wm8352 Wolfson Microelectronics plc, wm8352 Datasheet - Page 7
wm8352
Manufacturer Part Number
wm8352
Description
Wolfson Audioplus? Stereo Codec With Power Management
Manufacturer
Wolfson Microelectronics plc
Datasheet
1.WM8352.pdf
(335 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
wm8352GEB
Manufacturer:
WOLFSON
Quantity:
20 000
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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
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