2

DS646F1

CS42438

TABLE OF CONTENTS

1. PIN DESCRIPTIONS - SOFTWARE MODE ........................................................................................... 6

1.1 Digital I/O Pin Characteristics ........................................................................................................... 8

2. PIN DESCRIPTIONS - HARDWARE MODE .......................................................................................... 9

3. TYPICAL CONNECTION DIAGRAMS .................................................................................................11

4. CHARACTERISTICS AND SPECIFICATIONS..................................................................................... 13

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

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

ANALOG INPUT CHARACTERISTICS (COMMERCIAL) .................................................................... 14

ANALOG INPUT CHARACTERISTICS (AUTOMOTIVE) ..................................................................... 15

ADC DIGITAL FILTER CHARACTERISTICS ....................................................................................... 16

ANALOG OUTPUT CHARACTERISTICS (COMMERCIAL) ................................................................ 17

ANALOG OUTPUT CHARACTERISTICS (AUTOMOTIVE) ................................................................. 18

COMBINED DAC INTERPOLATION & ON-CHIP ANALOG FILTER RESPONSE .............................. 20

SWITCHING SPECIFICATIONS - ADC/DAC PORT ............................................................................ 21

SWITCHING CHARACTERISTICS - AUX PORT ................................................................................. 22

SWITCHING SPECIFICATIONS - CONTROL PORT - I²C MODE ....................................................... 23

SWITCHING SPECIFICATIONS - CONTROL PORT - SPI FORMAT ................................................. 24

DC ELECTRICAL CHARACTERISTICS .............................................................................................. 25

DIGITAL INTERFACE SPECIFICATIONS & CHARACTERISTICS ..................................................... 25

5. APPLICATIONS .................................................................................................................................... 26

5.1 Overview ......................................................................................................................................... 26

5.2 Analog Inputs .................................................................................................................................. 27

5.2.1 Line-Level Inputs ................................................................................................................... 27

5.2.1.1 Hardware Mode ......................................................................................................... 27

5.2.1.2 Software Mode ........................................................................................................... 27

5.2.2 ADC3 Analog Input ................................................................................................................ 28

5.2.3 Hardware Mode ..................................................................................................................... 29

5.2.4 Software Mode ...................................................................................................................... 29

5.2.5 High-Pass Filter and DC Offset Calibration ........................................................................... 29

5.2.5.1 Hardware Mode ......................................................................................................... 29

5.2.5.2 Software Mode ........................................................................................................... 29

5.3 Analog Outputs ............................................................................................................................... 30

5.3.1 Initialization ............................................................................................................................ 30

5.3.2 Line-Level Outputs and Filtering ............................................................................................ 30

5.3.3 Digital Volume Control ........................................................................................................... 32

5.3.3.1 Hardware Mode ......................................................................................................... 32

5.3.3.2 Software Mode ........................................................................................................... 32

5.3.4 De-Emphasis Filter ................................................................................................................ 32

5.4 System Clocking ............................................................................................................................. 33

5.4.1 Hardware Mode ..................................................................................................................... 33

5.4.2 Software Mode ...................................................................................................................... 33

5.5 CODEC Digital Interface ................................................................................................................. 33

5.5.1

TDM ................................................................................................................................ 33

5.5.2 I/O Channel Allocation ........................................................................................................... 34

5.6 AUX Port Digital Interface Formats ................................................................................................. 34

5.6.1 Hardware Mode ..................................................................................................................... 34

5.6.2 Software Mode ...................................................................................................................... 34

5.6.3 I²S .......................................................................................................................................... 34

5.6.4 Left-Justified .......................................................................................................................... 35

5.7 Control Port Description and Timing ............................................................................................... 35

5.7.1 SPI Mode ............................................................................................................................... 35

5.7.2 I²C Mode ................................................................................................................................ 36