wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 7

• Manufacturer Part Number: wm8352
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
17
18
19
20
21
22
23
24
w
16.3
16.4
17.1
17.2
17.3
17.4
17.5
17.6
17.7
19.1
19.2
19.3
19.4
19.5
19.6
19.7
20.1
20.2
21.1
21.2
22.1
22.2
22.3
22.4
22.5
24.1
POWER SUPPLY CONTROL....................................................................154
17.7.1
17.7.2
17.7.3
17.7.4
17.7.5
17.7.6
17.7.7
17.7.8
SYSTEM MONITORING AND UNDERVOLTAGE LOCKOUT (UVLO) .....170
AUXILIARY ADC........................................................................................172
GENERAL PURPOSE INPUTS / OUTPUTS (GPIO).................................181
20.1.1
20.1.2
20.1.3
20.2.1
20.2.2
VOLTAGE REFERENCES.........................................................................190
REAL-TIME CLOCK (RTC)........................................................................191
22.2.1
22.2.2
22.2.3
22.2.4
22.2.5
WATCHDOG TIMER..................................................................................198
INTERRUPT CONTROLLER .....................................................................200
OPEN-DRAIN LED OUTPUTS ..................................................................... 153
LED DRIVER CONNECTIONS ..................................................................... 153
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
GENERAL DESCRIPTION ........................................................................... 172
INITIATING AUXADC MEASUREMENTS .................................................... 173
VOLTAGE SCALING AND REFERENCES................................................... 175
AUXADC READBACK .................................................................................. 176
CALIBRATION.............................................................................................. 178
DIGITAL COMPARATORS........................................................................... 179
AUXADC INTERRUPTS ............................................................................... 180
GENERAL DESCRIPTION ........................................................................... 181
GPIO ALTERNATE FUNCTIONS ................................................................. 184
MAIN REFERENCE (VREF) ......................................................................... 190
LOW-POWER REFERENCE........................................................................ 190
GENERAL DESCRIPTION ........................................................................... 191
RTC CONTROL............................................................................................ 191
TRIMMING THE RTC ................................................................................... 194
RTC GPIO OUTPUT..................................................................................... 196
RTC INTERRUPTS ...................................................................................... 197
CONFIGURING THE IRQ PIN...................................................................... 200
GENERAL DESCRIPTION................................................................................................. 159
BATTERY CHARGER ENABLE......................................................................................... 161
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
CONFIGURING GPIO PINS .............................................................................................. 182
INPUT DE-BOUNCE .......................................................................................................... 183
GPIO INTERRUPTS .......................................................................................................... 183
LIST OF ALTERNATE FUNCTIONS.................................................................................. 184
SELECTING GPIO ALTERNATE FUNCTIONS ................................................................. 186
MODES OF OPERATION .................................................................................................. 191
RTC TIME REGISTERS..................................................................................................... 191
SETTING THE TIME .......................................................................................................... 192
RTC ALARM REGISTERS................................................................................................. 192
SETTING THE ALARM ...................................................................................................... 194
PD, June 2009, Rev 4.1
WM8352
7