upd70f3017ay Renesas Electronics Corporation., upd70f3017ay Datasheet - Page 214

• Manufacturer Part Number: upd70f3017ay
• Description: V850/sa1tm 32-/16-bit Single-chip Microcontroller
• Manufacturer: Renesas Electronics Corporation.

(1) Watchdog timer mode
(2) Interval timer mode
214
This mode detects a program loop. When a loop is detected, a non-maskable interrupt can be generated.
Interrupts are generated at a preset time interval.
2
2
2
2
2
2
2
2
14
15
16
17
18
19
20
22
2
2
2
2
2
2
2
2
14
15
16
17
18
19
20
22
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
/f
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
XX
Clock
Clock
Table 9-1. Loop Detection Time of Watchdog Timer
819.2
1.6 ms
3.3 ms
6.6 ms
13.1 ms
26.2 ms
52.4 ms
209.7 ms
819.2
1.6 ms
3.3 ms
6.6 ms
13.1 ms
26.2 ms
52.4 ms
209.7 ms
Table 9-2. Interval Time of Interval Timer
f
f
XX
XX
= 20 MHz
= 20 MHz
µ
CHAPTER 9
µ
s
s
User’s Manual U12768EJ4V1UD
964
1.928 ms
3.855 ms
7.710 ms
15.42 ms
30.84 ms
61.68 ms
246.7 ms
964
1.928 ms
3.855 ms
7.710 ms
15.42 ms
30.84 ms
61.68 ms
246.7 ms
f
f
XX
XX
WATCHDOG TIMER
µ
= 17 MHz
= 17 MHz
µ
s
s
Loop Detection Time
Interval Time
1.6 ms
3.2 ms
6.6 ms
13.1 ms
26.2 ms
52.4 ms
104.9 ms
419.4 ms
1.6 ms
3.2 ms
6.6 ms
13.1 ms
26.2 ms
52.4 ms
104.9 ms
419.4 ms
f
f
XX
XX
= 10 MHz
= 10 MHz
8.2 ms
16.4 ms
32.8 ms
65.5 ms
131.1 ms
262.1 ms
524.3 ms
2.1 s
8.2 ms
16.4 ms
32.8 ms
65.5 ms
131.1 ms
262.1 ms
524.3 ms
2.1 s
f
f
XX
XX
= 2 MHz
= 2 MHz