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