CS42324 Datasheet, PDF (3/71 Pages) Cirrus Logic – 10-In, 6-Out, 2 Vrms Audio CODEC

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
DS721A6
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