UPD78F0411GA-GAM-AX Datasheet, PDF (288/564 Pages) Renesas Technology Corp – Old Company Name in Catalogs and Other Documents

CHAPTER 10 WATCHDOG TIMER
Remark If the overflow time is set to 2¹⁰/fRL, the window close time and open time are as follows.
Window close time
Window open time
25%
0 to 3.56 ms
3.56 to 3.88 ms
Setting of Window Open Period
50%
75%
100%
0 to 2.37 ms
0 to 0.119 ms
None
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:
2¹⁰/fRL (MAX.) = 2¹⁰/264 kHz (MAX.) = 3.88 ms
• Window close time:
0 to 2¹⁰/fRL (MIN.) × (1 − 0.25) = 0 to 2¹⁰/216 kHz (MIN.) × 0.75 = 0 to 3.56 ms
• Window open time:
2¹⁰/fRL (MIN.) × (1 − 0.25) to 2¹⁰/fRL (MAX.) = 2¹⁰/216 kHz (MIN.) × 0.75 to 2¹⁰/264 kHz (MAX.)
= 3.56 to 3.88 ms
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User’s Manual U18698EJ1V0UD