m3819 Renesas Electronics Corporation., m3819 Datasheet - Page 168

• Manufacturer Part Number: m3819
• Description: Mitsubishi 8-bit Single-chip Microcomputer 740 Family / 38000 Series
• Manufacturer: Renesas Electronics Corporation.

2. APPLICATION
2.8 Reset
Fig. 2.8.1 Example of Poweron reset circuit
Fig. 2.8.2 RAM back-up system
154
2.8.1 Connection example of reset IC
Figure 2.8.2 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.
source voltage
System power
Power source
+5
M62022L
GND
1
3
Delay capacity
M62009L, M62009P, M62009FP
3819 Group USER’S MANUAL
2
1
5
4
V
V1
+
Output
CC
2
7
V
GND Cd
0.1 F
CC
RESET
4
1
INT
5
3
6
91
35
40
91
35
RESET
V
V
V
RESET
INT
CC
SS
CC
3819 group
3819 group
MITS
UBISHI MICROCOMPUTER
3819 Group
2.8 Reset