WM8321
Production Data
17.1 GENERAL DESCRIPTION ............................................................................... 96
17.2 POWER PATH MANAGEMENT INTERRUPTS ............................................... 96
17.3 BACKUP POWER ............................................................................................ 96
18
AUXILIARY ADC ......................................................................................... 97
18.1 GENERAL DESCRIPTION ............................................................................... 97
18.2 AUXADC CONTROL ........................................................................................ 97
18.3 AUXADC READBACK ...................................................................................... 99
18.4 DIGITAL COMPARATORS ............................................................................. 100
18.5 AUXADC INTERRUPTS ................................................................................. 102
19
RESERVED ............................................................................................... 103
20
REAL-TIME CLOCK (RTC) ....................................................................... 104
20.1 GENERAL DESCRIPTION ............................................................................. 104
20.2 RTC CONTROL .............................................................................................. 104
20.3 RTC INTERRUPTS ........................................................................................ 106
20.4 DIGITAL RIGHTS MANAGEMENT ................................................................ 107
20.5 BACKUP MODE CLOCKING OPTIONS ........................................................ 107
21
GENERAL PURPOSE INPUTS / OUTPUTS (GPIO) ................................ 108
21.1 GENERAL DESCRIPTION ............................................................................. 108
21.2 GPIO FUNCTIONS ......................................................................................... 108
21.3 CONFIGURING GPIO PINS ........................................................................... 110
21.4 GPIO INTERRUPTS ....................................................................................... 114
22
SYSTEM STATUS LED DRIVERS ............................................................ 115
22.1 GENERAL DESCRIPTION ............................................................................. 115
22.2 LED DRIVER CONTROL................................................................................ 115
22.2.1
OTP PROGAM STATUS .................................................................................................... 115
22.2.2
POWER STATE STATUS .................................................................................................. 116
22.2.3
MANUAL MODE................................................................................................................. 116
22.3 LED DRIVER CONNECTIONS....................................................................... 118
23
INTERRUPT CONTROLLER .................................................................... 119
23.1 PRIMARY INTERRUPTS ............................................................................... 120
23.2 SECONDARY INTERRUPTS ......................................................................... 122
23.2.1
POWER STATE INTERRUPT ............................................................................................ 122
23.2.2
THERMAL INTERRUPTS .................................................................................................. 123
23.2.3
GPIO INTERRUPTS .......................................................................................................... 123
23.2.4
ON PIN INTERRUPTS ....................................................................................................... 123
23.2.5
WATCHDOG INTERRUPTS .............................................................................................. 124
23.2.6
AUXADC INTERRUPTS .................................................................................................... 124
23.2.7
POWER PATH MANAGEMENT INTERRUPTS ................................................................. 124
23.2.8
REAL TIME CLOCK AND CRYSTAL OSCILLATOR INTERRUPTS ................................. 125
23.2.9
OTP MEMORY INTERRUPTS ........................................................................................... 126
23.2.10
HIGH CURRENT INTERRUPTS ........................................................................................ 126
23.2.11
UNDERVOLTAGE INTERRUPTS ...................................................................................... 127
24
RESETS AND SUPPLY VOLTAGE MONITORING .................................. 128
24.1 RESETS ......................................................................................................... 128
24.2 HARDWARE RESET ...................................................................................... 130
24.3 SOFTWARE RESET ...................................................................................... 130
24.4 SUPPLY VOLTAGE MONITORING ............................................................... 132
25
WATCHDOG TIMER ................................................................................. 134
26
TEMPERATURE SENSING ...................................................................... 136
27
VOLTAGE AND CURRENT REFERENCES ............................................. 137
27.1 VOLTAGE REFERENCE (VREF) ................................................................... 137
27.2 CURRENT REFERENCE (IREF) ................................................................... 137
w
PD, February 2012, Rev 4.0
6
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
