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CHAPTER 12 WATCHDOG TIMER
Table 12.1-1 Interval Time of Watchdog Timer
Main
Clock cycle
Examples calculated
External clock(@4MHz) CR oscillation
Min. Max.
Min.
(@200kHz)
Max.
(@50kHz)
2
14
± 2
11
/HCLK
Approx.
3.58 ms
Approx.
4.61 ms
Approx.
0.072 s
Approx.
0.369 s
2
16
± 2
13
/HCLK
Approx.
14.33 ms
Approx.
18.4 ms
Approx.
0.287 s
Approx.
1.475 s
2
18
± 2
15
/HCLK
Approx.
57.34 ms
Approx.
73.73 ms
Approx.
1.147 s
Approx.
5.898 s
2
21
± 2
18
/HCLK
Approx.
458.75 ms
Approx.
589.82 ms
Approx.
9.175 s
Approx.
47.186 s
Sub
Clock cycle
Examples calculated
External clock
(@32kHz, 4-frequency division)
CR oscillation
Min. Max.
Min.
(@200kHz)
Max.
(@50kHz)
2
12
± 2
9
/SCLK
Approx.
0.437 s
Approx.
0.563 s
Approx.
0.018 s
Approx.
0.092 s
2
15
± 2
12
/SCLK
Approx.
3.500 s
Approx.
4.500 s
Approx.
0.143 s
Approx.
0.737 s
2
16
± 2
13
/SCLK
Approx.
7.000 s
Approx.
9.000 s
Approx.
0.287 s
Approx.
1.475 s
2
17
± 2
14
/SCLK
Approx.
14.000 s
Approx.
18.000 s
Approx.
0.573 s
Approx.
2.949 s
Note: See "CHAPTER 6 CLOCK SUPERVISOR" for the CR oscillation.