WM8321
Production Data
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
Thermal Warning hysteresis
REFER TO
R16386
(4002h)
Thermal
Monitoring
THW_HYST
3
1
0 = 8 degrees C
1 = 16 degrees C
THW_TEMP
[1:0]
Thermal Warning temperature
00 = 90 degrees C
01 = 100 degrees C
10 = 110 degrees C
11 = 120 degrees C
1:0
10
Register 4002h Thermal Monitoring
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R16387
(4003h)
Power State
CHIP_ON
Indicates whether the system is ON or OFF.
0 = OFF
15
0
1 = ON (or SLEEP)
OFF can be commanded by writing CHIP_ON = 0.
Note that writing CHIP_ON = 1 is not a valid ‘ON’ event,
and will not trigger an ON transition.
CHIP_SLP
REF_LP
Indicates whether the system is in the SLEEP state.
0 = Not in SLEEP
14
0
1 = SLEEP
WAKE can be commanded by writing CHIP_SLP = 0.
SLEEP can be commanded by writing CHIP_SLP = 1.
Low Power Voltage Reference Control
0 = Normal
12
0
1 = Low Power Reference Mode select
Note that Low Power Reference Mode is only supported
when the Auxiliary ADC is disabled.
PWRSTATE_D
LY [1:0]
Power State transition delay
00 = No delay
11:10
10
01 = No delay
10 = 1ms
11 = 10ms
SWRST_DLY
Software Reset Delay
0 = No delay
9
0
1 = Software Reset is delayed by PWRSTATE_DLY
following the Software Reset command
Register 4003h Power State
REGISTER
ADDRESS
BIT
LABEL
DEFAULT
DESCRIPTION
REFER TO
R16388
(4004h)
Watchdog
WDOG_ENA
Watchdog Timer Enable
0 = Disabled
15
1
1 = Enabled (enables the watchdog; does not reset it)
Protected by security key.
Watchdog Pause
WDOG_DEBU
G
14
0
0 = Disabled
1 = Enabled (halts the Watchdog timer for system
debugging)
PD, February 2012, Rev 4.0
146
w
WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
