HA16117F Series
Reset High Time vs. K (Tadj Constant)
100 m
R1
R2
VCC
Tadj
5 V
P-RUN ACC
CF
CR
GND
RES
0.01 µ
0.1 µ
10 m
0.56 0.6
0.7
0.8
Oscilloscope
K =
Tadj constant K
R2
R1 + R2
Test circuit
Duty-cycle dependence of
P-RUN normal frequency range
1 M
MPU system abnormal
100 k
10 k
1 k
510 R
750 R
5 V
Abnormal if duty
cycle is 0%
VCC
Tadj
Pulse
generator
P-RUN ACC
CF
CR
GND
RES
5 V
0 V
MPU system normal
0.01 µ
0.1 µ
Abnormal if duty
cycle is 100%
100
10
Oscilloscope
Test circuit
MPU system abnormal
1
Notes: 1. Normal detection is assumed when RES is not output.
0
50
100
2. 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.
P-RUN input pulse duty cycle (%)
26
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