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NuMicro® NUC029LEE/NUC029SEE
32-bit Arm
®
Cortex
®
-M0 Microcontroller
Aug, 2018
Page
309
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497
Rev 1.00
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UC029
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ICA
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Window Watchdog Timer Control Register (WWDTCR)
Register
Offset
R/W
Description
Reset Value
WWDTCR
0x04 R/W
Window Watchdog Timer Control Register
0x003F_0800
Note:
This register can be written only one time after chip is powered on or reset.
31
30
29
28
27
26
25
24
DBGACK_
WWDT
Reserved
23
22
21
20
19
18
17
16
Reserved
WINCMP
15
14
13
12
11
10
9
8
Reserved
PERIODSEL
7
6
5
4
3
2
1
0
Reserved
WWDTIE
WWDTEN
Bits
Description
[31]
DBGACK_WWDT
ICE Debug Mode Acknowledge Disable Bit
0 = ICE debug mode acknowledgement effects WWDT counting.
WWDT down counter will be held while CPU is held by ICE.
1 = ICE debug mode acknowledgement Disabled.
WWDT down counter will keep going no matter CPU is held by ICE or not.
[30:22]
Reserved
Reserved.
[21:16]
WINCMP
WWDT Window Compare Register
Set this register to adjust the valid reload window.
Note:
User can only write WWDTRLD to reload WWDT counter value when current
WWDT counter value between 0 and WINCMP. If user writes WWDTRLD when
current WWDT counter value larger than WINCMP, WWDT reset signal will generate
immediately.
[15:12]
Reserved
Reserved.
[11:8]
PERIODSEL
WWDT Counter Prescale Period Selection
0000 = Pre-scale is 1; Max time-out period is 1 * 64 * TWWDT.
0001 = Pre-scale is 2; Max time-out period is 2 * 64 * TWWDT.
0010 = Pre-scale is 4; Max time-out period is 4 * 64 * TWWDT.
0011 = Pre-scale is 8; Max time-out period is 8 * 64 * TWWDT.
0100 = Pre-scale is 16; Max time-out period is 16 * 64 * TWWDT.
0101 = Pre-scale is 32; Max time-out period is 32 * 64 * TWWDT.
0110 = Pre-scale is 64; Max time-out period is 64 * 64 * TWWDT.
0111 = Pre-scale is 128; Max time-out period is 128 * 64 * TWWDT.
1000 = Pre-scale is 192; Max time-out period is 192 * 64 * TWWDT.
1001 = Pre-scale is 256; Max time-out period is 256 * 64 * TWWDT.
1010 = Pre-scale is 384; Max time-out period is 384 * 64 * TWWDT.
1011 = Pre-scale is 512; Max time-out period is 512 * 64 * TWWDT.