CS4525 datasheet(3/91 Pages) CIRRUS

3 / 91 page

DS726A1

CS4525

TABLE OF CONTENTS

1. PIN DESCRIPTIONS - SOFTWARE MODE .......................................................................................... 8

2. PIN DESCRIPTIONS - HARDWARE MODE ....................................................................................... 10

2.1 Digital I/O Pin Characteristics ........................................................................................................ 12

3. TYPICAL CONNECTION DIAGRAMS .................................................................................................13

4. TYPICAL SYSTEM CONFIGURATION DIAGRAMS ........................................................................... 15

5. CHARACTERISTIC AND SPECIFICATION TABLES ......................................................................... 18

SPECIFIED OPERATING CONDITIONS ............................................................................................. 18

ABSOLUTE MAXIMUM RATINGS .......................................................................................................18

ANALOG INPUT CHARACTERISTICS ................................................................................................ 19

ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 19

PWM POWER OUTPUT CHARACTERISTICS .................................................................................... 20

SERIAL AUDIO INPUT PORT SWITCHING SPECIFICATIONS ......................................................... 21

AUX SERIAL AUDIO I/O PORT SWITCHING SPECIFICATIONS ....................................................... 22

XTI SWITCHING SPECIFICATIONS .................................................................................................... 23

SYS_CLK SWITCHING SPECIFICATIONS ......................................................................................... 23

PWM_SIGX SWITCHING SPECIFICATIONS ...................................................................................... 23

I²C CONTROL PORT SWITCHING SPECIFICATIONS ....................................................................... 24

DC ELECTRICAL CHARACTERISTICS .............................................................................................. 25

DIGITAL INTERFACE SPECIFICATIONS ........................................................................................... 25

6. APPLICATIONS ................................................................................................................................... 26

6.1 Software Mode ............................................................................................................................... 26

6.1.1 System Clocking ................................................................................................................... 26

6.1.1.1 SYS_CLK Input Clock Mode .................................................................................... 26

6.1.1.2 Crystal Oscillator Mode ............................................................................................ 27

6.1.2 Power-Up and Power-Down ................................................................................................. 28

6.1.2.1 Recommended Power-Up Sequence ....................................................................... 28

6.1.2.2 Recommended Power-Down Sequence .................................................................. 28

6.1.3 Input Source Selection .......................................................................................................... 28

6.1.4 Digital Sound Processing ...................................................................................................... 29

6.1.4.1 Pre-Scaler ................................................................................................................. 29

6.1.4.2 Digital Signal Processing High-Pass Filter ............................................................... 30

6.1.4.3 Channel Mixer ..........................................................................................................30

6.1.4.4 De-Emphasis ............................................................................................................31

6.1.4.5 Tone Control ............................................................................................................. 31

6.1.4.6 Parametric EQ ..........................................................................................................33

6.1.4.7 Adaptive Loudness Compensation ........................................................................... 34

6.1.4.8 Bass Management .................................................................................................... 35

6.1.4.9 Volume and Muting Control ...................................................................................... 36

6.1.4.10 Peak Signal Limiter ................................................................................................. 37

6.1.4.11 Thermal Foldback ................................................................................................... 39

6.1.4.12 2-Way Crossover & Sensitivity Control ................................................................... 41

6.1.5 Auxiliary Serial Output .......................................................................................................... 42

6.1.6 Serial Audio Delay & Warning Input Port .............................................................................. 42

6.1.6.1 Serial Audio Delay Interface ..................................................................................... 42

6.1.6.2 External Warning Input Port ..................................................................................... 43

6.1.7 PWM Output Configuration ................................................................................................... 43

6.1.7.1 PWM Power Output Configurations .......................................................................... 43

6.1.7.2 PWM_SIG Logic-Level Output Configurations ......................................................... 44

6.1.7.3 PWM PopGuard Transient Control ........................................................................... 45

6.1.7.4 PWM Channel Delay ................................................................................................ 46

6.1.7.5 PWM AM Frequency Shift ........................................................................................ 47

6.1.8 Headphone Detection & Hardware Mute Input ..................................................................... 47

CS4525 数据表(PDF) 3 Page - Cirrus Logic

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