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CS44600

6-Channel Digital Amplifier Controller

Cirrus Logic 

CS44600

TABLE OF CONTENTS

1. CHARACTERISTICS AND SPECIFICATIONS ...................................................................................... 8

SPECIFIED OPERATING CONDITIONS .............................................................................................. 8

ABSOLUTE MAXIMUM RATINGS ........................................................................................................ 8

DC ELECTRICAL CHARACTERISTICS ............................................................................................... 9

DIGITAL INTERFACE CHARACTERISTICS ........................................................................................ 9

PWM OUTPUT PERFORMANCE CHARACTERISTICS .................................................................... 10

PWM FILTER CHARACTERISTICS ................................................................................................... 11

SWITCHING CHARACTERISTICS - XTI ............................................................................................ 11

SWITCHING CHARACTERISTICS - SYS_CLK .................................................................................. 12

SWITCHING CHARACTERISTICS - PWMOUTA1-B3 ....................................................................... 12

SWITCHING CHARACTERISTICS - PS_SYNC ................................................................................. 12

SWITCHING CHARACTERISTICS - DAI INTERFACE ...................................................................... 13

SWITCHING CHARACTERISTICS - CONTROL PORT - I²C FORMAT ............................................. 14

SWITCHING CHARACTERISTICS - CONTROL PORT - SPI FORMAT ............................................ 15

2. PIN DESCRIPTIONS ......................................................................................................................... 16

2.1 I/O Pin Characteristics ................................................................................................................ 19

3. TYPICAL CONNECTION DIAGRAMS

...................................................................................... 20

4. APPLICATIONS ................................................................................................................................... 22

4.1 Overview ....................................................................................................................................... 22

4.2 Feature Set Summary ................................................................................................................... 22

4.3 Clock Generation ........................................................................................................................... 23

4.3.1 FsIn Domain Clocking .......................................................................................................... 24

4.3.2 FsOut Domain Clocking ........................................................................................................ 24

4.4 FsIn Clock Domain Modules ......................................................................................................... 26

4.4.1 Digital Audio Input Port ......................................................................................................... 26

4.4.2 Auto Rate Detect .................................................................................................................. 30

4.4.3 De-Emphasis ........................................................................................................................ 30

4.5 FsOut Clock Domain Modules ....................................................................................................... 31

4.5.1 Sample Rate Converter ........................................................................................................ 31

4.5.2 Load Compensation Filter .................................................................................................... 31

4.5.3 Digital Volume and Mute Control .......................................................................................... 31

4.5.4 Peak Detect / Limiter ............................................................................................................ 32

4.5.5 PWM Engines ....................................................................................................................... 32

4.5.6 Interpolation Filter ................................................................................................................. 33

4.5.7 Quantizer .............................................................................................................................. 33

4.5.8 Modulator ............................................................................................................................. 33

4.5.9 PWM Outputs ....................................................................................................................... 33

4.5.10 Power Supply Rejection (PSR) Real-Time Feedback ........................................................ 34

4.6 Control Port Description and Timing ............................................................................................. 35

4.6.1 SPI Mode .............................................................................................................................. 35

4.6.2 I²C Mode ............................................................................................................................... 36

4.6.3 GPIOs ................................................................................................................................... 37

4.6.4 Host Interrupt ........................................................................................................................ 37

5. POWER SUPPLY, GROUNDING, AND PCB LAYOUT ....................................................................... 38

5.1 Reset and Power-Up ..................................................................................................................... 41

5.1.1 PWM PopGuard® Transient Control .................................................................................... 41

5.1.2 Recommended Power-Up Sequence ................................................................................... 41

5.1.3 Recommended PSR Calibration Sequence ........................................................................ 42

5.1.4 Recommended Power-Down Sequence .............................................................................. 43

6. REGISTER QUICK REFERENCE ........................................................................................................ 44

7. REGISTER DESCRIPTION .................................................................................................................. 48

7.1 Memory Address Pointer (MAP) .................................................................................................... 48

DS633F1

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