2

DS702F1

CS3308

TABLE OF CONTENTS

1. PIN DESCRIPTIONS ............................................................................................................................ 5

2. CHARACTERISTICS AND SPECIFICATIONS .................................................................................... 7

SPECIFIED OPERATING CONDITIONS .................................................................................................... 7

ABSOLUTE MAXIMUM RATINGS............................................................................................................... 7

ANALOG CHARACTERISTICS ................................................................................................................... 8

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

MUTE SWITCHING CHARACTERISTICS ..................................................................................................9

CONTROL PORT SWITCHING CHARACTERISTICS - I²C FORMAT ...................................................... 10

CONTROL PORT SWITCHING CHARACTERISTICS - SPI™ FORMAT ................................................. 11

3. TYPICAL CONNECTION DIAGRAM ................................................................................................. 12

4. DETAILED BLOCK DIAGRAM .......................................................................................................... 13

5. APPLICATIONS ................................................................................................................................. 14

5.1 General Description ..................................................................................................................... 14

5.2 System Design ............................................................................................................................ 14

5.2.1 Analog Inputs .................................................................................................................... 14

5.2.2 Analog Outputs .................................................................................................................. 15

5.2.3 Recommended Layout, Grounding, and Power Supply Decoupling ................................. 15

5.3 Power-Up and Power-Down ........................................................................................................ 15

5.3.1 Recommended Power-Up Sequence ................................................................................ 16

5.3.2 Recommended Power-Down Sequence ........................................................................... 16

5.4 Volume & Muting Control Architecture ........................................................................................ 17

5.4.1 Control Mapping Matrix ..................................................................................................... 17

5.4.2 Volume & Muting Control Implementation ......................................................................... 18

5.5 Volume Controls .......................................................................................................................... 19

5.5.1 Individual Channel Volume Controls ................................................................................. 19

5.5.2 Master Volume Controls .................................................................................................... 19

5.5.3 Volume Limits .................................................................................................................... 20

5.6 Muting Controls ........................................................................................................................... 21

5.6.1 Individual Channel Mute Controls ..................................................................................... 21

5.6.2 Master Mute Controls ........................................................................................................ 21

5.6.3 Hardware Mute Control ..................................................................................................... 21

5.7 Zero-Crossing Detection .............................................................................................................. 22

5.7.1 Zero-Crossing Modes ........................................................................................................ 22

5.7.2 Zero-Crossing Time-Out .................................................................................................... 22

5.8 System Serial Control Configuration ........................................................................................... 23

5.8.1 Serial Control within a Single-CS3308 System ................................................................. 23

5.8.2 Serial Control within a Multiple-CS3308 System ............................................................... 24

5.8.2.1 SPI Mode Serial Control Configuration .......................................................................................... 24

5.8.2.2 I²C Mode Control Configuration ..................................................................................................... 26

5.9 I²C/SPI Serial Control Formats .................................................................................................... 27

5.9.1 I²C Mode ............................................................................................................................ 27

5.9.2 SPI Mode ........................................................................................................................... 28

6. CS3308 REGISTER QUICK REFERENCE ........................................................................................ 29

7. CS3308 REGISTER DESCRIPTIONS ................................................................................................ 31

7.1 Ch 1-8 Volume - Addresses 01h - 08h ........................................................................................ 31

7.1.1 Volume Control (Bits 7:0) .................................................................................................. 31

7.2 ¼ dB Control - Address 09h ........................................................................................................ 32

7.2.1 ¼ dB Control (Bit 0 - 7) ...................................................................................................... 32

7.3 Mute Control - Address 0Ah ........................................................................................................ 33

7.3.1 Mute Channel X (Bit 0 - 7) ................................................................................................. 33

7.4 Device Configuration 1 - Address 0Bh (Bit 5) ..............................................................................33

7.4.1 Enable MUTE Input (Bit 5) ................................................................................................ 33