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WM8352 Datasheet(PDF) 7 Page - Wolfson Microelectronics plc

Part # WM8352
Description  Wolfson AudioPlus™ Stereo CODEC with Power Management
PDF  336 Pages
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Manufacturer  WOLFSON [Wolfson Microelectronics plc]
Direct Link  http://www.wolfsonmicro.com
Logo WOLFSON - Wolfson Microelectronics plc

WM8352 Datasheet(HTML) 7 Page - Wolfson Microelectronics plc

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Production Data
WM8352
w
PD, February 2011, Rev 4.4
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 ................................................................. 184
21
VOLTAGE REFERENCES.........................................................................188
21.1
MAIN REFERENCE (VREF) ......................................................................... 188
21.2
LOW-POWER REFERENCE........................................................................ 188
22
REAL-TIME CLOCK (RTC)........................................................................189
22.1
GENERAL DESCRIPTION ........................................................................... 189
22.2
RTC CONTROL............................................................................................ 189
22.2.1
MODES OF OPERATION .................................................................................................. 189
22.2.2
RTC TIME REGISTERS..................................................................................................... 189
22.2.3
SETTING THE TIME .......................................................................................................... 190
22.2.4
RTC ALARM REGISTERS................................................................................................. 190
22.2.5
SETTING THE ALARM ...................................................................................................... 192
22.3
TRIMMING THE RTC ................................................................................... 192
22.4
RTC GPIO OUTPUT..................................................................................... 194
22.5
RTC INTERRUPTS ...................................................................................... 195
23
WATCHDOG TIMER..................................................................................196
24
INTERRUPT CONTROLLER .....................................................................198
24.1
CONFIGURING THE IRQ PIN...................................................................... 198



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