ISD94100 Series Technical Reference Manual
Sep 9, 2019
Page
540
of 928
Rev1.09
IS
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S
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IE
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C
HN
ICA
L
RE
F
E
RE
NCE
M
AN
U
AL
WWDT Control Register (WWDT_CTL)
Register
Offset
R/W Description
Reset Value
WWDT_CTL
0x04
R/W WWDT Control Register
0x003F_0800
Note:
This register can be write only one time after chip is powered on or reset.
31
30
29
28
27
26
25
24
ICEDEBUG
Reserved
23
22
21
20
19
18
17
16
Reserved
CMPDAT
15
14
13
12
11
10
9
8
Reserved
PSCSEL
7
6
5
4
3
2
1
0
Reserved
INTEN
WWDTEN
Bits
Description
[31]
ICEDEBUG
ICE Debug Mode Acknowledge Disable Control
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. Any values read should be ignored. When writing to this field always write
with reset value.
[21:16]
CMPDAT
WWDT Window Compare Register
Set this register to adjust the valid reload window.
Note:
User can only write WWDT_RLDCNT register to reload WWDT counter value
when current WWDT counter value between 0 and CMPDAT. If user writes
WWDT_RLDCNT register when current WWDT counter value larger than CMPDAT,
WWDT reset signal will generate immediately.
[15:12]
Reserved
Reserved. Any values read should be ignored. When writing to this field always write
with reset value.
[11:8]
PSCSEL
WWDT Counter Prescale Period Selection
0000 = Pre-scale is 1; Max time-out period is 1 * 64 * WWDT_CLK.
0001 = Pre-scale is 2; Max time-out period is 2 * 64 * WWDT_CLK.
0010 = Pre-scale is 4; Max time-out period is 4 * 64 * WWDT_CLK.
0011 = Pre-scale is 8; Max time-out period is 8 * 64 * WWDT_CLK.
0100 = Pre-scale is 16; Max time-out period is 16 * 64 * WWDT_CLK.
0101 = Pre-scale is 32; Max time-out period is 32 * 64 * WWDT_CLK.
0110 = Pre-scale is 64; Max time-out period is 64 * 64 * WWDT_CLK.
0111 = Pre-scale is 128; Max time-out period is 128 * 64 * WWDT_CLK.
1000 = Pre-scale is 192; Max time-out period is 192 * 64 * WWDT_CLK.
1001 = Pre-scale is 256; Max time-out period is 256 * 64 * WWDT_CLK.
1010 = Pre-scale is 384; Max time-out period is 384 * 64 * WWDT_CLK.