Production Data
WM8350
LED DRIVER CONNECTIONS..................................................................... 153
17 POWER SUPPLY CONTROL....................................................................154
16.4
17.1
17.2
17.3
17.4
17.5
17.6
17.7
GENERAL DESCRIPTION ........................................................................... 154
BATTERY POWERED OPERATION............................................................ 155
WALL ADAPTOR (LINE) POWERED OPERATION..................................... 155
USB POWERED OPERATION..................................................................... 156
EXTERNAL INTERRUPTS........................................................................... 158
BACKUP POWER ........................................................................................ 158
BATTERY CHARGER .................................................................................. 159
17.7.1
17.7.2
GENERAL DESCRIPTION.................................................................................................159
BATTERY CHARGER ENABLE.........................................................................................160
TRICKLE CHARGING........................................................................................................161
FAST CHARGING..............................................................................................................163
BATTERY CHARGER TIMEOUT AND TERMINATION.....................................................165
BATTERY CHARGER STATUS.........................................................................................166
BATTERY FAULT CONDITIONS.......................................................................................167
INTERRUPTS AND FAULT PROTECTION .......................................................................169
17.7.3
17.7.4
17.7.5
17.7.6
17.7.7
17.7.8
18 SYSTEM MONITORING AND UNDERVOLTAGE LOCKOUT (UVLO).....170
19 AUXILIARY ADC........................................................................................172
19.1
19.2
19.3
19.4
19.5
19.6
19.7
GENERAL DESCRIPTION ........................................................................... 172
INITIATING AUXADC MEASUREMENTS .................................................... 173
VOLTAGE SCALING AND REFERENCES................................................... 175
AUXADC READBACK .................................................................................. 176
CALIBRATION.............................................................................................. 178
DIGITAL COMPARATORS........................................................................... 179
AUXADC INTERRUPTS............................................................................... 180
20 GENERAL PURPOSE INPUTS / OUTPUTS (GPIO).................................181
20.1 GENERAL DESCRIPTION ........................................................................... 181
20.1.1
20.1.2
20.1.3
CONFIGURING GPIO PINS ..............................................................................................182
INPUT DE-BOUNCE..........................................................................................................183
GPIO INTERRUPTS ..........................................................................................................183
20.2
GPIO ALTERNATE FUNCTIONS................................................................. 184
20.2.1
LIST OF ALTERNATE FUNCTIONS..................................................................................184
20.2.2
SELECTING GPIO ALTERNATE FUNCTIONS .................................................................187
21 VOLTAGE REFERENCES.........................................................................191
21.1
21.2
MAIN REFERENCE (VREF)......................................................................... 191
LOW-POWER REFERENCE........................................................................ 191
22 REAL-TIME CLOCK (RTC)........................................................................192
22.1
22.2
GENERAL DESCRIPTION ........................................................................... 192
RTC CONTROL............................................................................................ 192
22.2.1
22.2.2
22.2.3
22.2.4
22.2.5
MODES OF OPERATION..................................................................................................192
RTC TIME REGISTERS.....................................................................................................192
SETTING THE TIME..........................................................................................................193
RTC ALARM REGISTERS.................................................................................................193
SETTING THE ALARM ......................................................................................................195
22.3
22.4
22.5
TRIMMING THE RTC................................................................................... 195
RTC GPIO OUTPUT..................................................................................... 197
RTC INTERRUPTS ...................................................................................... 198
23 WATCHDOG TIMER..................................................................................199
24 INTERRUPT CONTROLLER.....................................................................201
24.1
24.2
24.3
CONFIGURING THE IRQ PIN...................................................................... 201
FIRST-LEVEL INTERRUPTS ....................................................................... 202
SECOND-LEVEL INTERRUPTS .................................................................. 203
PD, February 2011, Rev 4.4
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
