Production Data
WM8352
OPEN-DRAIN LED OUTPUTS ..................................................................... 151
LED DRIVER CONNECTIONS..................................................................... 151
16.3
16.4
17 POWER SUPPLY CONTROL....................................................................152
17.1
17.2
17.3
17.4
17.5
17.6
17.7
GENERAL DESCRIPTION ........................................................................... 152
BATTERY POWERED OPERATION............................................................ 153
WALL ADAPTOR (LINE) POWERED OPERATION..................................... 153
USB POWERED OPERATION..................................................................... 154
EXTERNAL INTERRUPTS........................................................................... 156
BACKUP POWER ........................................................................................ 156
BATTERY CHARGER .................................................................................. 157
17.7.1
17.7.2
GENERAL DESCRIPTION.................................................................................................157
BATTERY CHARGER ENABLE.........................................................................................159
TRICKLE CHARGING........................................................................................................159
FAST CHARGING..............................................................................................................161
BATTERY CHARGER TIMEOUT AND TERMINATION.....................................................163
BATTERY CHARGER STATUS.........................................................................................164
BATTERY FAULT CONDITIONS.......................................................................................165
INTERRUPTS AND FAULT PROTECTION .......................................................................167
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).....168
19 AUXILIARY ADC........................................................................................170
19.1
19.2
19.3
19.4
19.5
19.6
19.7
GENERAL DESCRIPTION ........................................................................... 170
INITIATING AUXADC MEASUREMENTS .................................................... 171
VOLTAGE SCALING AND REFERENCES................................................... 173
AUXADC READBACK .................................................................................. 174
CALIBRATION.............................................................................................. 176
DIGITAL COMPARATORS........................................................................... 177
AUXADC INTERRUPTS............................................................................... 178
20 GENERAL PURPOSE INPUTS / OUTPUTS (GPIO).................................179
20.1 GENERAL DESCRIPTION ........................................................................... 179
20.1.1
20.1.2
20.1.3
CONFIGURING GPIO PINS ..............................................................................................180
INPUT DE-BOUNCE..........................................................................................................181
GPIO INTERRUPTS ..........................................................................................................181
20.2
GPIO ALTERNATE FUNCTIONS................................................................. 182
20.2.1
LIST OF ALTERNATE FUNCTIONS..................................................................................182
20.2.2
SELECTING GPIO ALTERNATE FUNCTIONS .................................................................184
21 VOLTAGE REFERENCES.........................................................................188
21.1
21.2
MAIN REFERENCE (VREF)......................................................................... 188
LOW-POWER REFERENCE........................................................................ 188
22 REAL-TIME CLOCK (RTC)........................................................................189
22.1
22.2
GENERAL DESCRIPTION ........................................................................... 189
RTC CONTROL............................................................................................ 189
22.2.1
22.2.2
22.2.3
22.2.4
22.2.5
MODES OF OPERATION..................................................................................................189
RTC TIME REGISTERS.....................................................................................................189
SETTING THE TIME..........................................................................................................190
RTC ALARM REGISTERS.................................................................................................190
SETTING THE ALARM ......................................................................................................192
22.3
22.4
22.5
TRIMMING THE RTC................................................................................... 192
RTC GPIO OUTPUT..................................................................................... 194
RTC INTERRUPTS ...................................................................................... 195
23 WATCHDOG TIMER..................................................................................196
24 INTERRUPT CONTROLLER.....................................................................198
24.1
CONFIGURING THE IRQ PIN...................................................................... 198
PD, February 2011, Rev 4.4
7
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
