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