參數(shù)資料
型號(hào): HA16117F
廠商: Hitachi,Ltd.
英文描述: CMOS Watchdog Timer
中文描述: 看門狗定時(shí)器的CMOS
文件頁數(shù): 13/31頁
文件大?。?/td> 249K
代理商: HA16117F
HA16117F Series
13
6. When P-RUN frequency fluctuates (1)
H
L
H
L
H
L
H
L
H
L
H
L
H
L
H
L
0 V
1.6 V
3.2 V
5 V
0 V
0.9 V
3.6 V
5 V
P-RUN
28 ms
Q
A
C
F
WD
C
R
B
C
20 ms
2 ms
If there is a double-pulse in P-RUN, the WD filter duty will be decreased and RES will be
output, as shown in the figure below, for example. In this case, the condition for non-output of
the RES signal is a value of 3 or less for the ratio of P-RUN pulse interval minimum value to
maximum value (when f
P-RUN
20 kHz). This is because the C
R
pin charge/discharge current
ratio is 3.
RES
Q
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