CS42324 datasheet(3/71 Pages) CIRRUS

3 / 71 page

DS721A6

CS42324

TABLE OF CONTENTS

1. PIN DESCRIPTIONS .............................................................................................................................. 8

1.1 Software Mode ................................................................................................................................. 8

1.2 Hardware Mode .............................................................................................................................. 10

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

2. CHARACTERISTICS AND SPECIFICATIONS .................................................................................... 13

RECOMMENDED OPERATING CONDITIONS ................................................................................... 13

ABSOLUTE MAXIMUM RATINGS .......................................................................................................13

DAC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ) ........................................................... 14

DAC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) ............................................................ 15

DAC COMBINED INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 16

ADC ANALOG CHARACTERISTICS - COMMERCIAL (-CQZ) ........................................................... 17

ADC ANALOG CHARACTERISTICS - AUTOMOTIVE (-DQZ) ............................................................ 18

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

ANALOG PASS-THRU CHARACTERISTICS ...................................................................................... 20

DC ELECTRICAL CHARACTERISTICS .............................................................................................. 21

DIGITAL INTERFACE CHARACTERISTICS ....................................................................................... 21

SWITCHING CHARACTERISTICS - SERIAL AUDIO .......................................................................... 22

SWITCHING CHARACTERISTICS - SERIAL AUDIO (CONT.) ........................................................... 23

SWITCHING CHARACTERISTICS - SOFTWARE MODE - I²C FORMAT ........................................... 24

SWITCHING CHARACTERISTICS - SOFTWARE MODE - SPI FORMAT .......................................... 25

3. TYPICAL CONNECTION DIAGRAMS .................................................................................................26

4. APPLICATIONS ................................................................................................................................... 28

4.1 System Clocking ............................................................................................................................. 28

4.1.1 Master Clock ......................................................................................................................... 28

4.1.2 Synchronous / Asynchronous Mode ...................................................................................... 29

4.2 Serial Port Operation ...................................................................................................................... 29

4.2.1 Master Mode ......................................................................................................................... 30

4.2.2 Slave Mode ........................................................................................................................... 30

4.2.3 ADC, DAC1, and DAC2 clock selection ................................................................................ 31

4.2.4 High-Impedance Digital Output ............................................................................................. 31

4.2.5 Digital Interface Formats ....................................................................................................... 32

4.2.6 Synchronization of Multiple Devices ......................................................................................32

4.3 Analog-to-Digital Data Path ............................................................................................................ 33

4.3.1 ADC Analog Input Multiplexer ............................................................................................... 33

4.3.2 ADC Description .................................................................................................................... 33

4.3.3 High-Pass Filter and DC Offset Calibration ........................................................................... 34

4.3.4 Digital Attenuation Control ..................................................................................................... 34

4.4 Digital-to-Analog Data Path ............................................................................................................ 34

4.4.1 Digital Volume Control ........................................................................................................... 34

4.4.2 Mono Channel Mixer ............................................................................................................. 34

4.4.3 De-Emphasis Filter ................................................................................................................ 35

4.4.4 Internal Digital Loopback ....................................................................................................... 35

4.4.5 DAC Description .................................................................................................................... 35

4.4.6 Analog Output Multiplexer ..................................................................................................... 36

4.4.7 Output Transient Control ....................................................................................................... 36

4.4.8 Mute Control .......................................................................................................................... 37

4.5 Initialization ..................................................................................................................................... 37

4.5.1 Determining Hardware or Software Mode ............................................................................. 37

4.5.2 Hardware Mode Start-Up ...................................................................................................... 37

4.5.3 Software Mode Start-Up ........................................................................................................ 38

4.5.4 Initialization Flow Chart ......................................................................................................... 39

4.6 Device Control ................................................................................................................................ 40

CS42324 数据表(PDF) 3 Page - Cirrus Logic

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