Ricoh R3111x Series - Manual (Page 22)

R3111x
22
TYPICAL APPLICATION
•
R3111xxxxA CPU Reset Circuit (Nch Open Drain Output)
Case 1. Input Voltage to R3111xxxxA is equal to
Input Voltage to CPU
Case 2. Input Voltage to R3111xxxxA is unequal to
Input Voltage to CPU
R3111xxxxA
Series
V
DD
GND
OUT
R V
DD
RESET
CPU
GND
V
DD
470k Ω
R3111xxxxA
Series
V
DD
GND
OUT
R V
DD
RESET
CPU
GND
V
DD2
V
DD
470k Ω
•
R3111xxxxC CPU Reset Circuit (CMOS Output)
R3111xxxxC
Series
V
DD
GND
OUT
V
DD
RESET
CPU
GND
V
DD
•
R3111xxxxA Output Delay Time Circuit 1
(Nch Open Drain Output)
•
R3111xxxxA Output Delay Time Circuit 2
(Nch Open Drain Output)
R3111xxxxA
Series
V
DD
GND
OUT
R V
DD
RESET
CPU
GND
V
DD
470k Ω
R3111xxxxA
Series
V
DD
GND
OUT
R2 V
DD
RESET
CPU
GND
V
DD
470k Ω R1
100k Ω
•
Memory Back-up Circuit
R3111xxxxC
Series
GND
V
DD
D1
D2
V
DD
GND
OUT
A
B
C
Y1
Y2
Y3
Y4
V
CC
V
CC
RAM1
GND CS
V
CC
RAM2
GND CS
V
CC
RAM3
GND CS
V
CC
RAM4
GND CS