2003 Oct 01 2
Philips Semiconductors Product specification
CD audio decoder, digital servo and filterless
DAC with integrated pre-amp and laser control
SAA7826
CONTENTS
1 FEATURES
2 GENERAL DESCRIPTION
3 ORDERING INFORMATION
4 QUICK REFERENCE DATA
5 BLOCK DIAGRAM
6 PINNING
7 FUNCTIONAL DESCRIPTION
7.1 Data acquisition and HF data path
7.2 Decoder part
7.2.1 Principle operating modes of the decoder
7.2.2 Decoder speed and crystal frequency
7.2.3 Lock-to-disc mode
7.2.4 Standby modes
7.3 Crystal oscillator
7.4 Data slicer and bit clock regenerator
7.5 DC offset cancellation
7.5.1 Offset cancellation
7.5.2 Reading back the DC offset value
7.6 Demodulator
7.6.1 Frame sync protection
7.6.2 EFM demodulation
7.7 Subcode data processing
7.7.1 Q-channel processing
7.7.2 EIAJ 3 and 4-wire subcode (CD graphics)
interface
7.7.3 V4 subcode interface
7.7.4 CD text interface
7.8 FIFO and error correction
7.8.1 Flags output (CFLG)
7.9 Audio functions
7.9.1 De-emphasis and phase linearity
7.9.2 Digital oversampling filter
7.9.3 Concealment
7.9.4 Mute, full-scale, attenuation and fade
7.9.5 Peak detector
7.10 Audio DAC interface
7.10.1 Internal dynamic element matching
digital-to-analog converter
7.10.2 External DAC interface
7.11 EBU interface
7.11.1 Format
7.12 KILL features
7.12.1 The KILL circuit
7.12.2 Silence injection
7.13 Audio features off
7.14 The versatile pins interface
7.15 Spindle motor control
7.15.1 Motor output modes
7.15.2 Spindle motor operating modes
7.15.3 Loop characteristics
7.15.4 FIFO overflow
7.16 Servo part
7.16.1 Diode signal processing
7.16.2 Signal conditioning
7.16.3 Focus servo system
7.16.4 Radial servo system
7.16.5 Off-track counting
7.16.6 Track counting modes
7.16.7 Defect detection
7.16.8 Off-track detection
7.16.9 High-level features
7.16.10 Driver interface
7.16.11 Laser interface
7.17 Microcontroller interface
7.17.1 Microcontroller interface (4-wire bus mode)
7.17.2 Microcontroller interface (I
2
C-bus mode)
7.17.3 Decoder and shadow registers
7.17.4 Summary of functions controlled by decoder
registers 0 to F
7.17.5 Summary of functions controlled by shadow
registers
7.17.6 Summary of servo commands
7.17.7 Summary of servo command parameters
8 SUMMARY OF SERVO COMMAND
PARAMETERS VALUES
9 LIMITING VALUES
10 CHARACTERISTICS
11 OPERATING CHARACTERISTICS
(SUBCODE INTERFACE TIMING)
12 OPERATING CHARACTERISTICS (I
2
S-BUS
TIMING)
13 OPERATING CHARACTERISTICS
(MICROCONTROLLER INTERFACE TIMING)
14 APPLICATION INFORMATION
15 PACKAGE OUTLINE
16 SOLDERING
16.1 Introduction to soldering surface mount
packages
16.2 Reflow soldering
16.3 Wave soldering
16.4 Manual soldering
16.5 Suitability of surface mount IC packages for
wave and reflow soldering methods
17 DATA SHEET STATUS
18 DEFINITIONS
19 DISCLAIMERS
20 PURCHASE OF PHILIPS I
2
C COMPONENTS
