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7
WDMOD
Bit symbol
WDTE
(0300H)
Read/Write
R/W
After reset
1
Function
WDT
control
1: Enable
Watchdog timer detection time
SYSCR1
System Clock Selection
<SYSCK>
1 (fs)
0 (fc)
6
5
WDTP1
WDTP0
R/W
0
0
Select detecting time
15
00: 2
/f
SYS
17
01: 2
/f
SYS
19
10: 2
/f
SYS
21
11: 2
/f
SYS
SYSCR1
Gear Value
<GEAR2:0>
XXX
000 (fc)
001 (fc/2)
010 (fc/4)
011 (fc/8)
15.89 ms
100 (fc/16)
31.78 ms
Figure 3.12.4 Watchdog Timer Mode Register
91C824-195
4
3
2
I2WDT
0
IDLE2
0: Stop
1: Operate
Watchdog timer out control
−
0
1
Connects WDT out to a reset
IDLE2 control
0
Stop
1
Operation
at fc = 33 MHz, fs = 32.768 kHz
Watchdog Timer Detection Time
WDMOD<WDTP1:0>
00
01
2.0
s
8.0
s
1.99 ms
7.94 ms
3.97 ms
15.89 ms
7.94 ms
31.78 ms
127.10 ms
63.55 ms
254.20 ms
127.10 ms
508.40 ms
Watchdog timer enable/disable control
0
Disabled
1
Enabled
TMP91C824
1
0
−
RESCR
R/W
R/W
0
0
1: Internally
Always
connects
write 0
WDL out to
the reset
pin
10
11
32.0
s
128.0
s
31.78 ms
127.10 ms
63.55 ms
254.20 ms
508.40 ms
1016.80 ms
2033.60 ms
2008-02-20
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