WM8310 datasheet(4/291 Pages) CIRRUS

4 / 291 page

WM8310

Pre-Production

PP, May 2012, Rev 3.1

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 .......................................... 14

ELECTRICAL CHARACTERISTICS ........................................................... 15

7.1 DC-DC SYNCHRONOUS BUCK CONVERTERS ............................................... 15

7.2 DC-DC STEP UP CONVERTER ......................................................................... 17

7.3 CURRENT SINKS................................................................................................ 17

7.4 LDO REGULATORS............................................................................................ 18

7.5 RESET THRESHOLDS ....................................................................................... 22

7.6 REFERENCES .................................................................................................... 22

7.7 BATTERY CHARGER ......................................................................................... 23

7.8 USB POWER CONTROL .................................................................................... 24

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

7.10

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

7.11

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

7.12

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

7.13

CLOCKING ....................................................................................................... 25

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

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

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

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

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

10.1

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

11 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

12 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

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