M38203M4 Datasheet, PDF (274/344 Pages) Mitsubishi Electric Semiconductor – 8-BIT SINGLE-CHIP MICROCOMPUTER

APPLICATION
2.10 Reset
2.10.3 Reset circuit
Design a configuration of the reset circuit so that the reset input voltage may be 0.5 V or less at the time
when the power sorce voltage passes 2.5 V.
Figure 2.10.4 shows the poweron reset conditions and Figure 2.10.5 shows poweron reset circuit examples.
Power on
VCC
2.5 V
0V
RESET
0V
Fig. 2.10.4 Poweron reset conditions
0.5 V
3820 group
RESET
27
VCC
73
3820 group
RESET
27
VCC
73
Power source voltage
detection circuit
Fig. 2.10.5 Poweron reset circuit examples
2–188
3820 GROUP USER’S MANUAL