM demodulation Subcode data processing Q-channel processing EIAJ 3 and 4-wire subcode (CD graphics) interface V4 subcode interface CD text interface FIFO and error correction Flags output (CFLG) Audio functions De-emphasis and phase linearity Digital oversampling filter Concealment Mute, full-scale, attenuation and fade Peak detector Audio DAC interface Internal dynamic element matching digital-to-analog converter External DAC interface EBU interface Format KILL features The KILL circuit Silence injection Audio features off The versatile pins interface Spindle motor control Motor output modes Spindle motor operating modes 2 7.15.3 7.15.4 7.16 7.16.1 7.16.2 7.16.3 7.16.4 7.16.5 7.16.6 7.16.7 7.16.8 7.16.9 7.16.10 7.16.11 7.17 7.17.1 7.17.2 7.17.3 7.17.4 7.17.5 7.17.6 7.17.7 8 9 10 11 12 13 14 15 16 16.1 16.2 16.3 16.4 16.5 17 18 19 20
Hale Waihona Puke This document covers versions M0 and M1 of the CD audio decoder IC. The SAA7824 is a CD audio decoder IC which combines the function of the SAA732X IC with the pre-amplifier and laser control functions previously found in the TZA102X IC. The design is intended to reduce the external component count and hence the Bill Of Material (BOM). Supply of this Compact Disc IC does not convey an implied license under any patent right to use this IC in any Compact Disc application.
元器件交易网
INTEGRATED CIRCUITS
DATA SHEET
SAA7824 CD audio decoder, digital servo and filterless DAC with integrated pre-amp and laser control (PhonIC)
SAA7824
Loop characteristics FIFO overflow Servo part Diode signal processing Signal conditioning Focus servo system Radial servo system Off-track counting Track counting modes Defect detection Off-track detection High-level features Driver interface Laser interface Microcontroller interface Microcontroller interface (4-wire bus mode) Microcontroller interface (I2C-bus mode) Decoder and shadow registers Summary of functions controlled by decoder registers 0 to F Summary of functions controlled by shadow registers Summary of servo commands Summary of servo command parameters SUMMARY OF SERVO COMMAND PARAMETERS VALUES LIMITING VALUES CHARACTERISTICS OPERATING CHARACTERISTICS (SUBCODE INTERFACE TIMING) OPERATING CHARACTERISTICS (I2S-BUS TIMING) OPERATING CHARACTERISTICS (MICROCONTROLLER INTERFACE TIMING) APPLICATION INFORMATION PACKAGE OUTLINE SOLDERING Introduction to soldering surface mount packages Reflow soldering Wave soldering Manual soldering Suitability of surface mount IC packages for wave and reflow soldering methods DATA SHEET STATUS DEFINITIONS DISCLAIMERS PURCHASE OF PHILIPS I2C COMPONENTS
