NUC970 Technical Reference Manual
Publication Release Date: Dec. 15, 2015
- 407 -
Revision V1.30
NUC97
0
T
E
CHNIC
A
L
RE
F
E
RE
N
CE
MA
NUA
L
RTC Power Control Register (RTC_PWRCTL)
Register
Offset
R/W
Description
Reset Value
RTC_PWRCTL
0x034
R/W
RTC Power Control Register
0x0000_7000
31
30
29
28
27
26
25
24
Reserved
ALARM_MODE
RELALM_TIME
23
22
21
20
19
18
17
16
RELALM_TIME
15
14
13
12
11
10
9
8
PWROFF_TIME
PWRON_TIME
7
6
5
4
3
2
1
0
PWR_KEY
Reserved
EDGE_TRIG REL_ALARM_EN ALARM_EN HW_PCLR_EN SW_PCLR
PWR_ON
Bits
Description
[31:29]
Reserved
Reserved.
[28]
ALARM_MODE
Alarm Function Mode Selection
This bit controls if pin SYS_PWREN be forced to low when RTC Time and Date
counter or relative alarm counter meets the alarm condition.
0 =Pin SYS_PWREN be forced to low by alarm function Disabled.
1 = Pin SYS_PWREN be forced to low by alarm function Enabled.
[27:16]
RELALM_TIME
Relative Alarm Time
This field defines the relative alarm time period by unit second. The maximum value
is 12
’d1800.
[15:12]
PWROFF_TIME
Power Off Time
This field defines the time from SYS_nWAKEUP pressed to SYS_PWREN low. The
time unit is second. And, the actual power-off time is the PWRO4.
[11:8]
PWRON_TIME
Power on Time
This field defines the period that SYS_nWAKEUP pressed to SYS_PWREN high.
The time unit is second.
[7]
PWR_KEY
Pin SYS_NWAKEUP Status
This bit reflects the SYS_nWAKEUP pin status.
[6]
Reserved
Reserved.
[5]
EDGE_TRIG
SYS_NWAKEUP Pin Trigger Mode
0 = Level trigger mode. SYS_PWREN is high when SYS_nWAKEUP pressed longer
than PWRON_TIME.
1 = Edge trigger mode. SYS_PWREN is high when SYS_nWAKEUP pressed longer
than PWRON_TIME and then released.