CS4525 datasheet(3/98 Pages) CIRRUS

3 / 98 page

DS726PP1

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. CHARACTERISTICS AND SPECIFICATIONS .................................................................................... 18

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 .......................................................................................................... 29

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

6.1.4.1 Pre-Scaler ................................................................................................................. 30

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 Limiter .......................................................................................................39

6.1.4.12 Thermal Foldback ................................................................................................... 40

6.1.4.13 2-Way Crossover & Sensitivity Control ................................................................... 41

6.1.5 Auxiliary Serial Output .......................................................................................................... 43

6.1.6 Serial Audio Delay & Warning Input Port .............................................................................. 44

6.1.6.1 Serial Audio Delay Interface ..................................................................................... 44

6.1.6.2 External Warning Input Port ..................................................................................... 44

6.1.7 Powered PWM Outputs ........................................................................................................ 45

6.1.7.1 Output Channel Configurations ................................................................................ 45

6.1.7.2 PWM Popguard Transient Control ............................................................................ 45

6.1.8 Logic-Level PWM Outputs .................................................................................................... 46

6.1.8.1 Recommended PWM_SIG Power-Up Sequence for an External PWM Amplifier .... 47

6.1.8.2 Recommended PWM_SIG Power-Down Sequence for an External PWM Amplifier 47

6.1.8.3 Recommended PWM_SIG Power-Up Sequence for Headphone & Line-Out .......... 48

6.1.8.4 Recommended PWM_SIG Power-Down Sequence for Headphone & Line-Out ..... 48

6.1.8.5 PWM_SIG Logic-Level Output Configurations ......................................................... 49

6.1.9 PWM Modulator Configuration ..............................................................................................50

6.1.9.1 PWM Channel Delay ................................................................................................ 50

6.1.9.2 PWM AM Frequency Shift ........................................................................................ 51

6.1.10 Headphone Detection & Hardware Mute Input ................................................................... 51

6.1.11 Interrupt Reporting .............................................................................................................. 53

6.1.12 Automatic Power Stage Shut-Down ................................................................................... 53

6.2 Hardware Mode ............................................................................................................................. 54

6.2.1 System Clocking ................................................................................................................... 54

6.2.2 Power-Up and Power-Down ................................................................................................. 54

6.2.2.1 Recommended Power-Up Sequence ....................................................................... 54

CS4525 数据表(PDF) 3 Page - Cirrus Logic

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