38C3 datasheet(134/224 Pages) RENESAS

Part #	38C3

Description	8-BIT SINGLE-CHIP MICROCOMPUTER 740 FAMILY / 38000 SERIES

PDF	224 Pages

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Manufacturer	RENESAS [Renesas Technology Corp]

Direct Link	http://www.renesas.com

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134 / 224 page

38C3 Group User’s Manual

APPLICATION

2-69

2.7 Reset circuit

____________

The reset state is caused by applying an “L” level to the RESET pin. After that, the reset state is released

____________

by applying an “H” level to the RESET pin, so that the program is executed in the middle-speed mode from

the contents of the reset vector address.

2.7.1 Connection example of reset IC

Figure 2.7.1 shows the example of power-on reset circuit. Figure 2.7.2 shows the system example which

switches 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 power-on reset circuit

Fig. 2.7.2 RAM backup system example

VCC

RESET

VSS

M62022L

GND

38C3 Group

Power source

0.1

µF

Output

Delay capacity

VCC

RESET

INT

RESET

INT

VCC1

VCC2

GND

M62009L, M62009P, M62009FP

38C3 Group

VSS

System power

source voltage

+ 5V

38C3 Datasheet(PDF) 134 Page - Renesas Technology Corp