M61048FP

Rev.1.00 Mar 04, 2005 page 14 of 23

Reset Circuit

The M61048FP reset circuit is shown in Figure 6. This circuit is composed of comparator, reference voltage section

and breeder resistor. Hysterics is given to detection voltage and release voltage.

The reset output is Nch open drain structure so the reset delay time depends on external CR value.

The reset circuit monitoring Vreg output to prevent microcomputer abnormal operation when Vcc voltage goes down

abnormally.

+

–

VREF

GND

Rh

RESET

R2

R1

VREG

VREG

Figure 6 Reset Circuit