WM8325
Production Data
17.1
17.2
17.3
GENERAL DESCRIPTION............................................................................... 97
POWER PATH MANAGEMENT INTERRUPTS............................................... 97
BACKUP POWER ............................................................................................ 97
18 AUXILIARY ADC......................................................................................... 98
18.1
18.2
18.3
18.4
18.5
GENERAL DESCRIPTION............................................................................... 98
AUXADC CONTROL ........................................................................................ 98
AUXADC READBACK...................................................................................... 99
DIGITAL COMPARATORS............................................................................. 101
AUXADC INTERRUPTS................................................................................. 103
19 RESERVED............................................................................................... 104
20 REAL-TIME CLOCK (RTC)....................................................................... 105
20.1
20.2
20.3
20.4
20.5
GENERAL DESCRIPTION............................................................................. 105
RTC CONTROL.............................................................................................. 105
RTC INTERRUPTS ........................................................................................ 107
DIGITAL RIGHTS MANAGEMENT ................................................................ 108
BACKUP MODE CLOCKING OPTIONS ........................................................ 108
21 GENERAL PURPOSE INPUTS / OUTPUTS (GPIO) ................................ 109
21.1
21.2
21.3
21.4
GENERAL DESCRIPTION............................................................................. 109
GPIO FUNCTIONS......................................................................................... 109
CONFIGURING GPIO PINS........................................................................... 111
GPIO INTERRUPTS....................................................................................... 115
22 SYSTEM STATUS LED DRIVERS............................................................ 116
22.1
22.2
GENERAL DESCRIPTION............................................................................. 116
LED DRIVER CONTROL................................................................................ 116
22.2.1
22.2.2
22.2.3
OTP PROGAM STATUS....................................................................................................116
POWER STATE STATUS..................................................................................................117
MANUAL MODE.................................................................................................................117
22.3
LED DRIVER CONNECTIONS....................................................................... 119
23 INTERRUPT CONTROLLER .................................................................... 120
23.1
23.2
PRIMARY INTERRUPTS ............................................................................... 121
SECONDARY INTERRUPTS......................................................................... 123
23.2.1
23.2.2
POWER STATE INTERRUPT............................................................................................123
THERMAL INTERRUPTS ..................................................................................................123
GPIO INTERRUPTS ..........................................................................................................125
ON PIN INTERRUPTS.......................................................................................................125
WATCHDOG INTERRUPTS..............................................................................................126
AUXADC INTERRUPTS ....................................................................................................126
POWER PATH MANAGEMENT INTERRUPTS.................................................................127
REAL TIME CLOCK AND CRYSTAL OSCILLATOR INTERRUPTS .................................127
OTP MEMORY INTERRUPTS...........................................................................................128
23.2.3
23.2.4
23.2.5
23.2.6
23.2.7
23.2.8
23.2.9
23.2.10 HIGH CURRENT INTERRUPTS........................................................................................128
23.2.11 UNDERVOLTAGE INTERRUPTS......................................................................................129
24 RESETS AND SUPPLY VOLTAGE MONITORING.................................. 130
24.1
24.2
24.3
24.4
RESETS ......................................................................................................... 130
HARDWARE RESET...................................................................................... 132
SOFTWARE RESET ...................................................................................... 132
SUPPLY VOLTAGE MONITORING ............................................................... 134
25 WATCHDOG TIMER ................................................................................. 136
26 TEMPERATURE SENSING ...................................................................... 138
27 VOLTAGE AND CURRENT REFERENCES............................................. 139
27.1
27.2
VOLTAGE REFERENCE (VREF)................................................................... 139
CURRENT REFERENCE (IREF) ................................................................... 139
PD, February 2012, Rev 4.0
6
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
