CRD4525 Просмотр технического описания (PDF) - Cirrus Logic
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CRD4525 Datasheet PDF : 91 Pages
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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
DS726A1
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