M38002M4 Datasheet, PDF (102/173 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.5 Reset
2.5 Reset
2.5.1 Connection example of reset IC
1
Power source
5 Output
M62022L
Delay capacity
4
GND
3
0.1 µF
91 _VCC
35 _RESET
40 _VSS
3800 group
Fig. 2.5.1 Example of Poweron reset circuit
Figure 2.5.2 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.
System power
source voltage
+5
+
7
VCC1
RESET ⁵
2 _{VCC2 INT} 3
1 _{V1 GND Cd} 6
4
91 _VCC
35 _RESET
INT
40 _VSS
3800 group
M62009L, M62009P, M62009FP
Fig. 2.5.2 RAM back-up system
2-54
3800 GROUP USER’S MANUAL