wm8351 Wolfson Microelectronics plc, wm8351 Datasheet - Page 7

• Manufacturer Part Number: wm8351
• 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
16.2.5
POWER SUPPLY CONTROL....................................................................152
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) .....168
AUXILIARY ADC........................................................................................170
GENERAL PURPOSE INPUTS / OUTPUTS (GPIO).................................179
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
OPEN-DRAIN LED OUTPUTS ..................................................................... 151
LED DRIVER CONNECTIONS ..................................................................... 151
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
GENERAL DESCRIPTION ........................................................................... 170
INITIATING AUXADC MEASUREMENTS .................................................... 171
VOLTAGE SCALING AND REFERENCES................................................... 173
AUXADC READBACK .................................................................................. 174
CALIBRATION.............................................................................................. 176
DIGITAL COMPARATORS........................................................................... 177
AUXADC INTERRUPTS ............................................................................... 178
GENERAL DESCRIPTION ........................................................................... 179
GPIO ALTERNATE FUNCTIONS ................................................................. 183
MAIN REFERENCE (VREF) ......................................................................... 190
LOW-POWER REFERENCE........................................................................ 190
GENERAL DESCRIPTION ........................................................................... 191
RTC CONTROL............................................................................................ 191
TRIMMING THE RTC ................................................................................... 194
RTC GPIO OUTPUT..................................................................................... 195
RTC INTERRUPTS ...................................................................................... 197
INTERRUPTS AND FAULT PROTECTION ....................................................................... 150
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
CONFIGURING GPIO PINS .............................................................................................. 180
INPUT DE-BOUNCE .......................................................................................................... 181
GPIO INTERRUPTS .......................................................................................................... 181
LIST OF ALTERNATE FUNCTIONS.................................................................................. 183
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
WM8351
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