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WM8351CGEB/V Datasheet(PDF) 7 Page - Wolfson Microelectronics plc

Part # WM8351CGEB/V
Description  Wolfson AudioPlus??Stereo CODEC with Power Management
PDF  330 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8351CGEB/V Datasheet(HTML) 7 Page - Wolfson Microelectronics plc

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Production Data
WM8351
w
PD, April 2012, Rev 4.5
7
16.3 
OPEN-DRAIN LED OUTPUTS ....................................................................... 151 
16.4 
LED DRIVER CONNECTIONS....................................................................... 151 
17  POWER SUPPLY CONTROL ................................................................... 152 
17.1 
GENERAL DESCRIPTION ............................................................................. 152 
17.2 
BATTERY POWERED OPERATION ............................................................. 153 
17.3 
WALL ADAPTOR (LINE) POWERED OPERATION....................................... 153 
17.4 
USB POWERED OPERATION....................................................................... 154 
17.5 
EXTERNAL INTERRUPTS............................................................................. 156 
17.6 
BACKUP POWER .......................................................................................... 156 
17.7 
BATTERY CHARGER .................................................................................... 157 
17.7.1
 
GENERAL DESCRIPTION.................................................................................................157
 
17.7.2
 
BATTERY CHARGER ENABLE.........................................................................................159
 
17.7.3
 
TRICKLE CHARGING........................................................................................................159
 
17.7.4
 
FAST CHARGING..............................................................................................................161
 
17.7.5
 
BATTERY CHARGER TIMEOUT AND TERMINATION ....................................................163
 
17.7.6
 
BATTERY CHARGER STATUS.........................................................................................164
 
17.7.7
 
BATTERY FAULT CONDITIONS.......................................................................................165
 
17.7.8
 
INTERRUPTS AND FAULT PROTECTION .......................................................................167
 
18  SYSTEM MONITORING AND UNDERVOLTAGE LOCKOUT (UVLO) .... 168 
19  AUXILIARY ADC....................................................................................... 170 
19.1 
GENERAL DESCRIPTION ............................................................................. 170 
19.2 
INITIATING AUXADC MEASUREMENTS...................................................... 171 
19.3 
VOLTAGE SCALING AND REFERENCES.................................................... 173 
19.4 
AUXADC READBACK .................................................................................... 174 
19.5 
CALIBRATION................................................................................................ 176 
19.6 
DIGITAL COMPARATORS............................................................................. 177 
19.7 
AUXADC INTERRUPTS................................................................................. 178 
20  GENERAL PURPOSE INPUTS / OUTPUTS (GPIO) ................................ 179 
20.1 
GENERAL DESCRIPTION ............................................................................. 179 
20.1.1
 
CONFIGURING GPIO PINS ..............................................................................................180
 
20.1.2
 
INPUT DE-BOUNCE ..........................................................................................................181
 
20.1.3
 
GPIO INTERRUPTS ..........................................................................................................181
 
20.2 
GPIO ALTERNATE FUNCTIONS................................................................... 182 
20.2.1
 
LIST OF ALTERNATE FUNCTIONS..................................................................................182
 
20.2.2
 
SELECTING GPIO ALTERNATE FUNCTIONS .................................................................185
 
21  VOLTAGE REFERENCES ........................................................................ 189 
21.1 
MAIN REFERENCE (VREF)........................................................................... 189 
21.2 
LOW-POWER REFERENCE.......................................................................... 189 
22  REAL-TIME CLOCK (RTC)....................................................................... 190 
22.1 
GENERAL DESCRIPTION ............................................................................. 190 
22.2 
RTC CONTROL.............................................................................................. 190 
22.2.1
 
MODES OF OPERATION ..................................................................................................190
 
22.2.2
 
RTC TIME REGISTERS.....................................................................................................190
 
22.2.3
 
SETTING THE TIME..........................................................................................................191
 
22.2.4
 
RTC ALARM REGISTERS.................................................................................................191
 
22.2.5
 
SETTING THE ALARM ......................................................................................................193
 
22.3 
TRIMMING THE RTC ..................................................................................... 193 
22.4 
RTC GPIO OUTPUT....................................................................................... 194 
22.5 
RTC INTERRUPTS ........................................................................................ 196 
23  WATCHDOG TIMER ................................................................................. 197 
24  INTERRUPT CONTROLLER .................................................................... 199 
24.1 
CONFIGURING THE IRQ PIN........................................................................ 200 
24.2 
FIRST LEVEL INTERRUPTS ......................................................................... 200 



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