WM8310
Pre-Production
15.14 POWER GOOD INDICATION .......................................................................... 91
15.15 DC-DC CONVERTER OPERATION ................................................................ 92
15.15.1 OVERVIEW..........................................................................................................................92
15.15.2 DC-DC SYNCHRONOUS BUCK CONVERTERS................................................................93
15.15.3 DC-DC STEP UP CONVERTER..........................................................................................96
15.16 LDO REGULATOR OPERATION..................................................................... 97
15.16.1 OVERVIEW..........................................................................................................................97
15.16.2 LDO REGULATORS ............................................................................................................97
16 CURRENT SINKS ....................................................................................... 99
16.1
16.2
GENERAL DESCRIPTION............................................................................... 99
CURRENT SINK CONTROL ............................................................................ 99
16.2.1
16.2.2
16.2.3
ENABLING THE SINK CURRENT .......................................................................................99
PROGRAMMING THE SINK CURRENT ...........................................................................100
ON/OFF RAMP TIMING.....................................................................................................101
16.3
16.4
CURRENT SINK INTERRUPTS..................................................................... 102
LED DRIVER CONNECTIONS....................................................................... 103
17 POWER SUPPLY CONTROL ................................................................... 104
17.1
17.2
17.3
17.4
17.5
17.6
17.7
GENERAL DESCRIPTION............................................................................. 104
BATTERY POWERED OPERATION ............................................................. 106
WALL ADAPTOR POWERED OPERATION.................................................. 106
USB POWERED OPERATION....................................................................... 107
POWER PATH MANAGEMENT INTERRUPTS............................................. 108
BACKUP POWER .......................................................................................... 109
BATTERY CHARGER .................................................................................... 109
17.7.1
17.7.2
GENERAL DESCRIPTION.................................................................................................109
BATTERY CHARGER ENABLE.........................................................................................111
FAST CHARGING..............................................................................................................112
CHARGER TIMEOUT AND TERMINATION......................................................................113
BATTERY CHARGE CURRENT MONITORING................................................................115
BATTERY FAULT / OVERVOLTAGE CONDITIONS.........................................................116
BATTERY TEMPERATURE MONITORING ......................................................................116
BATTERY CHARGER INTERRUPTS................................................................................118
BATTERY CHARGER STATUS.........................................................................................119
17.7.3
17.7.4
17.7.5
17.7.6
17.7.7
17.7.8
17.7.9
18 AUXILIARY ADC....................................................................................... 120
18.1
18.2
18.3
18.4
18.5
GENERAL DESCRIPTION............................................................................. 120
AUXADC CONTROL ...................................................................................... 120
AUXADC READBACK.................................................................................... 122
DIGITAL COMPARATORS............................................................................. 123
AUXADC INTERRUPTS................................................................................. 125
19 RESERVED............................................................................................... 125
20 REAL-TIME CLOCK (RTC)....................................................................... 126
20.1
20.2
20.3
20.4
20.5
GENERAL DESCRIPTION............................................................................. 126
RTC CONTROL.............................................................................................. 126
RTC INTERRUPTS ........................................................................................ 128
DIGITAL RIGHTS MANAGEMENT ................................................................ 129
BACKUP MODE CLOCKING OPTIONS ........................................................ 129
21 GENERAL PURPOSE INPUTS / OUTPUTS (GPIO) ................................ 130
21.1
21.2
21.3
21.4
GENERAL DESCRIPTION............................................................................. 130
GPIO FUNCTIONS......................................................................................... 130
CONFIGURING GPIO PINS........................................................................... 132
GPIO INTERRUPTS....................................................................................... 136
22 SYSTEM STATUS LED DRIVERS............................................................ 137
PP, May 2012, Rev 3.1
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
