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52
SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER
3827 Group
MITSUBISHI MICROCOMPUTERS
Table 14 Recommended operating conditions (Mask ROM version)
(V
CC
= 2.2 to 5.5 V, Ta = –20 to 85
°
C, unless otherwise noted)
Notes1:
When the oscillation frequency has a duty cycle of 50%.
2:
When using the microcomputer in low-speed mode, make sure that the sub-clock input oscillation frequency on condition that f(X
CIN
) < f(X
IN
)/3.
Input frequency for timers X and Y
(duty cycle 50%)
f(CNTR
0
)
f(CNTR
1
)
Symbol
Parameter
Limits
Typ.
Min.
MHz
Unit
Max.
4.0
(10
V
CC
–4)/9
(4.0 V
≤
V
CC
≤
5.5 V)
32.768
Main clock input oscillation frequency
(Note 1)
Sub-clock input oscillation frequency
(Notes 1, 2)
f(X
IN
)
f(X
CIN
)
(2.2 V
≤
V
CC
≤
4.0 V)
High-speed mode
(4.0 V
≤
V
CC
≤
5.5 V)
High-speed mode
(2.2 V
≤
V
CC
≤
4.0 V)
Middle-speed mode
8.0
(20
V
CC
–8)/9
8.0
50
MHz
MHz
MHz
MHz
kHz
Table 15 Recommended operating conditions (PROM version)
(V
CC
= 2.5 to 5.5 V, Ta = –20 to 85
°
C, unless otherwise noted)
Notes1:
When the oscillation frequency has a duty cycle of 50%.
2:
When using the microcomputer in low-speed mode, make sure that the sub-clock input oscillation frequency on condition that f(X
CIN
) < f(X
IN
)/3.
Input frequency for timers X and Y
(duty cycle 50%)
f(CNTR
0
)
f(CNTR
1
)
Symbol
Parameter
Limits
Typ.
Min.
MHz
Unit
Max.
4.0
(2
V
CC
)
(4.0 V
≤
V
CC
≤
5.5 V)
32.768
Main clock input oscillation frequency
(Note 1)
Sub-clock input oscillation frequency
(Notes 1, 2)
f(X
IN
)
f(X
CIN
)
(2.5 V
≤
V
CC
≤
4.0 V)
High-speed mode
(4.0 V
≤
V
CC
≤
5.5 V)
High-speed mode
(2.5 V
≤
V
CC
≤
4.0 V)
Middle-speed mode
–4
8.0
(4
V
CC
)
–8
8.0
50
MHz
MHz
MHz
MHz
kHz
Test conditions
Test conditions