WM8325 datasheet(4/254 Pages) WOLFSON

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WM8325

Production Data

PD, February 2012, Rev 4.0

TABLE OF CONTENTS

DESCRIPTION....................................................................................................... 1

FEATURES ............................................................................................................ 1

APPLICATIONS..................................................................................................... 1

BLOCK DIAGRAM ................................................................................................ 2

TYPICAL APPLICATIONS .................................................................................... 3

TABLE OF CONTENTS......................................................................................... 4

PIN CONFIGURATION.................................................................................. 8

ORDERING INFORMATION ......................................................................... 8

PIN DESCRIPTION ....................................................................................... 9

THERMAL CHARACTERISTICS ................................................................ 13

ABSOLUTE MAXIMUM RATINGS.............................................................. 14

RECOMMENDED OPERATING CONDITIONS .......................................... 15

ELECTRICAL CHARACTERISTICS ........................................................... 16

7.1 DC-DC SYNCHRONOUS BUCK CONVERTERS ............................................... 16

7.2 LDO REGULATORS............................................................................................ 19

7.3 RESET THRESHOLDS ....................................................................................... 23

7.4 REFERENCES .................................................................................................... 23

7.5 GENERAL PURPOSE INPUTS / OUTPUTS (GPIO)........................................... 24

7.6 DIGITAL INTERFACES ....................................................................................... 25

7.7 AUXILIARY ADC.................................................................................................. 25

7.8 SYSTEM STATUS LED DRIVERS ...................................................................... 25

TYPICAL POWER CONSUMPTION ........................................................... 26

TYPICAL PERFORMANCE DATA.............................................................. 27

9.1 DC-DC CONVERTERS ....................................................................................... 27

9.2 LDO REGULATORS............................................................................................ 27

SIGNAL TIMING REQUIREMENTS ............................................................ 28

10.1

CONTROL INTERFACE................................................................................... 28

DEVICE DESCRIPTION .............................................................................. 30

11.1

GENERAL DESCRIPTION ............................................................................... 30

11.2

POWER STATES ............................................................................................. 30

11.3

POWER STATE CONTROL ............................................................................. 32

11.4

POWER STATE INTERRUPTS........................................................................ 37

11.5

POWER STATE GPIO INDICATION................................................................ 37

11.6

ON PIN FUNCTION.......................................................................................... 38

11.7

RESET PIN FUNCTION ................................................................................... 39

CONTROL INTERFACE.............................................................................. 41

12.1

GENERAL DESCRIPTION ............................................................................... 41

12.2

2-WIRE (I2C) CONTROL MODE...................................................................... 41

12.3

4-WIRE (SPI) CONTROL MODE...................................................................... 44

12.4

12.5

SOFTWARE RESET AND CHIP ID.................................................................. 45

12.6

SOFTWARE SCRATCH REGISTER................................................................ 45

CLOCKING AND OSCILLATOR CONTROL .............................................. 46

13.1

GENERAL DESCRIPTION ............................................................................... 46

13.2

CRYSTAL OSCILLATOR INTERRUPTS ......................................................... 48

13.3

CRYSTAL OSCILLATOR CONNECTIONS...................................................... 49

INSTANTCONFIG™ (ICE) AND OTP MEMORY CONTROL...................... 50

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