CS42438 Просмотр технического описания (PDF) - Cirrus Logic

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CS42438

108 dB, 192 kHz 6-in, 8-out TDM CODEC

Cirrus Logic 

TABLE OF CONTENTS

1 PIN DESCRIPTION - SOFTWARE MODE ................................................................................ 6

1.1 Digital I/O Pin Characteristics ............................................................................................ 7

2 PIN DESCRIPTIONS - HARDWARE MODE ............................................................................ 8

3 TYPICAL CONNECTION DIAGRAMS .................................................................................... 10

4 CHARACTERISTICS AND SPECIFICATIONS ....................................................................... 12

SPECIFIED OPERATING CONDITIONS ............................................................................... 12

ABSOLUTE MAXIMUM RATINGS ......................................................................................... 12

ANALOG INPUT CHARACTERISTICS (CS42438-CMZ)....................................................... 13

ANALOG INPUT CHARACTERISTICS (CS42438-DMZ)....................................................... 14

ADC DIGITAL FILTER CHARACTERISTICS ......................................................................... 15

ANALOG OUTPUT CHARACTERISTICS (CS42438-CMZ)................................................... 16

ANALOG OUTPUT CHARACTERISTICS (CS42438-DMZ)................................................... 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

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

5.2.3 High Pass Filter and DC Offset Calibration ......................................................... 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

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

5.4 System Clocking .............................................................................................................. 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 .................................................................................. 35

5.6.1 I²S ........................................................................................................................ 35

5.6.2 Left Justified ........................................................................................................ 35

5.7 Control Port Description and Timing ................................................................................ 36

5.7.1 SPI Mode ............................................................................................................ 36

5.7.2 I2C Mode ............................................................................................................. 37

5.8 Recommended Power-up Sequence ............................................................................... 38

5.8.1 Hardware Mode ................................................................................................... 38

5.8.2 Software Mode .................................................................................................... 38

5.9 Reset and Power-up ....................................................................................................... 38

5.10 Power Supply, Grounding, and PCB layout ................................................................... 39

6 REGISTER QUICK REFERENCE ........................................................................................... 40

7 REGISTER DESCRIPTION ..................................................................................................... 42

7.1 Memory Address Pointer (MAP) ....................................................................................... 42

7.2 Chip I.D. and Revision Register (address 01h) (Read Only) ............................................ 42

7.3 Power Control (address 02h) ............................................................................................ 43

7.4 Functional Mode (address 03h) ........................................................................................ 44

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DS646PP2

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