MC68HC05F8 Datasheet, PDF (63/126 Pages) Motorola, Inc – High-density complementary metal oxide semiconductor(HCMOS) microcontroller unit

Freescale Semiconductor, Inc.
KWDT - Kill Watchdog Timer Bit
1 (set) – Enable watchdog “kill” feature.
0 (clear) – Disable watchdog “kill” feature.
When this watchdog “kill” feature is set by writing a logic “1” to this bit immediately after a reset,
the watchdog timer will be disabled when the MCU in Stop or Wait mode. The default for the
watchdog timer “kill” feature at reset is disabled.
Reading this bit will show the value of first write after Reset or the default value upon reset.
WDTOF - Watchdog Timer Time-out Flag
1 (set) – A watchdog timer time-out has occurred.
0 (clear) – A watchdog timer time-out has not occurred.
This flag is cleared by writing a logic “0” to this bit. Writing a logic “1” to this bit will reset the
watchdog timer counter, and hence avoiding a watchdog time-out. The write does not affect the
6
time-out flag.
WDT1, WDT0 - Time-out Period Select
WDT1
0
0
1
1
WDT0
0
1
0
1
Time-Out Period
Min. (s)
Max. (s)
0.25
0.5
0.75
1.0
1.75
2.0
3.75
4.0
MC68HC05F8
TIMERS
For More Information On This Product,
Go to: www.freescale.com
TPG
MOTOROLA
6-15