wm8350 Wolfson Microelectronics plc, wm8350 Datasheet - Page 7

• Manufacturer Part Number: wm8350
• Description: Wolfson Audioplus? Stereo Codec With Power Management
• Manufacturer: Wolfson Microelectronics plc

Production Data
17
18
19
20
21
22
23
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
16.2.4
16.2.5
POWER SUPPLY CONTROL ................................................................... 156
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) .... 172
AUXILIARY ADC....................................................................................... 174
GENERAL PURPOSE INPUTS / OUTPUTS (GPIO) ................................ 183
20.1.1
20.1.2
20.1.3
20.2.1
20.2.2
VOLTAGE REFERENCES ........................................................................ 193
REAL-TIME CLOCK (RTC)....................................................................... 194
22.2.1
22.2.2
22.2.3
22.2.4
22.2.5
WATCHDOG TIMER ................................................................................. 201
OPEN-DRAIN LED OUTPUTS ....................................................................... 155
LED DRIVER CONNECTIONS....................................................................... 155
GENERAL DESCRIPTION ............................................................................. 156
BATTERY POWERED OPERATION ............................................................. 157
WALL ADAPTOR (LINE) POWERED OPERATION....................................... 157
USB POWERED OPERATION....................................................................... 158
EXTERNAL INTERRUPTS............................................................................. 160
BACKUP POWER .......................................................................................... 160
BATTERY CHARGER .................................................................................... 161
GENERAL DESCRIPTION ............................................................................. 174
INITIATING AUXADC MEASUREMENTS...................................................... 175
VOLTAGE SCALING AND REFERENCES .................................................... 177
AUXADC READBACK .................................................................................... 178
CALIBRATION................................................................................................ 180
DIGITAL COMPARATORS............................................................................. 181
AUXADC INTERRUPTS................................................................................. 182
GENERAL DESCRIPTION ............................................................................. 183
GPIO ALTERNATE FUNCTIONS................................................................... 186
MAIN REFERENCE (VREF)........................................................................... 193
LOW-POWER REFERENCE.......................................................................... 193
GENERAL DESCRIPTION ............................................................................. 194
RTC CONTROL.............................................................................................. 194
TRIMMING THE RTC ..................................................................................... 197
RTC GPIO OUTPUT....................................................................................... 199
RTC INTERRUPTS ........................................................................................ 200
ON/OFF RAMP TIMING.....................................................................................................154
INTERRUPTS AND FAULT PROTECTION .......................................................................154
GENERAL DESCRIPTION.................................................................................................161
BATTERY CHARGER ENABLE.........................................................................................162
TRICKLE CHARGING........................................................................................................163
FAST CHARGING..............................................................................................................165
BATTERY CHARGER TIMEOUT AND TERMINATION .................................................... 167
BATTERY CHARGER STATUS.........................................................................................168
BATTERY FAULT CONDITIONS.......................................................................................169
INTERRUPTS AND FAULT PROTECTION .......................................................................171
CONFIGURING GPIO PINS ..............................................................................................184
INPUT DE-BOUNCE ..........................................................................................................185
GPIO INTERRUPTS ..........................................................................................................185
LIST OF ALTERNATE FUNCTIONS..................................................................................186
SELECTING GPIO ALTERNATE FUNCTIONS .................................................................189
MODES OF OPERATION ..................................................................................................194
RTC TIME REGISTERS.....................................................................................................194
SETTING THE TIME ..........................................................................................................195
RTC ALARM REGISTERS.................................................................................................195
SETTING THE ALARM ......................................................................................................197
PD, June 2009, Rev 4.1
WM8350
7