HA16117FPA RENESAS [Renesas Technology Corp], HA16117FPA Datasheet - Page 26

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

HA16117F Series
Rev.3.00 Jun 15, 2005 page 26 of 30
100 m
10 m
0.56
Reset High Time vs. K (Tadj Constant)
100 k
10 k
1 M
100
P-RUN input pulse duty cycle (%)
1 k
10
1
P-RUN normal frequency range
0.6
0
Duty-cycle dependence of
MPU system abnormal
MPU system abnormal
Abnormal if duty
cycle is 0%
MPU system normal
Tadj constant K
Abnormal if duty
cycle is 100%
50
0.7
100
0.8
5 V
0 V
generator
Notes: 1.
0.01
Pulse
0.01
2.
5 V
Normal detection is assumed when RES is not output.
The figure at left is for a constant P-RUN frequency.
See "8. Summary of cases where P-RUN frequency
fluctuates" for cases where the frequency fluctuates.
5 V
0.1
0.1
V
P-RUN ACC
C
C
V
P-RUN ACC
C
C
Test circuit
Test circuit
CC
F
R
CC
F
R
GND
RES
Tadj
GND
RES
Tadj
Oscilloscope
Oscilloscope
K =
R
750 R
510 R
R
1
2
R
1
R
+ R
2
2