XC886/888CLM
Watchdog Timer
User’s Manual
9-6
V1.3, 2010-02
Watchdog Timer, V1.0
WDTCON
Watchdog Timer Register
Reset Value: 00
H
7
6
5
4
3
2
1
0
0
WINBEN
WDTPR
0
WDTEN
WDTRS
WDTIN
r
rw
rh
r
rw
rwh
rw
Field
Bits
Type Description
WDTIN
0
rw
Watchdog Timer Input Frequency Selection
0
Input frequency is
f
PCLK
/2
1
Input frequency is
f
PCLK
/128
WDTRS
1
rwh
WDT Refresh Start.
Active high. Set to start refresh operation on the
watchdog timer. Cleared by hardware automatically.
WDTEN
2
rw
WDT Enable.
WDTEN is a protected bit. If the Protection Scheme
(see
) is activated, then this bit
cannot be written directly.
0
WDT is disabled.
1
WDT is enabled.
WDTPR
4
rh
Watchdog Prewarning Mode Flag
This bit is set to 1 when a Watchdog error is
detected. The Watchdog Timer has issued an NMI
trap and is in Prewarning Mode. A reset of the chip
occurs after the prewarning period has expired.
0
Normal mode (default after reset)
1
The Watchdog is operating in Prewarning
Mode
WINBEN
5
rw
Watchdog Window-Boundary Enable.
0
Watchdog Window-Boundary feature is
disabled (default).
1
Watchdog Window-Boundary feature is
enabled.
0
3,
[7:6]
r
Reserved
Returns 0 if read; should be written with 0.
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