Notes For Poweron Reset; Fig. 2.15.5 Voltage At Poweron Reset; Fig. 2.15.6 Example Of Reset Circuit (1); Fig. 2.15.7 Example Of Reset Circuit (2) - Renesas 7200 Series User Manual

2.15.3 Notes for poweron reset

When poweron reset, set the external reset circuit
so that the reset input voltage must be kept 0.6 V
or less until the power source voltage reaches
4.5 V after the power is turned on.
Set the external reset circuit so that the reset input
voltage must be kept 0.6 V or less when the power
source voltage falls 4.5 V after the power is turned
off.
Figures 2.15.5 to 2.15.7 show examples of external
reset circuit.

Fig. 2.15.6 Example of reset circuit (1)

V
CC
M37221M6-
RESET
XXXSP/FP
V
SS
7220 Group User's Manual
FUNCTIONAL DESCRIPTION
M37221M6-
XXXSP/FP
RESET

Fig. 2.15.5 Voltage at poweron reset

Fig. 2.15.7 Example of reset circuit (2)

2.15 Reset
Power source
voltage
4.5 V
V
0 V
CC
Reset input
voltage
0.6 V
0 V
Poweron
V
CC
RESET
M37221M6-
XXXSP/FP
V
SS
2-99