HA16117FPA RENESAS [Renesas Technology Corp], HA16117FPA Datasheet - Page 15

• Manufacturer Part Number: HA16117FPA
• Description: CMOS Watchdog Timer
• Manufacturer: RENESAS [Renesas Technology Corp]

HA16117F Series
8. Summary of cases where P-RUN frequency fluctuates
Rev.3.00 Jun 15, 2005 page 15 of 30
If there is a double-pulse in P-RUN, RES may be output if the double-pulse has multiple frequency
components. If the P-RUN frequency fluctuates, refer to the following when making the P-RUN
setting.
P-RUN normal detection region, duty dependency
f
P-RUN
Note: 2. This is the region when f
100 k
10 k
1 M
100
1 k
10
1
5
4
3
2
1
0
dependency of V
0
1 k
If f
Normal detection is performed when the condition f
Multivibrator threshold voltage (1.6 V)
P-RUN
fluctuates within the normal detection region, the following applies:
3 k
CR
, t
Normal detection region*
P-RUN pulse duty D (%)
OFF
5 k
P-RUN frequency (Hz)
, M
P-RUN
7 k
50
10 k
is constant.
2
30 k
50 k 70 k 100 k
P-RUN H
/f
P-RUN L
100
When f
t
so care is required when
making the P-RUN setting
(see figure below).
Note: 1
OFF
< M is satisfied.
t
(s)
100 m
50 m
0
is frequency-dependent,
OFF
P-RUN
3
2 M
1
20 kHz,