Datasheet

CHAPTER 10 WATCHDOG TIMER
User’s Manual U18698EJ1V0UD
286
Remark If the overflow time is set to 2
10
/fRL, the window close time and open time are as follows.
Setting of Window Open Period
25% 50% 75% 100%
Window close time 0 to 3.56 ms 0 to 2.37 ms 0 to 0.119 ms None
Window open time 3.56 to 3.88 ms 2.37 to 3.88 ms 0.119 to 3.88 ms 0 to 3.88 ms
<When window open period is 25%>
• Overflow time:
2
10
/fRL (MAX.) = 2
10
/264 kHz (MAX.) = 3.88 ms
• Window close time:
0 to 2
10
/fRL (MIN.) × (1 − 0.25) = 0 to 2
10
/216 kHz (MIN.) × 0.75 = 0 to 3.56 ms
• Window open time:
2
10
/fRL (MIN.) × (1 − 0.25) to 2
10
/fRL (MAX.) = 2
10
/216 kHz (MIN.) × 0.75 to 2
10
/264 kHz (MAX.)
= 3.56 to 3.88 ms