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APPLICATION
2.7 Reset
2-69
3802 GROUP USER’S MANUAL
2.7 Reset
2.7.1 Connection example of reset IC
Figure 2.7.2 shows the system example which switch to the RAM backup mode by detecting a drop of the
system power source voltage with the INT interrupt.
Fig. 2.7.1 Example of Poweron reset circuit
Fig. 2.7.2 RAM back-up system
System power
source voltage
+5
M62009L, M62009P, M62009FP
7
V
CC
1
RESET
5
4
91
35
3
6
2
1
INT
GNDCd
V1
V
CC
2
3802 group
V
CC
INT
RESET
+
40
V
SS
M62022L
Delay capacity
3802 group
RESET
1
5
3
91
35
40
0.1 μF
Power source
GND
4
Output
V
SS
V
CC