Figure 9-17 Typical Watchdog Timer Operations (Example)
9.6.4 Watchdog Timer Operation States
Table 9-18 summarizes the watchdog timer operation states.
Table 9-18 Watchdog Timer Operation States
Sub-
Sub-
Module
Operation Mode
Reset
Active
Sleep
Watch
active
sleep
Standby
Standby
TCW
Reset
Functions
Functions
Halted
Functions/ Halted Halted
Halted
Halted
*
TCSRW
Reset
Functions
Functions
Retained Functions/ Retained
Retained Retained
Halted
*
Note:
*
Functions when øw/32 is selected as the input clock.
H'F8
TCW overflow
Start
H'F8 written
in TCW
H'F8 written in TCW
Reset
Internal reset
signal
512 ø
OSC
clock cycles
H'FF
H'00
TCW count
value
238