Datasheet

78K0/Kx2-L CHAPTER 9 WATCHDOG TIMER
R01UH0028EJ0400 Rev.4.00 369
Sep 27, 2010
Remark If the overflow time is set to 2
17
/fIL, the window close time and open time are as follows.
Setting of Window Open Period
25% 50% 75% 100%
Window close time 0 to 3.64 s 0 to 2.43 s 0 to 1.21 s None
Window open time 3.64 to 3.97 s 2.43 to 3.97 s 1.21 to 3.97 s 0 to 3.97 s
<When window open period is 25%>
• Overflow time:
2
17
/fIL (MAX.) = 2
17
/33 kHz (MAX.) = 3.97 s
• Window close time:
0 to 2
17
/fIL (MIN.) × (1 − 0.25) = 0 to 2
17
/27 kHz (MIN.) × 0.75 = 0 to 3.64 s
• Window open time:
2
17
/fIL (MIN.) × (1 − 0.25) to 2
17
/fIL (MAX.) = 2
17
/fIL /27 kHz (MIN.) × 0.75 to 2
17
/33 kHz (MAX.)
= 3.64 to 3.97 s