WM8311 datasheet(4/302 Pages) WOLFSON

4 / 302 page

WM8311

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.................................................................................. 9

ORDERING INFORMATION ......................................................................... 9

PIN DESCRIPTION ..................................................................................... 10

THERMAL CHARACTERISTICS ................................................................ 14

ABSOLUTE MAXIMUM RATINGS.............................................................. 15

RECOMMENDED OPERATING CONDITIONS .......................................... 16

ELECTRICAL CHARACTERISTICS ........................................................... 17

7.1 DC-DC SYNCHRONOUS BUCK CONVERTERS ............................................... 17

7.2 DC-DC STEP UP CONVERTER ......................................................................... 19

7.3 CURRENT SINKS................................................................................................ 19

7.4 LDO REGULATORS............................................................................................ 20

7.5 RESET THRESHOLDS ....................................................................................... 23

7.6 REFERENCES .................................................................................................... 23

7.7 BATTERY CHARGER ......................................................................................... 24

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

7.9 GENERAL PURPOSE INPUTS / OUTPUTS (GPIO)........................................... 26

7.10

DIGITAL INTERFACES .................................................................................... 27

7.11

AUXILIARY ADC .............................................................................................. 27

7.12

TOUCH PANEL CONTROLLER....................................................................... 28

7.13

SYSTEM STATUS LED DRIVERS................................................................... 28

7.14

CLOCKING ....................................................................................................... 28

TYPICAL POWER CONSUMPTION ........................................................... 29

TYPICAL PERFORMANCE DATA.............................................................. 30

9.1 DC-DC CONVERTERS ....................................................................................... 30

9.2 LDO REGULATORS............................................................................................ 30

10 SIGNAL TIMING REQUIREMENTS............................................................ 31

10.1

CONTROL INTERFACE................................................................................... 31

11 DEVICE DESCRIPTION .............................................................................. 33

11.1

GENERAL DESCRIPTION ............................................................................... 33

11.2

POWER STATES ............................................................................................. 33

11.3

POWER STATE CONTROL ............................................................................. 35

11.4

POWER STATE INTERRUPTS........................................................................ 40

11.5

POWER STATE GPIO INDICATION................................................................ 41

11.6

ON PIN FUNCTION.......................................................................................... 41

11.7

RESET PIN FUNCTION ................................................................................... 42

12 CONTROL INTERFACE.............................................................................. 44

12.1

GENERAL DESCRIPTION ............................................................................... 44

12.2

2-WIRE (I2C) CONTROL MODE...................................................................... 44

12.3

4-WIRE (SPI) CONTROL MODE...................................................................... 47

12.4

12.5

SOFTWARE RESET AND CHIP ID.................................................................. 48

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