Production Data
WM8321
The ON Source and OFF Source register fields are defined in Table 2.
ADDRESS
BIT
LABEL
CHIP_ON
DEFAULT
DESCRIPTION
R16387
(4003h)
Indicates whether the system is
ON or OFF.
15
0
Power State
0 = OFF
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
Indicates whether the system is in
the SLEEP state.
14
0
0 = Not in SLEEP
1 = SLEEP
WAKE can be commanded by
writing CHIP_SLP = 0.
SLEEP can be commanded by
writing CHIP_SLP = 1.
PWRSTATE_DLY
Power State transition delay
00 = No delay
11:10
10
01 = No delay
10 = 1ms
11 = 10ms
R16398
(400Eh)
ON_TRANS
ON_GPIO
Most recent ON/WAKE event type
0 = WAKE transition
15
11
10
0
0
0
ON Source
1 = ON transition
Most recent ON/WAKE event type
0 = Not caused by GPIO input
1 = Caused by GPIO input
Most recent WAKE event type
0 = Not caused by PVDD
ON_SYSLO
1 = Caused by SYSLO threshold.
Note that the SYSLO threshold
cannot trigger an ON event.
7
6
ON_WDOG_TO
ON_SW_REQ
0
0
Most recent WAKE event type
0 = Not caused by Watchdog timer
1 = Caused by Watchdog timer
Most recent WAKE event type
0 = Not caused by software WAKE
1 = Caused by software WAKE
command (CHIP_SLP = 0)
ON_RTC_ALM
ON_ON_PIN
Most recent ON/WAKE event type
0 = Not caused by RTC Alarm
1 = Caused by RTC Alarm
5
4
3
0
0
0
Most recent ON/WAKE event type
0 = Not caused by the ON pin
1 = Caused by the ON pin
RESET_CNV_UV
Most recent ON event type
0 = Not caused by undervoltage
1 = Caused by a Device Reset due
to a Converter (LDO or DC-DC)
undervoltage condition
RESET_SW
Most recent ON event type
2
0
0 = Not caused by Software Reset
1 = Caused by Software Reset
PD, February 2012, Rev 4.0
33
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WOLFSON [ WOLFSON MICROELECTRONICS PLC ]
