WM8311
TABLE OF CONTENTS
Pre-Production
DESCRIPTION ....................................................................................................... 1
FEATURES ............................................................................................................ 1
APPLICATIONS..................................................................................................... 1
BLOCK DIAGRAM ................................................................................................ 2
TYPICAL APPLICATIONS .................................................................................... 3
TABLE OF CONTENTS ......................................................................................... 4
1
PIN CONFIGURATION.................................................................................. 9
2
ORDERING INFORMATION ......................................................................... 9
3
PIN DESCRIPTION ..................................................................................... 10
4
THERMAL CHARACTERISTICS ................................................................ 14
5
ABSOLUTE MAXIMUM RATINGS.............................................................. 15
6
RECOMMENDED OPERATING CONDITIONS .......................................... 16
7
ELECTRICAL CHARACTERISTICS ........................................................... 17
DC-DC SYNCHRONOUS BUCK CONVERTERS ............................................... 17
DC-DC STEP UP CONVERTER ......................................................................... 19
CURRENT SINKS................................................................................................ 19
LDO REGULATORS ............................................................................................ 20
RESET THRESHOLDS ....................................................................................... 23
REFERENCES .................................................................................................... 23
BATTERY CHARGER ......................................................................................... 24
USB POWER CONTROL .................................................................................... 24
GENERAL PURPOSE INPUTS / OUTPUTS (GPIO)........................................... 26
DIGITAL INTERFACES .................................................................................... 27
AUXILIARY ADC .............................................................................................. 27
TOUCH PANEL CONTROLLER ....................................................................... 28
SYSTEM STATUS LED DRIVERS ................................................................... 28
CLOCKING ....................................................................................................... 28
8
TYPICAL POWER CONSUMPTION ........................................................... 29
9
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 REGISTER LOCKING ...................................................................................... 47
12.5 SOFTWARE RESET AND CHIP ID .................................................................. 48
7.1
7.2
7.3
7.4
7.5
7.6
7.7
7.8
7.9
7.10
7.11
7.12
7.13
7.14
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PP, May 2012, Rev 3.1
4
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
