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ISD91200 Series Technical Reference Manual
Release Date: Sep 16, 2019
- 116 -
Revision 2.4
5.3.6
Register Description
System Power Control Register
(
CLK_PWRCTL
)
This is a protected register, to write to register,
first issue the unlock sequence.
Register
Offset
R/W
Description
Reset Value
CLK_PWRCTL
0x00 R/W
System Power Control Register
0xXX00_000D
Table 5-36 System Power Control Register
(
CLK_PWRCTL, address 0x5000_0200
)
31
30
29
28
27
26
25
24
Reserved
WKPUEN
PORWKF
TMRWKF
WKPINWKF
23
22
21
20
19
18
17
16
Reserved
FLASHEN
LIRCDPDEN
WKPINEN
15
14
13
12
11
10
9
8
Reserved
IOSTATE
RELEASEIO
HOLDIO
DPDEN
SPDEN
STOPEN
Reserved
7
6
5
4
3
2
1
0
Reserved
HXTEN
LIRCEN
HIRCEN
LXTEN
Reserved
Table 5-37 System Power Control Register (CLK_PWRCTL, address 0x5000_0200) Bit Description.
Bits
Description
[31:27]
Reserved
Reserved.
[27]
WKPUEN
Wakeup Pin Pull-up Control
This signal is latched in deep power down and preserved.
0 = pull-up enable.
1 = tri-state (default).
[26]
PORWKF
POR Wakeup Flag
Read Only. This flag indicates that wakeup of device was requested with a power-on
reset. Flag is cleared when DPD mode is entered.
[25]
TMRWKF
Timer Wakeup Flag
Read Only. This flag indicates that wakeup of device was requested with TIMER
count of the 10khz oscillator. Flag is cleared when DPD mode is entered.
[24]
WKPINWKF
Pin Wakeup Flag
Read Only. This flag indicates that wakeup of device was requested with a high to
low transition of the WAKEUP pin. Flag is cleared when DPD mode is entered.
[23:20]
Reserved
Reserved